An environmental protection catalytic oxidation device for odorous gases

Abstract

This invention relates to the field of air pollution control technology, specifically to a catalytic oxidation device for odorous gases used in environmental protection. The device includes a mixing and impurity removal mechanism and a combustion mechanism. The mixing and impurity removal mechanism comprises a conical tank, a tank cover, a preheating box, a combustion chamber, spiral guide vanes, an impurity removal section, and a recovery box. The tank cover is detachably connected to the top of the conical tank. The combustion chamber is located inside the conical tank and connected to the tank cover. The preheating box is located on the outer surface of the combustion chamber. The spiral guide vanes are connected to the outer surface of the preheating box. The impurity removal section is detachably located at the bottom of the combustion chamber. The recovery box is detachably located at the bottom of the conical tank. The combustion mechanism includes a mounting box, silicon carbide heating rods, a catalytic rod, and an isolation block. The isolation block is detachably connected to the inside of the combustion chamber. Two sets of mounting boxes are provided and connected to both ends of the silicon carbide heating rods. The mounting box is connected to the isolation block. The catalytic rod is connected to the top of the isolation block. This invention simultaneously achieves the mixing, impurity removal, and preheating functions of odorous gases and air, improving the efficiency of air pollution treatment.

Description

Technical Field

[0001] This invention relates to the field of air pollution control technology, specifically to a device for the catalytic oxidation of odorous gases for environmental protection. Background Technology

[0002] High concentrations of malodorous gases are air pollutants that are mainly transmitted through the air. They irritate human senses and affect air quality. "Odor treatment" refers to the use of a series of physical, chemical, or biological technologies to remove or reduce malodorous substances in order to improve air quality and meet environmental protection requirements. It is an important means of air pollution control.

[0003] Chinese patent CN106247355A discloses a high-concentration odorous gas catalytic oxidation deodorization device and its deodorization method. The device includes a sealed shell, which is divided from bottom to top into a heat exchange zone, a heating zone, and a catalytic reaction zone. Air and odorous gas are thoroughly mixed before entering the heat exchange zone at the bottom of the device for preheating. The heat source for this preheating is the high-temperature gas generated after the catalytic reaction. The heat from the high-temperature gas is transferred to the gas to be treated through heat exchange, effectively utilizing the gas's residual heat and saving energy. The preheated odorous gas is then heated in the heating zone to reach the catalytic combustion reaction temperature. The heated odorous gas enters the catalyst layer, where a catalytic combustion reaction occurs, burning off the odor molecules and achieving deodorization. The reacted gas is cooled by heat exchange with the gas to be treated in the heat exchange zone and then discharged through the outlet pipe.

[0004] However, the aforementioned existing technologies have the following drawbacks: the odorous gas may contain large particulate matter (such as the substances or carriers that generate the odor) as well as impurities such as dust and oil droplets. Before the odorous gas undergoes catalytic combustion, it is necessary to remove these impurities to prevent them from covering the catalyst surface and clogging its microporous structure, thus preventing the organic matter in the exhaust gas from contacting the internal active sites, resulting in a sharp decrease in efficiency. Furthermore, the aforementioned existing technologies cannot remove impurities from the odorous gas. In addition, the aforementioned existing technologies require mixing the odorous gas with the air before preheating, which cannot achieve simultaneous mixing and preheating, resulting in insufficient efficiency of existing air pollution control equipment. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing an environmental protection catalytic oxidation device for odorous gases.

[0006] The technical solution of the present invention: a catalytic oxidation device for odorous gases for environmental protection, comprising:

[0007] The mixing and impurity removal mechanism includes pipe a, pipe b, a conical tank, a tank cover, a preheating box, a combustion chamber, spiral guide vanes, an impurity removal section, and a recovery box. The tank cover is detachably connected to the top of the conical tank. The combustion chamber is located inside the conical tank and connected to the tank cover. The preheating box is located on the outer surface of the combustion chamber. The spiral guide vanes are connected to the outer surface of the preheating box, and their outer circumference contacts the inner wall of the conical tank. The impurity removal section is detachably located at the bottom of the combustion chamber. The recovery box is detachably located at the bottom of the conical tank. Pipe a is connected to the conical tank. Pipe b is connected to pipe a.

