Non-filtering biological decomposition exhaust gas treatment device

Abstract

The application relates to the technical field of waste gas treatment, in particular to a non-filtering biological decomposition waste gas treatment device, which comprises a decomposition tank, a filler bed, an air pipe, a spray head, a grid plate, a return tank, a moving assembly, a flowing assembly and an atomizing assembly. A plurality of grid plates are arranged at the bottom end of the decomposition tank. The return tank is arranged at the lower end of the decomposition tank. Compartments are arranged at the two sides of the decomposition tank. The moving assembly is arranged in the compartments and connected with the grid plates. The atomizing assembly is arranged at the lower end of the return tank. The return tank recovers the liquid in the decomposition tank and preliminarily decomposes the waste gas through the atomizing assembly. The decomposed waste gas passes through the grid plates and flows into the filler bed for secondary decomposition and then is discharged. The moving assembly drives the grid plates to move and prevents the filler bed from caking. The flowing assembly prevents the surface of the grid plate from being blocked and guides the liquid to flow into the return tank, thereby solving the problem that the filler bed layer is prone to be blocked and caked when the waste gas quantity is large.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, specifically to a non-filtering biological decomposition waste gas treatment device. Background Technology

[0002] Energy-saving and environmentally friendly waste gas treatment technologies are also a part of environmental engineering construction, and biological waste gas treatment technology is an important component. Currently, the main biological waste gas treatment technologies include biofilters, biotrickling filters, and bioscrubbers. These technologies primarily treat pollutants in waste gas by using porous packing materials as a carrier for microbial reproduction and growth, and utilizing the metabolic activities of these microorganisms to degrade organic pollutants and odorous substances contained in the waste gas.

[0003] The aforementioned biological waste gas treatment technology is widely used due to its relatively low cost and lack of secondary pollution. However, some problems still exist in its practical application. The packing bed is prone to clogging and compaction, especially when the waste gas volume is large. The particulate matter in the waste gas increases, leading to a large amount of particulate matter clogging the pores of the packing. At the same time, the increase in waste gas volume is often accompanied by an increase in the number of pollutants. These pollutants provide excessive nutrients for microorganisms, stimulating their over-reproduction. This results in a large increase in biomass in the packing bed in a short period of time. Since biomass has a certain degree of viscosity, the particulate matter in the pores of the packing will adhere to the excess biomass, further clogging the pores between the packing.

[0004] Furthermore, when operating at high gas flow rates, the requirements for the distribution of gas flow paths are extremely high. Since the gas preferentially chooses to pass through channels with less resistance, other areas with greater resistance are prone to insufficient airflow, leading to the accumulation of biomass and particulate matter. This further exacerbates blockage and caking, which in turn leads to a significant increase in the pressure drop of the entire system, severely reducing the efficiency of biological purification and even causing the system to shut down.

[0005] In view of the above, the present invention designs a non-filterable biodegradation waste gas treatment device to solve the problem that the packing bed is prone to clogging and caking when the waste gas volume is large. Summary of the Invention

[0006] This invention designs a non-filterable biological decomposition waste gas treatment device. The device recovers liquid containing microorganisms from the decomposition tank via a return tank and performs preliminary decomposition of the waste gas using an atomizing component, reducing the pollutant content. The decomposed waste gas is then passed through a grid plate into a packed bed for secondary decomposition before being discharged, preventing excessive microbial growth. Simultaneously, a moving component drives the grid plate to reciprocate up and down, preventing the packed bed from caking. A flow component further prevents surface blockage of the grid plate while guiding the liquid containing microorganisms back into the return tank. This solves the problem of blockage and caking of the packed bed when treating large volumes of waste gas.

[0007] To achieve the above-mentioned technical objectives, the present invention provides the following technical solution:

[0008] A non-filterable biological decomposition waste gas treatment device includes a decomposition tank, a packing bed, an air pipe, nozzles, grids, a return tank, a moving component, a flow component, and an atomizing component. The packing bed is installed in the middle part of the decomposition tank, the nozzles are installed on the upper inner side of the decomposition tank, multiple grids are installed at the bottom of the decomposition tank, the return tank is located at the lower end of the decomposition tank, and compartments are provided on both sides of the decomposition tank. The moving component is installed in the compartments and connected to the grids, and the atomizing component is installed at the lower end of the return tank. The air pipe connects to the bottom of the atomizing component. The return tank recovers liquid from the decomposition tank and performs preliminary decomposition of the waste gas through the atomizing component. After decomposition, the waste gas flows through the grids to the packing bed for secondary decomposition before being discharged. The moving component is used to drive the grids to move and prevent the packing bed from caking. The flow component prevents the grid surface from being blocked and guides the liquid to flow into the return tank.