[0008] The combustion mechanism includes a mounting box, a silicon carbide heating rod, a catalytic rod, an isolation block, a detection unit, and a high-temperature induced draft fan. The isolation block is detachably connected to the interior of the combustion chamber and divides the combustion chamber into a combustion chamber and a heating chamber. The mounting box has two sets and is detachably connected to both ends of the silicon carbide heating rod. The mounting box is connected to the isolation block. The catalytic rod is detachably connected to the top of the isolation block. The interior of the isolation block has a spiral gas chamber that communicates with the combustion chamber and the heating chamber. The detection unit is located on the tank cover and connected to the combustion chamber. The high-temperature induced draft fan is located on the tank cover and connected to the preheating box through a pipeline section.

[0009] Preferably, the impurity removal section includes an annular cover, a filter cloth, a honeycomb plate a, a honeycomb plate b, a guide rod, a sealing plug, and a spring; the filter cloth is detachably connected to the inner wall of the annular cover; a circular opening a is provided at the bottom of the combustion chamber; the annular cover is threadedly connected to the circular opening a; the honeycomb plate a is connected to the annular cover and has a guide hole thereon; the guide rod passes through the guide hole and is connected to the honeycomb plate b; the spring is connected to the guide rod and the honeycomb plate a; the sealing plug is connected to the honeycomb plate b to block the air holes on the honeycomb plate a.

[0010] Preferably, the bottom of the preheating box is provided with an annular opening; an annular box is threaded into the annular opening for recovering the dirt generated by the combustion of odorous gases.

[0011] Preferably, the combustion chamber is provided with an exhaust port; the preheating box is provided with an air inlet aligned with the exhaust port; and a valve b is provided inside the air inlet.

[0012] Preferably, the detection unit includes a mounting plate, a piston, an extraction pipe, a telescopic component, a sealing plug, and a detection sensor; the mounting plate is detachably connected to the can lid; the can lid has an opening; a circular opening b is provided at the top of the combustion chamber; the sealing plug is connected to the bottom of the mounting plate and penetrates through the opening and the circular opening b to be inserted into the combustion chamber; the piston is located on the mounting plate; the extraction pipe is connected to the piston, and extends through the mounting plate and the sealing plug to the interior of the combustion chamber and is connected to the piston; a valve a is provided on the extraction pipe; the detection sensor is located inside the piston.

[0013] Preferably, the piston part includes a piston tube, a piston block, a telescopic component, and a piston rod; the piston tube is connected to the mounting plate; one end of the suction pipe is connected to the bottom end of the piston tube; the piston block is located inside the piston tube; the piston rod is connected to the piston block; the telescopic component is located on the piston tube and connected to the piston rod; a housing is provided on the piston tube and communicates with the piston tube; and a detection sensor is located inside the housing.

[0014] Preferably, the piping section includes pipe c, pipe d, and pipe e; pipe e is connected to the exhaust end of the high-temperature induced draft fan; pipe c is inserted outside pipe e; pipe d passes through the tank cover and one end of it is connected to the preheating box; the other end of pipe d is threadedly connected to pipe c.

[0015] Preferably, the lid has a handle at the top to facilitate removing the lid from the conical can.

[0016] Preferably, the isolation block has a threaded groove; the preheating box and the combustion chamber have aligned threaded through holes; a locking screw is threaded into the threaded through hole; the locking screw is threaded into the threaded groove.

[0017] Compared with the prior art, the above-mentioned technical solution of the present invention has the following beneficial technical effects:

[0018] By incorporating a mixing and impurity removal mechanism, the mixture of odorous gas and air moves in a spiral flow, thereby completing the micro-mixing of odorous gas and air in a very short time, greatly improving the mixing degree and efficiency. During high-speed rotation, large particulate impurities in the odorous gas are thrown towards the inner wall of the separator under the action of strong centrifugal force. Under the combined action of downward airflow and gravity, they spiral downward along the inner wall and finally fall into the recovery box at the bottom for recycling. When the odorous gas and air are spirally flowing, they can exchange heat with the odorous gas after combustion in the preheating box, enabling the air pollution control equipment to simultaneously achieve the mixing, impurity removal, and preheating of odorous gas and air, thereby improving the efficiency of air pollution control and promoting the development of air pollution control equipment.

[0019] By incorporating a combustion mechanism, the mixed gas is obliquely ejected and tangentially enters the combustion chamber along the inner wall of the isolation block under the action of the spiral air chamber. This causes the mixed gas to spiral upward within the combustion chamber, creating a strong "air sweeping" effect near the combustion chamber wall. Even if extremely fine particles attempt to settle on the wall, they are "swept away" by the tangential airflow and reintroduced into the main airflow. This effectively prevents the initial adhesion of dirt generated during the combustion of odorous gases to the wall, giving the air pollution control equipment a certain degree of self-cleaning function, reducing subsequent cleaning work by staff, and improving the convenience of the air pollution control equipment. Attached Figure Description

[0020] Figure 1This is a perspective view of one embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the cross-sectional state of the conical tank in one embodiment of the present invention;

[0022] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0023] Figure 4 This is a schematic diagram of the connection structure between the high-temperature induced draft fan and the pipe d in the cross-sectional state of pipe c in one embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the connection structure between the detection unit and the combustion chamber, and between the preheating chamber and the spiral guide vanes in one embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the cross-sectional structure of the detection unit, combustion chamber, and preheating box in one embodiment of the present invention;

[0026] Figure 7 for Figure 6 Enlarged structural diagram at point B;

[0027] Figure 8 for Figure 6 Enlarged structural diagram at point C;

[0028] Figure 9 A schematic diagram of the assembly structure of the impurity removal unit in one embodiment of the invention;

[0029] Reference numerals: 1. Conical tank; 2. Tank lid; 3. Recovery box; 4. Piston tube; 5. High-temperature induced draft fan; 6. Pipe b; 7. Pipe a; 8. Handle; 9. Preheating box; 901. Valve b; 10. Spiral guide vane; 11. Piston rod; 12. Telescopic component; 13. Mounting plate; 14. Combustion chamber; 1401. Exhaust port; 15. Catalytic rod; 16. Isolation block; 17. Silicon carbide heating rod; 18. Annular cover; 19. Piston block; 20. Detection sensor; 21. Extraction pipe; 22. Annular box; 23. Honeycomb plate b; 24. Sealing plug; 25. Guide rod; 26. Honeycomb plate a; 27. Spring; 28. Filter cloth; 29. ​​Pipe c; 30. Pipe d; 31. Mounting box; 32. Locking screw. Detailed Implementation

[0030] Example 1, as Figures 1-6 as well as Figure 8 As shown, the present invention proposes an environmental protection catalytic oxidation device for odorous gases, which includes a mixing and impurity removal mechanism and a combustion mechanism;

[0031] The mixing and impurity removal mechanism includes pipe a7, pipe b6, conical tank 1, tank cover 2, preheating box 9, combustion chamber 14, spiral guide vanes 10, impurity removal section, and recovery box 3. The tank cover 2 is detachably connected to the top of the conical tank 1 (detachable connection methods include, but are not limited to, connection via bolts). A handle 8 is provided at the top of the tank cover 2 for easy removal from the conical tank 1 (for large-volume equipment, a lifting device can be used to hook the handle 8 and lift the tank cover 2). The combustion chamber 14 is located inside the conical tank 1 and connected to the tank cover 2. The preheating box 9 is located on the outer surface of the combustion chamber 14. A temperature sensor is installed inside the preheating box 9. The preheating box 9 is used to temporarily store the odorous gas after combustion, utilizing the heat exchange between the combusted odorous gas and the unburned odorous gas to achieve the preheating function of the unburned odorous gas. An annular opening is provided at the bottom of the preheating box 9. A spiral thread is installed inside the annular opening. A ring box 22 is connected to the combustion chamber 14 for recovering the sludge produced by the combustion of odorous gas; an exhaust port 1401 is provided on the combustion chamber 14; an air inlet aligned with the exhaust port 1401 is provided on the preheating box 9, and a valve b901 (a high-temperature resistant solenoid valve) is provided inside the air inlet; a spiral guide vane 10 is connected to the outer surface of the preheating box 9, and its outer circumference contacts the inner wall of the conical box; a detachable impurity removal section is provided at the bottom of the combustion chamber 14 for filtering out fine impurities in the odorous gas; a recovery box 3 is detachably provided at the bottom of the conical tank 1 (detachable connection including but not limited to threaded connection) for recovering large particulate impurities filtered out in the odorous gas; pipe a7 is connected to the conical tank 1; pipe b6 is connected to pipe a7; odorous gas enters the interior of the conical tank 1 through pipe a7; air enters pipe a7 through pipe b6 and then follows the odorous gas into the conical tank 1;