[0009] In the above scheme, the packing bed mainly consists of inorganic fillers such as volcanic rock and ceramsite, and is filled with microbial carriers such as PC sponge, as well as a mixture of various granular additives (main components include water-retaining agents, nutrient slow-release agents, and adsorbents). The nozzles are uniformly installed on the upper inner side of the decomposition tank, and multiple grids are installed in a linear array at the bottom of the decomposition tank. The distance between adjacent grids is less than the minimum particle size of the inorganic fillers such as volcanic rock and ceramsite. The return tank is located at the lower end of the decomposition tank, and compartments are provided on both sides of the decomposition tank. The moving component is installed in the compartment and connected to the grids. The atomizing component is installed at the lower end of the return tank, and the vent pipe connects to the bottom of the atomizing component. The return tank recovers the liquid in the decomposition tank and performs preliminary decomposition of the waste gas through the atomizing component. After decomposition, the waste gas flows through the grids to the packing bed for secondary decomposition before being discharged. The moving component is used to drive the grids to move and prevent the packing bed from caking. The flow component prevents the grid surface from being blocked while guiding the liquid to flow into the return tank.

[0010] Preferably, the atomizing component includes a bioreactor, a high-pressure swirl nozzle, and a multi-layer baffle plate. The bioreactor is installed at the lower end of the return tank, the high-pressure swirl nozzle is installed at the upper end of the bioreactor and connected to the return tank, and the multi-layer baffle plate is installed inside the bioreactor.

[0011] In the above scheme, when the motor drives the cam to rotate, all the grid plates will form a wave-like undulation, causing the inorganic packing at the lower end of the packing bed to move in an interlaced manner, avoiding the inorganic packing from caking. At the same time, the size of the gap between adjacent inorganic packing is constantly changed, thereby constantly changing the gas flow channel and preventing uneven airflow. In addition, through this setting, the position of the exhaust gas sprayed from the vent in the grid plate on the adjacent grid plates will constantly change, thereby achieving the effect of thoroughly cleaning the adjacent grid plates and preventing some dead corners on the grid plates from being unable to be cleaned.

[0012] Preferably, the grid plate has a cavity inside, which is connected to the biological reaction tank. The grid plate has multiple air vents on its outer side. The air vents are elongated and slope upward from the inside to the outside, and the inner diameter of the air vents gradually decreases from the inside to the outside.

[0013] In the above scheme, setting the vent to be inclined upward from the inside out allows the exhaust gas to clean the surface of adjacent grid plates when it is blown out, preventing microorganisms and their secretions from remaining on the surface of adjacent grid plates. At the same time, it will give the ejected exhaust gas an upward initial velocity, which can clean the gaps of inorganic filler accumulated above the grid plates. The gradual reduction of the entire inner diameter of the vent from the inside out can further increase this initial velocity by reducing its cross-sectional area, and at the same time enhance the cleaning effect on the surface area of ​​adjacent grid plates.

[0014] Preferably, the top of the grid plate is provided with a protrusion, and the top of the protrusion is elliptical.

[0015] In the above scheme, by setting protrusions on the surface of the grid plate and setting the top of the protrusions to be elliptical, the effect of preventing the packing bed from caking can be further enhanced. At the same time, the resistance faced by the grid plate when moving upward can be reduced, thereby reducing the wear of the grid plate during the up and down movement.

[0016] Preferably, the motion component includes a motor, a chain, a mounting tube, gears, and a cam. The motor is installed outside the decomposition tank, the mounting tube is installed inside the compartment, multiple gears are installed on the mounting tube, elliptical mating holes are provided on both sides of the grid plate, the cam is installed in the elliptical mating holes and passes through the compartment to connect with the gears, and the chain connects the motor and the gears.