[0032] The combustion mechanism includes a mounting box 31, silicon carbide heating rods 17, catalytic rods 15, an isolation block 16, a detection unit, and a high-temperature induced draft fan 5. The isolation block 16 is detachably connected to the inside of the combustion chamber 14 and divides the combustion chamber 14 into a combustion chamber and a heating chamber. A threaded groove is provided on the isolation block 16. Aligned threaded through holes are provided on the preheating box 9 and the combustion chamber 14. A locking screw 32 is threaded into the threaded through hole. The locking screw 32 is threaded into the threaded groove, and its surface is coated with a high-temperature resistant and corrosion-resistant coating (e.g., organosilicon high-temperature resistant coating). The mounting box 31 has two sets of components detachably connected to both ends of the silicon carbide heating rods 17 (the mounting box 31 contains a power supply for the silicon carbide heating rods 17, and the mounting box 31 is made of heat-insulating material to reduce the influence of the internal temperature of the combustion chamber 14 on the power supply). The mounting box 31 is connected to the isolation block 16. The catalytic rod 15 is detachably connected to the isolation block 16. The top of the isolation block 16 has a slot; the catalyst rod 15 is inserted into the slot; the catalyst rod 15 is made of transition metal oxide and has dense pores on its surface to increase the contact area with the odor and improve the combustion efficiency of the odor); the interior of the isolation block 16 has a spiral gas chamber that communicates with the combustion chamber and the heating chamber (the end of the spiral gas chamber that communicates with the combustion chamber is close to the inner wall of the combustion chamber, the odor is obliquely sprayed out through the spiral gas chamber and enters the combustion chamber tangentially along the inner wall of the combustion chamber, so that the odor flows spirally upward in the combustion chamber); the detection unit is located on the tank cover 2 and connected to the combustion chamber 14 to extract part of the gas in the combustion chamber and detect the carbon monoxide concentration therein to determine whether the odor is fully burned; the high-temperature induced draft fan 5 is located on the tank cover 2 and connected to the preheating box 9 through the pipeline section, and the high-temperature induced draft fan 5 is used to extract and discharge the purified gas in the preheating box 9.

[0033] In this embodiment, odorous gas enters the conical tank 1 through pipe a7; air enters pipe a7 through pipe b6 and then follows the odorous gas into the conical tank 1 (ensuring that the injection rates of odorous gas and air are the same and that the odorous gas is injected intermittently); after entering the conical tank 1, the odorous gas and air flow spirally along the spiral guide vanes 10. When the odorous gas and air flow in a spiral form, they are no longer two independent "streams," but are stretched and twisted, like two twisted ropes. This three-dimensional entanglement structure causes the contact interface between the two gases to grow exponentially. More contact area means more molecules have the opportunity to diffuse across the interface, thereby completing the microscopic mixing of odorous gas and air in a very short time, greatly improving the mixing degree and mixing efficiency; during high-speed rotation, since the density of large particulate impurities is much greater than that of gas, they are subjected to strong centrifugal force. Large particles of impurities thrown against the inner wall of the separator are spiraled downwards along the inner wall under the combined action of downward airflow and gravity, eventually falling into the recovery box 3 at the bottom for recycling. When the downward spiraling mixed gas (odor and air) reaches the bottom of the conical tank 1, it forms an upward internal vortex, spiraling upwards along the central axis of the conical tank 1, and then passes through the impurity removal section into the combustion chamber 14. The impurity removal section can filter out tiny impurities in the odor. At the same time, when the odor and air are spiraling, they can exchange heat with the odor after combustion in the preheating box 9. The spiral guide vanes 10 can extend the flow path of the odor and air, ensuring sufficient preheating. This allows the air pollution control equipment to simultaneously achieve mixing, impurity removal and preheating of odor and air, thereby improving the efficiency of air pollution control and promoting the development of air pollution control equipment.

[0034] After the odor enters the combustion chamber 14, the mixed gas (odor and air) is heated to a standard temperature (250℃-400℃) by the silicon carbide heating rod 17. Then, the mixed gas is obliquely ejected through the spiral gas chamber inside the isolation block 16 and enters the combustion chamber tangentially along the inner wall of the combustion chamber, causing the odor to spiral upward in the combustion chamber. When the odor comes into contact with the catalytic rod 15, a catalytic combustion reaction occurs on its surface. The spirally flowing mixed gas will form a strong "gas sweeping" effect near the wall of the combustion chamber. Even if extremely fine particles try to settle on the wall, they will be "swept away" by the tangential airflow and reintroduced into the main airflow. This effectively prevents the initial adhesion of dirt generated during the combustion of odor to the wall, giving the air pollution control equipment a certain self-cleaning function, reducing the subsequent cleaning work of the staff, and improving the convenience of the air pollution control equipment.

[0035] Example 2, as Figure 9As shown, this invention proposes an environmental protection catalytic oxidation device for odorous gases. Compared to Embodiment 1, this embodiment further details the structure of the impurity removal section, which includes an annular cover 18, a filter cloth 28, a honeycomb plate a26, a honeycomb plate b23, a guide rod 25, a sealing plug 24, and a spring 27. The filter cloth 28 is detachably connected to the inner wall of the annular cover 18 (detachable connection includes, but is not limited to, installation via screws; the filter cloth 28 is made of glass fiber material, possessing excellent high-temperature resistance and tensile strength). A circular opening a is provided at the bottom of the combustion chamber 14; the annular cover 18 is threadedly connected to the circular opening a; the honeycomb plate a26 is connected to the annular cover 18 and has a guide hole; the guide rod 25 passes through the guide hole and is connected to the honeycomb plate b23; the spring 27 is connected to the guide rod 25 and the honeycomb plate a26; the sealing plug 24 is connected to the honeycomb plate b23 to block the pores on the honeycomb plate a26.

[0036] In this embodiment, when the mixture of air and odor flows spirally upward along the central axis region of the conical tank 1, it first passes through the filter cloth 28 and enters the inner side of the annular cover 18. The filter cloth 28 can filter out small particulate impurities in the odor. Then, the mixture will squeeze the sealing plug 24 and drive the honeycomb plate b23 to move upward, so that the sealing plug 24 separates from the air holes on the honeycomb plate a26. During this process, the guide rod 25 will move upward with the honeycomb plate b23 and compress the spring 27. The mixture can pass through the air holes on the honeycomb plate a26 and the honeycomb plate b23 to enter the heating chamber. The honeycomb plate a26 and the honeycomb plate b23 can achieve the function of uniform distribution of the mixture, ensuring that the mixture is heated evenly, thereby ensuring the uniformity of odor treatment by the air pollution control equipment.

[0037] It should be noted that the impurity removal section can be removed from the bottom of the combustion chamber 14 by rotating the annular cover 18, which makes it easy to clean or replace the filter cloth 28.

[0038] Example 3, as Figures 3-6As shown, the present invention proposes an environmental protection catalytic oxidation device for odorous gases. Compared with Embodiment 2, this embodiment further details the structure of the detection unit. The detection unit includes a mounting plate 13, a piston, an extraction pipe 21, a telescopic component 12, a sealing plug, and a detection sensor 20. The mounting plate 13 is detachably connected to the tank cover 2. The tank cover 2 has an opening. The top of the combustion chamber 14 has a circular opening b. The sealing plug is connected to the bottom of the mounting plate 13 and penetrates through the opening and the circular opening b to be inserted into the combustion chamber 14. The piston is mounted on the mounting plate 13. The extraction pipe 21 is connected to the piston and extends through the mounting plate 13 and the sealing plug into the combustion chamber 14 and is connected to the piston. The extraction pipe 21 is equipped with a valve a (valve a is a high-temperature resistant solenoid valve). The detection sensor 20 is located inside the piston. The piston includes a piston tube 4. The system includes a piston block 19, a telescopic component 12, and a piston rod 11; a piston tube 4 connected to a mounting plate 13; one end of a suction pipe 21 connected to the bottom end of the piston tube 4; a piston block 19 located inside the piston tube 4; a piston rod 11 connected to the piston block 19; a telescopic component 12 located on the piston tube 4 and connected to the piston rod 11 (the telescopic component 12 includes, but is not limited to, a cylinder or other device); a housing connected to the piston tube 4; a detection sensor 20 located inside the housing (the detection sensor 20 includes, but is not limited to, a high-temperature electrochemical sensor used to detect the carbon monoxide concentration in the mixed gas); a piping section including pipe c29, pipe d30, and pipe e; pipe e connected to the suction end of the high-temperature induced draft fan 5; pipe c29 inserted outside pipe e; pipe d30 penetrating the tank cover 2 and one end connected to the preheating box 9; and the other end of pipe d30 threadedly connected to pipe c29.