[0017] In the above scheme, when the motor drives the cam to rotate, all the grid plates will form a wave-like undulation, causing the inorganic packing at the lower end of the packing bed to move in an interlaced manner, avoiding the inorganic packing from caking. At the same time, the size of the gap between adjacent inorganic packing is constantly changed, thereby constantly changing the gas flow channel and preventing uneven airflow. In addition, through this setting, the position of the exhaust gas sprayed from the vent in the grid plate on the adjacent grid plates will constantly change, thereby achieving the effect of thoroughly cleaning the adjacent grid plates and preventing some dead corners on the grid plates from being unable to be cleaned.

[0018] Preferably, the flow assembly includes a flow plate and a fixing frame. Multiple fixing frames are installed on both sides of the decomposition tank. The flow plate is fixed on the fixing frame and is L-shaped. Multiple ventilation grooves corresponding to ventilation ports are opened on the surface of the flow plate. The width of the ventilation grooves is slightly larger than that of the ventilation ports.

[0019] In the above scheme, by setting it up in this way, the path of liquid flow can be changed by continuously changing the channels through which the liquid can flow, thereby preventing the problem of local dryness leading to microbial dehydration and inactivation, and local excessive moisture and anaerobic conditions that produce viscous metabolites.

[0020] Preferably, the bottom of the decomposition tank is provided with a groove, the lowest point of the groove is connected to the return tank, and a filter screen is provided inside the groove.

[0021] In the above scheme, a groove is provided at the bottom of the decomposition tank so that the liquid flowing to the bottom of the decomposition tank can quickly flow into the return tank, thereby preventing the liquid from accumulating at the bottom of the decomposition tank. At the same time, a filter screen is installed in the groove to prevent some small pieces of debris from entering the return tank.

[0022] Preferably, a nutrient tank and an electrically controlled pump nozzle are installed on one side of the return tank, and a detection module is installed at the connection between the bottom of the bioreactor and the aeration pipe. The detection module is electrically connected to the electrically controlled pump nozzle.

[0023] In the above-described scheme, the concentration of pollutants in the exhaust gas is detected by a detection module set at the bottom of the bioreactor, and a corresponding amount of nutrients is injected into the return material tank accordingly. This maintains the number of microorganisms in the entire device within a balanced range, avoiding both excessive and insufficient numbers of microorganisms. Compared to the existing technology of adding a large amount of organic matter to the packing bed in biological filters to allow it to reproduce naturally, this invention can better control the number of microorganisms by injecting nutrients. At the same time, by replenishing nutrients, the entire device can operate for a long time, avoiding the problem of needing to replace the organic packing material periodically in the existing technology.

[0024] Preferably, a reflux pump is installed at the bottom of the bioreactor, and the reflux pump is connected to the nozzle.

[0025] In the above scheme, after the waste gas is absorbed once, the droplet spray containing microorganisms and nutrients will condense at the bottom of the bioreactor and return to the top of the decomposition tank through the return pump. It will then be sprayed into the decomposition tank through the nozzle. At this time, the microorganisms and nutrients in the liquid will replenish the microorganisms on the packing bed and provide them with food to promote their reproduction.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. This invention pre-treats waste gas by setting up an atomizing component and utilizing the microorganisms that multiply in the decomposition tank. A large amount of pollutants are reacted in the biological reaction tank, avoiding excessive pollutants that could lead to rapid proliferation of microorganisms in the decomposition tank. At the same time, by setting up a nutrient tank in the return material tank, the amount of nutrient added is determined by detecting the waste gas concentration, thereby controlling the number of microorganisms. Compared with the traditional method of placing microorganisms on a packing bed and feeding them with organic matter for automatic reproduction, this invention increases controllability and makes the entire system more stable.

[0028] 2. This invention, by setting up a grid plate and a moving component, continuously changes the accumulation of inorganic packing at the lower end of the packing bed by controlling the grid plate to move up and down, thus preventing the packing bed from caking. At the same time, this method continuously changes the size of the pores between the inorganic materials in the packing bed, thereby continuously changing the gas flow channels, preventing the formation of "dead zones," and ensuring that microorganisms are evenly distributed in the packing bed, thereby improving the cleaning effect on waste gas.