[0039] In this embodiment, when the reaction time in the combustion chamber reaches a preset value, the external controller (PLC controller) opens valve a, and then controls the telescopic component 12 to move the piston rod 11 upward. The piston rod 11 moves the piston block 19 upward (until the position of the piston block 19 is higher than the position of the detection sensor 20, so that the extracted odor can contact the detection sensor 20). This allows the piston tube 4, in conjunction with the suction pipe 21, to extract some of the odor in the combustion chamber into the piston tube 4. The detection sensor 20 can detect the carbon monoxide concentration in the odor. If the carbon monoxide concentration is lower than 50-100 mg / m³, it indicates that the odor is fully combusted. At this time, the detection sensor 20 feeds back to the external controller, and the external controller opens valve b901, allowing the purified gas generated by the combustion of the odor in the combustion chamber to enter the preheating box 9. Otherwise, it indicates that the odor is not fully combusted, and the odor combustion time is extended to ensure that the air pollution control equipment can adequately treat the odor.

[0040] It is worth noting that the odor is injected into the combustion chamber 14 intermittently, and the air will continue to be injected for a period of time after the odor injection stops, so as to ensure that the odor can completely enter the combustion chamber 14. When valve b901 is opened, the air is injected again for a period of time to ensure that all the purified gas in the combustion chamber is discharged into the preheating box 9.

[0041] It should be noted that since the purified gas in the preheating box 9 is not discharged immediately, the dirt (dirt produced by the combustion of odorous gas) that enters the preheating box 9 with the purified gas has enough time to settle and accumulate in the annular box 22. The purified gas in the preheating box 9 can be discharged by using the high-temperature induced draft fan 5.

[0042] It is worth noting that by rotating tube c29, it is separated from tube d30, which facilitates the separation of can lid 2 from the top of conical can 1.

[0043] All electronic devices in this patent are controlled by an external controller (PLC controller).

[0044] In summary, the odor enters the conical tank 1 through pipe a7; air enters pipe a7 through pipe b6 and then follows the odor into the conical tank 1 (ensuring the injection rates of odor and air are the same and the odor is injected intermittently); after entering the conical tank 1, the odor and air flow spirally along the spiral guide vanes 10. When the odor and air flow in a spiral form, they are no longer two independent "streams," but are stretched and twisted, like two intertwined braids. This three-dimensional intertwined structure causes the contact interface between the two gases to increase exponentially, and the larger contact area means... This allows more molecules to diffuse across the interface, thus completing the microscopic mixing of odor and air in a very short time, greatly improving the mixing degree and efficiency. During high-speed rotation, because the density of large particles is much greater than that of the gas, they are subjected to strong centrifugal force and thrown towards the inner wall of the separator. These large particles, thrown towards the inner wall, spiral downwards along the inner wall under the combined action of downward airflow and gravity, eventually falling into the bottom recovery tank 3 for recycling. When the downward spiraling mixed gas (odor and air) reaches the bottom of the conical tank 1, it will... An upward swirling flow is formed, spiraling upwards along the central axis region of the conical tank 1, and then passing through the filter cloth 28 in the impurity removal section. The filter cloth 28 can filter out tiny impurities in the odor gas. Afterwards, the mixed gas will squeeze the sealing plug 24 and drive the honeycomb plate b23 to move upwards, causing the sealing plug 24 to separate from the air holes on the honeycomb plate a26. During this process, the guide rod 25 will move upwards with the honeycomb plate b23 and compress the spring 27 (after the injection of odor gas stops, the spring 27 will drive the honeycomb plate b23 to reset, preventing odor gas leakage in the combustion chamber 14). The mixed gas can pass through the honeycomb plate a26. The air holes on honeycomb panels a26 and b23 enter the heating chamber. Honeycomb panels a26 and b23 can achieve uniform distribution of the mixed gas, ensuring that the mixed gas is heated evenly. At the same time, when the odor and air are spirally flowing, they can exchange heat with the odor after combustion in the preheating box 9. The spiral guide vanes 10 can extend the flow path of the odor and air, ensuring sufficient preheating. This enables the air pollution control equipment to simultaneously achieve mixing, impurity removal and preheating of odor and air, thereby improving the efficiency of air pollution control and promoting the development of air pollution control equipment.