[0029] 3. This invention, by setting up a flow component and using a shielding grid, allows liquid to flow out from the bottom of the decomposition tank, preventing liquid accumulation in the decomposition tank due to continuously rising gas. Simultaneously, it continuously changes the liquid flow path, preventing localized areas from drying out and becoming inactive due to microbial dehydration, while other areas may become overly wet and anaerobic, producing viscous metabolic products and exacerbating caking. Furthermore, the relative movement between the grid and the flow component cleans away microorganisms attached to the grid surface, preventing blockage of the internal pipes. The "L"-shaped design of the flow plate within the flow component further reduces the likelihood of liquid flowing onto the grid surface, thus minimizing the possibility of microbial residue on the grid surface. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] The above and other aspects of the invention will now be described by way of example only, with reference to the accompanying drawings, in which:

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is a front view of the present invention;

[0034] Figure 3 This is the present invention. Figure 2 Axonometric view of the sectional view of section AA in the middle;

[0035] Figure 4 This is the present invention. Figure 2 Sectional view of section AA;

[0036] Figure 5 This is the present invention. Figure 2 Sectional view of the middle BB section;

[0037] Figure 6 This is a side view of the present invention;

[0038] Figure 7 This is the present invention. Figure 6 Cross-sectional view of the CC section;

[0039] Figure 8 This is the present invention. Figure 4 Enlarged view of section A in the middle;

[0040] Figure 9 This is a schematic diagram of the grid structure of the present invention.

[0041] In the picture:

[0042] 1. Decomposition tank; 11. Compartment; 12. Groove; 121. Filter screen;

[0043] 2. Packed bed;

[0044] 3. Ventilation tube;

[0045] 4. Spray nozzle;

[0046] 5. Grid plate; 51. Cavity; 52. Vent; 53. Protrusion; 54. Mating hole;

[0047] 6. Return material tank; 61. Nutrient solution bin; 62. Electrically controlled pump nozzle;

[0048] 7. Motion components; 71. Motor; 72. Chain; 73. Mounting tube; 74. Gear; 75. Cam;

[0049] 8. Flow assembly; 81. Flow plate; 811. Ventilation channel; 82. Fixture;

[0050] 9. Atomizing component; 91. Bioreactor; 911. Detection module; 912. Reflux pump; 92. High-pressure swirl nozzle; 93. Multi-layer baffle. Detailed Implementation

[0051] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0052] like Figures 1 to 9 As shown, a non-filterable biological decomposition waste gas treatment device includes a decomposition tank 1, a packing bed 2, an air duct 3, nozzles 4, grid plates 5, a return tank 6, a motion component 7, a flow component 8, and an atomizing component 9. The packing bed 2 is installed in the middle part of the decomposition tank 1. The packing bed 2 mainly contains inorganic fillers such as volcanic rock and ceramsite, and is filled with microbial carriers such as PC sponge, as well as a mixture of various granular additives (main components include water-retaining agents, nutrient slow-release agents, and adsorbents). The nozzles 4 are evenly installed on the upper inner side of the decomposition tank 1. Multiple grid plates 5 are installed in a linear array at the bottom of the decomposition tank 1, and the distance between adjacent grid plates 5 is less than that between volcanic rock and ceramsite. The minimum particle size of inorganic fillers such as granules is specified. The return tank 6 is located at the lower end of the decomposition tank 1. The decomposition tank 1 has compartments 11 on both sides. The moving component 7 is installed in the compartments 11 and connected to the grid plate 5. The atomizing component 9 is installed at the lower end of the return tank 6. The vent pipe 3 is connected to the bottom end of the atomizing component 9. The return tank 6 recovers the liquid in the decomposition tank 1 and performs preliminary decomposition of the waste gas through the atomizing component 9. After decomposition, the waste gas flows through the grid plate 5 to the packing bed 2 for secondary decomposition before being discharged. The moving component 7 is used to drive the grid plate 5 to move and prevent the packing bed 2 from caking. The flow component 8 prevents the surface of the grid plate 5 from being blocked and guides the liquid to flow into the return tank 6.

[0053] like Figure 7As shown, the atomizing component 9 includes a bioreactor 91, a high-pressure swirl nozzle 92, and a multi-layer baffle 93. The bioreactor 91 is installed at the lower end of the return tank 6. The high-pressure swirl nozzle 92 is installed at the upper end of the bioreactor 91 and is connected to the return tank 6. The multi-layer baffle 93 is installed inside the bioreactor 91, penetrating the interior of the bioreactor 91 and arranged in a crisscross pattern. The bioreactor 91 adopts a gas-liquid countercurrent design, with waste gas entering from the bottom of the bioreactor 91 and the high-pressure swirl nozzle 92 spraying from top to bottom. The high-pressure nozzle operates at a pressure of 4... The pressure is between MPa and 6MPa, which atomizes the microbial solution diluted in the return tank 6 into droplets of 5μm-50μm. The multi-layer baffles 93 are staggered at an angle of 30°-45° to change the gas direction, form turbulence, and extend the gas-liquid contact area. When the gas enters from the lower end of the bioreactor 91, the high-pressure swirl nozzle 92 sprays the diluted microbial solution in the return tank 6 out from the top of the bioreactor 91, so that it can react fully in the bioreactor 91. At the same time, the multi-layer baffles 93 in the bioreactor 91 extend the gas flow path and increase the reaction time.

[0054] like Figure 7 , Figure 8 and Figure 9 As shown, the grid plate 5 has a cavity 51 inside, which is connected to the biological reactor 91. Multiple vents 52 are provided on the outer side of the grid plate 5. These vents 52 are elongated and slope upwards from the inside out, with their inner diameter gradually decreasing from the inside out. Multiple parallel grid plates 5 are arranged at the bottom of the decomposition tank 1, providing sufficient space at the bottom to prevent the bottom of the entire decomposition tank 1 from being completely blocked by inorganic packing, thus hindering the flow of liquid and waste gas. Simultaneously, a cavity 51 is provided inside the grid plate 5, and a pipe is provided at the bottom of the decomposition tank 1 connecting to the biological reactor 91. The cavity 51 is connected to the pipe at the bottom of the decomposition tank 1 via a corrugated expansion joint. After the waste gas undergoes one decomposition in the biological reactor 91, it then undergoes complete decomposition in the decomposition tank 1. Decomposition can prevent excessive microbial growth in the decomposition tank 1 due to excessive waste gas, which could lead to blockage or even caking. Setting the vent 52 as a long strip allows for faster waste gas flow and reduces the risk of blockage. Setting it to slope upwards from the inside out allows the waste gas to clean the surface of adjacent grid plates 5 when it is blown out, preventing microorganisms and their secretions from remaining on the surface of adjacent grid plates 5. It also gives the ejected waste gas an upward initial velocity, which can clean the gaps of inorganic filler accumulated above the grid plates 5. The gradual reduction of the inner diameter of the vent 52 from the inside out further increases this initial velocity by reducing its cross-sectional area, thereby strengthening the cleaning effect on the surface area of ​​adjacent grid plates 5.

[0055] like Figure 2 , Figure 5 and Figure 7 As shown, the motion component 7 includes a motor 71, a chain 72, a mounting tube 73, gears 74, and cams 75. The motor 71 is installed outside the decomposition tank 1, the mounting tube 73 is installed inside the compartment 11, and multiple gears 74 are installed on the mounting tube 73. Circular mating holes 54 are opened on both sides of the grid plate 5, and the cams 75 are installed in the circular mating holes 54. The initial angles of adjacent cams 75 are inconsistent, with each adjacent cam 75 having an initial angle 30 degrees different from the others. The cams 75 penetrate the compartment 11 and are connected to the gears 74. The chain 72 connects the motor 71 and the gears 74. In the above scheme, the motor 71 drives the gears 74 and cams 75 to rotate through the chain 72. Under the drive of the cams 75, the grid plate 5 performs a vertical reciprocating motion in a sine or cosine pattern. Assuming the stroke of the grid plate 5 is H, the height of the vent groove 811 on the flow plate 81 is h1, and the height of the vent 52 on the grid plate 5 is h2. The design parameters ensure that the vent 52 and vent slot 811 completely overlap for 30%-50% of a motion cycle, during which time the gas is ejected. During the remaining time, they are staggered, and the gas passage is blocked by the solid portion of the flow plate 81. At this time, the liquid flows down between adjacent flow plates 81. Because the flow assembly 8 is installed between adjacent grid plates 5, and due to the limiting effect of the flow assembly 8 on the grid plates 5, when the cam 75 rotates, it drives the grid plates 5 up and down through the elliptical mating hole 54. Since the initial angle of each cam 75 is inconsistent, when the motor 71 drives the cam... When rotated 75°, all the grid plates 5 will form a wave-like undulation, causing the inorganic packing at the lower end of the packing bed 2 to move back and forth, preventing the inorganic packing from caking. At the same time, the size of the gap between adjacent inorganic packing will be continuously changed, thereby continuously changing the gas flow channel and preventing uneven airflow. In addition, this setting can make the position of the exhaust gas sprayed from the vent 52 in the grid plate 5 on the cleaning component 8 on the outside of the adjacent grid plate 5 constantly change, thereby achieving the effect of thoroughly cleaning the cleaning component 8 on the outside of the adjacent grid plate 5 and preventing some dead corners on the cleaning component 8 from being unable to be cleaned.