[0045] After the odor enters the combustion chamber 14, the mixed gas (odor and air) is heated to a standard temperature (250℃-400℃) by the heating action of the silicon carbide heating rod 17. Then, the mixed gas is obliquely ejected through the spiral gas chamber inside the isolation block 16 and enters the combustion chamber tangentially along the inner wall of the combustion chamber, causing the odor to spiral upward in the combustion chamber. When the odor comes into contact with the catalytic rod 15, a catalytic combustion reaction occurs on its surface. The spirally flowing mixed gas will form a strong "gas sweeping" effect near the wall of the combustion chamber. Even if extremely fine particles try to settle on the wall, they will be "swept away" by the tangential airflow and reintroduced into the main airflow. This effectively prevents the initial adhesion of dirt generated during the combustion of odor to the wall, reduces the amount of dirt residue in the combustion chamber, and gives the air pollution control equipment a certain self-cleaning function, reducing the subsequent cleaning work of the staff and improving the convenience of the air pollution control equipment.

[0046] When the reaction time in the combustion chamber reaches the preset value, the external controller (PLC controller) opens valve a, and then controls the telescopic component 12 to move the piston rod 11 upward. The piston rod 11 moves the piston block 19 upward (until the position of the piston block 19 is higher than the position of the detection sensor 20, so that the extracted odor can contact the detection sensor 20). This allows the piston tube 4, in conjunction with the suction pipe 21, to extract some of the odor in the combustion chamber into the piston tube 4. The detection sensor 20 can detect the carbon monoxide concentration in the odor. If the carbon monoxide concentration is lower than 50-100 mg / m³, it indicates that the odor is fully combusted. At this time, the detection sensor 20 feeds back to the external controller, and the external controller opens valve b901 (before this, the external controller will control the piston block 19 to move downward to squeeze the extracted gas back into the combustion chamber). This allows the purified gas produced by the combustion of the odor in the combustion chamber to enter the preheating box 9, which is convenient for preheating the subsequently injected odor. Conversely, if the concentration is higher than 50-100 mg / m³, it indicates that the odor is not fully combusted. The odor combustion time is extended to ensure the adequacy of the air pollution control equipment in treating the odor.

[0047] When valve b901 is opened, air is injected again through pipe b6 to ensure that the purified gas in the combustion chamber and the dirt produced by combustion can all enter the preheating box 9. When the exhaust time is over, valve b901 is closed and the air injection stops; then the next round of odor injection is carried out.

[0048] When the temperature sensor inside the preheating box 9 detects that the temperature of the purified gas is below the threshold (generally, the temperature of the purified gas inside the preheating box 9 will be below the threshold after 2-3 odor injection operations), it will send feedback to the external controller. The external controller will then control the high-temperature induced draft fan 5 to work and discharge the purified gas from the preheating box 9. Since the purified gas inside the preheating box 9 will not be discharged immediately, the dirt (dirt produced by the combustion of odorous gas) that enters the preheating box 9 with the purified gas has enough time to settle and accumulate in the annular box 22.

[0049] After the deodorization operation is completed, when it is necessary to clean the annular box 22 and the filter cloth 28, the can lid 2 can be removed from the top of the conical can 1, and then the spiral guide vane 10, the preheating box 9 and the combustion chamber 14 can be removed from the conical can 1. By rotating the annular cover 18, the impurity removal part can be removed from the bottom of the combustion chamber 14, which is convenient for cleaning or replacing the filter cloth 28. By rotating the annular box 22, the annular box 22 can be removed from the bottom of the preheating box 9, which is convenient for cleaning the dirt collected inside the annular box 22. By rotating the locking screw 32 and removing it, the connection between the isolation block 16 and the combustion chamber 14 is released, so that the isolation block 16 can be removed from the inside of the combustion chamber 14, and then the catalytic rod 15 and the silicon carbide heating rod 17 can be removed, which is convenient for cleaning or replacing the catalytic rod 15 and the silicon carbide heating rod 17, thus facilitating the cleaning and maintenance of the air pollution control equipment and extending its service life.