[0056] like Figure 9 As shown, the top of the grid plate 5 is provided with a protrusion 53, the top of the protrusion 53 is round. By providing a protrusion 53 on the surface of the grid plate 5 and setting the top of the protrusion 53 to be elliptical, the effect of preventing the packing bed 2 from caking can be further enhanced. At the same time, the resistance faced by the grid plate 5 when it moves upward can be reduced, thereby reducing the wear of the grid plate 5 during the up and down movement.

[0057] like Figure 8As shown, the flow assembly 8 includes a flow plate 81 and a fixing frame 82. Multiple fixing frames 82 are installed on both sides of the decomposition tank 1. The flow plate 81 is fixed to the fixing frame 82 and is in the shape of an inverted triangle. The distance between adjacent flow plates 81 gradually decreases from bottom to top. When exhaust gas enters the decomposition tank through the space between adjacent flow plates 81, it further accelerates the flow rate of the exhaust gas, increasing the cleaning effect on the pores between the inorganic packing materials. Multiple ventilation grooves 811 corresponding to the ventilation ports 52 are formed on the surface of the flow plate 81. The width of the ventilation grooves 811 is slightly larger than that of the ventilation ports 52. When the vent 52 corresponds to the vent 811, the gas is ejected from the vent 811 and moves into the decomposition tank 1. When the vent 52 does not correspond to the vent 811, the gas cannot flow out. At this time, the liquid can enter the bottom of the decomposition tank 1 along the surface of the flow plate 81, thereby realizing the circulation of the liquid. By setting it up in this way, the flow path of the liquid can be changed by changing the airflow between the two grid plates 5, thereby changing the channel through which the liquid can flow. This can prevent the local area from drying out and causing the microorganisms to dehydrate and become inactive, while the local area becomes too wet and anaerobic, producing viscous metabolites.

[0058] like Figure 3 As shown, a groove 12 is provided at the bottom of the decomposition tank 1. The lowest point of the groove 12 is connected to the return tank 6. A filter screen 121 is provided inside the groove 12. The groove 12 at the bottom of the decomposition tank 1 allows the liquid flowing to the bottom of the decomposition tank 1 to flow quickly into the return tank 6, thereby preventing the liquid from accumulating below the decomposition tank 1. At the same time, the filter screen 121 in the groove 12 can prevent some small pieces of debris from entering the return tank 6.

[0059] like Figure 2 , Figure 4 and Figure 7As shown, a nutrient tank 61 and an electrically controlled pump nozzle 62 are installed on one side of the return tank 6. A detection module 911 is installed at the bottom of the bioreactor 91 where it connects to the ventilation pipe 3. The detection module 911 includes integrated pH sensors, DO meters, VOCs detectors, and other detection instruments for detecting the concentration of pollutants in the exhaust gas. The detection module 911 is electrically connected to the electrically controlled pump nozzle 62. The nutrient tank 61 is filled with nutrients for microbial nutrition. This solution detects the concentration of pollutants in the exhaust gas by using the detection module 911 at the bottom of the bioreactor 91, and injects a corresponding amount of nutrients into the return tank 6 accordingly. This maintains the number of microorganisms in the entire device at a balanced level, avoiding both excessive and insufficient numbers of microorganisms. Compared to the existing technology of adding a large amount of organic matter to the packing bed 2 in biological filters to allow natural reproduction, this invention can better control the number of microorganisms by injecting nutrients. At the same time, the entire device can be operated for a long time by supplementing nutrients, avoiding the problem of needing to replace organic packing materials periodically in the existing technology.

[0060] like Figure 2 , Figure 4 and Figure 7 As shown, a return pump 912 is installed at the bottom of the bioreactor 91. The return pump 912 is connected to the nozzle 4. After the liquid droplets containing microorganisms and nutrients absorb the waste gas once, they will condense at the bottom of the bioreactor 91 and return to the top of the decomposition tank 1 through the return pump 912. Then, they will be sprayed into the decomposition tank 1 through the nozzle 4. At this time, the microorganisms and nutrients in the liquid will replenish the microorganisms on the packing bed 2 and provide them with food to promote their reproduction.

[0061] Working process: This invention recovers the liquid containing microorganisms flowing out of the decomposition tank 1 through the return tank 6 and performs preliminary decomposition of the waste gas through the atomizing component 9 to reduce the pollutant content in the waste gas. The decomposed waste gas is then discharged after passing through the grid plate 5 into the packing bed 2 for secondary decomposition. While cleaning the grid plate 5, it prevents the excessive reproduction of microorganisms. At the same time, the motion component 7 drives the grid plate 5 to move up and down to prevent the packing bed 2 from caking. Then, the flow component 8 is used to prevent the surface of the grid plate 5 from being blocked and guide the liquid containing microorganisms to flow into the return tank 6, forming a complete circulation system.

[0062] Specifically: When gas enters from the lower end of the bioreactor 91, the high-pressure cyclone nozzle 92 sprays the diluted microbial solution from the return tank 6 out from the top of the bioreactor 91, allowing it to react fully within the bioreactor 91. Simultaneously, the multi-layered baffles 93 installed within the bioreactor 91 extend the gas flow path and increase the reaction time. After the waste gas undergoes one decomposition in the bioreactor 91, it is then completely decomposed in the decomposition tank 1. This prevents excessive microbial growth in the decomposition tank 1 due to excessive waste gas, which could lead to blockage or even caking. Meanwhile, when the motor 71 drives the cam 75 to rotate via the chain 72 and gear 74, because the initial angle of each cam 75 is inconsistent, all... The grid plate 5 forms a wave-like undulation, causing the inorganic packing at the lower end of the packing bed 2 to move in an interlaced manner, further preventing the inorganic packing from caking. At the same time, when the vent 52 corresponds to the venting groove 811, the gas is ejected from the venting groove 811 and moves into the decomposition tank 1. When the vent 52 does not correspond to the venting groove 811, the gas cannot flow out. At this time, the liquid can enter the bottom of the decomposition tank 1 along the gap between the adjacent flow plates 81, thereby realizing the circulation of the liquid. Moreover, by setting it up in this way, the liquid flow path can be changed by continuously changing the channels through which the liquid can flow, thereby preventing the problem of local dryness leading to microbial dehydration and inactivation, and local excessive moisture and anaerobic conditions that produce viscous metabolites.

[0063] When the liquid enters the decomposition tank 1 through the nozzle 4, it will cause the microorganisms in the packing bed 2 to flow downwards. At this time, it will enter the return tank 6 through the filter screen 121 at the bottom of the decomposition tank 1. The return tank 6 will appropriately replenish nutrients according to the concentration of pollutants in the waste gas to ensure the number of microorganisms. After the microorganisms have preliminarily purified the waste gas through the biological reaction tank 91, they will be transported to the nozzle 4 by the return pump 912 and sprayed into the packing bed 2 through the nozzle 4 to replenish the number of microorganisms in the packing bed 2 and bring nutrients.

[0064] 1. The technical features disclosed above are not limited to the combination of the disclosed features with other features. Those skilled in the art can also make other combinations of the technical features according to the purpose of the disclosure in order to achieve the purpose of this disclosure.