[0050] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A device for catalytic oxidation of odorous gases for environmental protection, characterized in that, include: The mixing and impurity removal mechanism includes pipe a (7), pipe b (6), conical tank (1), tank cover (2), preheating box (9), combustion chamber (14), spiral guide vane (10), impurity removal section and recovery box (3); the tank cover (2) is detachably connected to the top of the conical tank (1); the combustion chamber (14) is located inside the conical tank (1) and connected to the tank cover (2); the preheating box (9) is located on the outer surface of the combustion chamber (14); the spiral guide vane (10) is connected to the outer surface of the preheating box (9) and its outer circumference is in contact with the inner wall of the conical tank; the impurity removal section is detachably located at the bottom of the combustion chamber (14); the recovery box (3) is detachably located at the bottom of the conical tank (1); pipe a (7) is connected to the conical tank (1); pipe b (6) is connected to pipe a (7); The combustion mechanism includes a mounting box (31), a silicon carbide heating rod (17), a catalyst rod (15), an isolation block (16), a detection unit, and a high-temperature induced draft fan (5); the isolation block (16) is detachably connected to the inside of the combustion chamber (14) and divides the combustion chamber (14) into a combustion chamber and a heating chamber; the mounting box (31) is provided in two sets and is detachably connected to both ends of the silicon carbide heating rod (17); the mounting box (31) is connected to the isolation block (16); the catalyst rod (15) is detachably connected to the top of the isolation block (16); the inside of the isolation block (16) is provided with a spiral gas chamber that communicates with the combustion chamber and the heating chamber; the detection unit is located on the tank cover (2) and is connected to the combustion chamber (14); the high-temperature induced draft fan (5) is located on the tank cover (2) and is connected to the preheating box (9) through a pipeline section; The impurity removal section includes an annular cover (18), a filter cloth (28), a honeycomb plate a (26), a honeycomb plate b (23), a guide rod (25), a sealing plug (24), and a spring (27); the filter cloth (28) is detachably connected to the inner wall of the annular cover (18); a circular opening a is provided at the bottom of the combustion chamber (14); the annular cover (18) is threadedly connected to the circular opening a; the honeycomb plate a (26) is connected to the annular cover (18) and has a guide hole; the guide rod (25) passes through the guide hole and is connected to the honeycomb plate b (23); the spring (27) is connected to the guide rod (25) and the honeycomb plate a (26); the sealing plug (24) is connected to the honeycomb plate b (23) to block the air holes on the honeycomb plate a (26); An exhaust port (1401) is provided on the combustion chamber (14); an air inlet aligned with the exhaust port (1401) is provided on the preheating box (9); a valve b (901) is provided inside the air inlet. The detection unit includes a mounting plate (13), a piston, an extraction pipe (21), a telescopic component (12), a sealing plug, and a detection sensor (20); the mounting plate (13) is detachably connected to the can lid (2); the can lid (2) has an opening; the top of the combustion chamber (14) has a circular opening b; the sealing plug is connected to the bottom of the mounting plate (13) and passes through the opening and the circular opening b to be inserted into the combustion chamber (14); the piston is located on the mounting plate (13); the extraction pipe (21) is connected to the piston, and the extraction pipe (21) extends through the mounting plate (13) and the sealing plug to the interior of the combustion chamber (14) and is connected to the piston; the extraction pipe (21) is equipped with a valve a; the detection sensor (20) is located inside the piston; The piston section includes a piston tube (4), a piston block (19), a telescopic component (12), and a piston rod (11); the piston tube (4) is connected to the mounting plate (13); one end of the suction pipe (21) is connected to the bottom end of the piston tube (4); the piston block (19) is located inside the piston tube (4); the piston rod (11) is connected to the piston block (19); the telescopic component (12) is located on the piston tube (4) and connected to the piston rod (11); a box is provided on the piston tube (4) and communicates with the piston tube (4); the detection sensor (20) is located inside the box.

2. The catalytic oxidation device for odorous gases for environmental protection according to claim 1, characterized in that, The bottom of the preheating box (9) is provided with an annular opening; an annular box (22) is threaded into the annular opening for recycling the dirt generated by the combustion of odorous gases.

3. The catalytic oxidation device for odorous gases for environmental protection according to claim 1, characterized in that, The piping section includes pipe c (29), pipe d (30) and pipe e; pipe e is connected to the exhaust end of the high-temperature induced draft fan (5); pipe c (29) is inserted outside pipe e; pipe d (30) passes through the tank cover (2) and one end of it is connected to the preheating box (9); the other end of pipe d (30) is threadedly connected to pipe c (29).

4. The catalytic oxidation device for odorous gases for environmental protection according to claim 1, characterized in that, The top of the lid (2) is provided with a handle (8) to facilitate removing the lid (2) from the conical can (1).

5. The catalytic oxidation device for odorous gases for environmental protection according to claim 1, characterized in that, The isolation block (16) has a threaded groove; the preheating box (9) and the combustion chamber (14) have aligned threaded through holes; the threaded through holes are connected to a locking screw (32); the locking screw (32) is threadedly connected to the threaded groove.

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