Claims

1. A non-filterable biological decomposition waste gas treatment device, comprising a decomposition tank (1), a packing bed (2), an air pipe (3), and a nozzle (4), characterized in that... It also includes a grid plate (5), a return tank (6), a motion component (7), a flow component (8), and an atomizing component (9). The packing bed (2) is installed in the middle part of the decomposition tank (1), the nozzle (4) is installed on the upper inner side of the decomposition tank (1), multiple grid plates (5) are installed at the bottom of the decomposition tank (1), the return tank (6) is opened at the lower end of the decomposition tank (1), and compartments (11) are opened on both sides of the decomposition tank (1). The motion component (7) is installed in the compartment (11) and connected to the grid plate (5). The atomizing component (9) The component (9) is installed at the lower end of the return tank (6). The vent pipe (3) is connected to the bottom end of the atomizing component (9). The return tank (6) recovers the liquid in the decomposition tank (1) and performs preliminary decomposition of the waste gas through the atomizing component (9). After decomposition, the waste gas flows through the grid plate (5) to the packing bed (2) for secondary decomposition and then is discharged. The motion component (7) is used to drive the grid plate (5) to move to prevent the packing bed (2) from caking. The flow component (8) is used to prevent the surface of the grid plate (5) from being blocked while guiding the liquid to flow into the return tank (6). The grid plate (5) has a cavity (51) inside, which is connected to the biological reaction tank (91). The grid plate (5) has multiple air vents (52) on its outer side. The air vents (52) are elongated and tilted upward from the inside to the outside. The inner diameter of the air vents (52) gradually decreases from the inside to the outside. The motion component (7) includes a motor (71), a chain (72), a mounting tube (73), a gear (74), and a cam (75). The motor (71) is installed outside the decomposition tank (1). The mounting tube (73) is installed inside the compartment (11). Multiple gears (74) are installed on the mounting tube (73). Elliptical mating holes (54) are provided on both sides of the grid plate (5). The cam (75) is installed inside the elliptical mating holes (54) and passes through the compartment (11) to connect with the gears (74). The chain (72) connects the motor (71) and the gears (74). The initial angle of each cam (75) is inconsistent; When the vent (52) corresponds to the vent (811), the gas is ejected from the vent (811) and moves into the decomposition tank (1). When the vent (52) does not correspond to the vent (811), the gas cannot flow out. At this time, the liquid can enter the bottom of the decomposition tank (1) along the gap between the adjacent flow plates (81).

2. The non-filtering biological decomposition waste gas treatment device according to claim 1, characterized in that: The atomizing component (9) includes: a bioreactor (91), a high-pressure swirl nozzle (92), and a multi-layer baffle (93). The bioreactor (91) is installed at the lower end of the return tank (6), the high-pressure swirl nozzle (92) is installed at the upper end of the bioreactor (91) and is connected to the return tank (6), and the multi-layer baffle (93) is installed inside the bioreactor (91).

3. The non-filtering biological decomposition waste gas treatment device according to claim 1, characterized in that: The top of the grid plate (5) is provided with a protrusion (53), and the top of the protrusion (53) is elliptical.

4. The non-filtering biological decomposition waste gas treatment device according to claim 1, characterized in that: The flow assembly (8) includes a flow plate (81) and a fixing frame (82). Multiple fixing frames (82) are installed on both sides of the decomposition tank (1). The flow plate (81) is fixed on the fixing frame (82) and the flow plate (81) is "L" shaped. Multiple ventilation grooves (811) corresponding to the ventilation ports (52) are opened on the surface of the flow plate (81). The width of the ventilation grooves (811) is slightly larger than that of the ventilation ports (52).

5. The non-filtering biological decomposition waste gas treatment device according to claim 1, characterized in that: The decomposition tank (1) has a groove (12) at the bottom, the lowest point of the groove (12) is connected to the return tank (6), and a filter screen (121) is provided inside the groove (12).

6. The non-filtering biological decomposition waste gas treatment device according to claim 2, characterized in that: The nutrient tank (61) and the electric pump nozzle (62) are installed on one side of the return tank (6). The detection module (911) is installed at the connection between the bottom of the bioreactor (91) and the air pipe (3). The detection module (911) is electrically connected to the electric pump nozzle (62).

7. The non-filtering biological decomposition waste gas treatment device according to claim 2, characterized in that: A reflux pump (912) is installed at the bottom of the bioreactor (91), and the reflux pump (912) is connected to the nozzle (4).

Images