CN214862518U

CN214862518U - Movable biological filter bed and biological purification system

Info

Publication number: CN214862518U
Application number: CN202120916489.2U
Authority: CN
Inventors: 孙绍堂
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2021-11-26
Anticipated expiration: 2031-04-29

Abstract

The utility model relates to a portable biological filter bed and biological purification system, this portable biological filter bed includes: the box body is provided with a purifying chamber, and an air inlet and an air outlet which are communicated with the purifying chamber, and the air flows through the air inlet, the purifying chamber and the air outlet in sequence; the device comprises a mobile device and a gas outlet, wherein the mobile device comprises at least two mobile mesh zones which are arranged at intervals along the height direction of a purification chamber, a biological filler layer is placed on the mobile mesh zones, the mobile mesh zones periodically rotate, the biological filler layer on the upper mobile mesh zone can fall onto the lower mobile mesh zone in every two adjacent mobile mesh zones, gas flows from one end of the mobile device close to the gas inlet to one end of the mobile device close to the gas outlet, and the biological filler layer purifies the gas; and the material moving device receives the biological filler layer positioned on the lowermost moving mesh belt and transports the biological filler layer to the uppermost moving mesh belt. The movable biological filter bed has the characteristic of high gas purification efficiency.

Description

Movable biological filter bed and biological purification system

Technical Field

The utility model relates to a biological purification technical field especially relates to a portable biological filter bed and biological purification system.

Background

Due to the technical characteristics and advantages of biological deodorization, the biological deodorization technology has been rapidly developed in China in the last two decades, has a wider and wider application range, and has become a second choice for the treatment of odor purification waste gas in various industries. At present, the fixed biological filter bed is basically adopted in the application of biological deodorization in waste gas treatment. The fixed biological filter bed has three disadvantages: firstly, along with the increase of the operation time, the packing layer is gradually compacted, the biological membrane is thicker and thicker, and the void ratio of the packing layer is lower and lower; secondly, biological films among particles of the packing layer are mutually bonded, so that the effective surface area of the packing layer is reduced, and the contact surface of the biological films and waste gas is reduced; thirdly, metabolites in the microbial decomposition process cannot be discharged, and the fallen biomembrane blocks channels among particles of the packing layer, so that the circulation of waste gas is not smooth. Thereby decreasing the purification efficiency of the fixed biofilter bed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a portable biological filter bed and biological purification system, its purification efficiency is high.

To achieve the purpose, the utility model adopts the following technical proposal:

there is provided a mobile biofilter bed comprising:

the gas purification device comprises a box body, a gas inlet and a gas outlet, wherein the box body is provided with a purification chamber, and the gas inlet and the gas outlet are communicated with the purification chamber;

the mobile device is arranged in the purification chamber and comprises at least two mobile mesh zones arranged at intervals along the height direction of the purification chamber, a biological filler layer is placed on the mobile mesh zones, the mobile mesh zones periodically rotate, the biological filler layer on the mobile mesh zone above the mobile mesh zone below the mobile mesh zone, the gas flows from one end of the mobile device close to the gas inlet to one end of the mobile device close to the gas outlet, and the biological filler layer on each mobile mesh zone purifies the gas;

and the material moving device is used for receiving the biological filler layer on the moving mesh belt positioned at the lowest part and transporting the biological filler layer to the moving mesh belt positioned at the uppermost part.

Further, it is provided with the through-hole that supplies the gas circulation to remove the mesh area, gas passes through the through-hole is followed it is close to remove the mesh area one side flow to being close to the one side of gas outlet.

Furthermore, a baffle is arranged on the side wall of the purifying chamber and used for shielding a gap between the side wall of the purifying chamber and the movable mesh belt.

Further, when the mobile mesh zones rotate, the biological filler layer moves from the front end to the rear end of the mobile mesh zone, and the front end of the mobile mesh zone positioned below in two adjacent mobile mesh zones can receive the biological filler layer falling from the rear end of the mobile mesh zone positioned above.

Further, it includes drive assembly and hopper to move the material device, the drive assembly drive the hopper is being located the below the rear end in removal mesh area with be located the top move between the front end in removal mesh area, so that the hopper receives to be located the below the rear end in removal mesh area the bio-packing layer and transport to being located the top the front end in removal mesh area.

Furthermore, the driving assembly comprises a screw rod arranged on the box body and a connecting part arranged on the hopper, the screw rod is in threaded connection with the connecting part, and the hopper is driven to move along the length direction of the screw rod through the rotation of the screw rod.

Further, a raking device is arranged above the movable mesh belt and used for adjusting the thickness of the biological filler layer.

Furthermore, a heat insulation layer is arranged on the side wall of the box body.

Further, still include the air current uniform distributor, the air current uniform distributor install in the air inlet, the air current uniform distributor is followed the length direction in removal mesh area sets up, follows the length direction of air current uniform distributor, the air current uniform distributor interval is provided with a plurality of gas pockets that supply the gas circulation.

The biological purification system comprises the mobile biological filter bed and a gas pretreatment device, wherein the gas pretreatment device is used for humidifying and/or filtering the gas entering the purification chamber.

The utility model discloses compare in prior art's beneficial effect:

the utility model discloses a portable biological filter bed and biological purification system, set up a plurality of removal mesh areas through the interval in the clean room, but remove the mesh area and periodically rotate, so that the bio-packing layer that removes on the mesh area moves to the below from mobile device's top in proper order, in two adjacent removal mesh areas, the in-process in the removal mesh area that falls into the below at bio-packing layer from the removal mesh area of top, take place position change and become loose by the compact bio-packing layer, the biomembrane that bonds together is torn, and then increase bio-packing layer's void fraction, guarantee biomembrane and gaseous contact surface, improve bio-packing layer's purification efficiency.

Drawings

FIG. 1 is a front view of a mobile biological filter bed of an embodiment.

FIG. 2 is a side view of an embodiment of a mobile biological filter bed.

In the figure:

1. a box body; 10. a clean room; 11. adjusting the sealing plate; 12. a material blocking sealing plate; 2. a mobile device; 21. a rotating wheel; 22. moving the mesh belt; 23. a support member; 3. a material moving device; 31. a screw; 32. a drive motor; 33. lifting the hopper; 331. a connecting portion; 34. a movable discharging hopper; 4. an airflow uniform distributor; 5. an air outlet; 6. a biological filler layer; 7. and (4) a spraying device.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

As shown in fig. 1 and fig. 2, the utility model provides a mobile biological filter bed, which comprises a box body 1, a mobile device 2 and a material moving device 3. Wherein, box 1 plays the whole supporting role, and box 1 provides the installation position and the waste gas purification processing's space that is used for installing mobile device 2 and material moving device 3. The box 1 is the cavity structure, and box 1 is provided with clean room 10, air inlet and gas outlet 5, and air inlet and gas outlet 5 all communicate with clean room 10, and air inlet and gas outlet 5 are used for being connected with the pipeline of conveying gas to make gas flow through air inlet, clean room 10 and gas outlet 5 in proper order. The mobile device 2 is used for loading and conveying the biological filler layer 6, the mobile device 2 is arranged in the purification chamber 10, the mobile device 2 comprises at least two mobile mesh belts 22 which are arranged along the height direction of the purification chamber 10 at intervals, the biological filler layer 6 is placed on the mobile mesh belts 22, and the mobile mesh belts 22 can rotate periodically. When the mobile mesh belt 22 does not rotate, the biological filler layer 6 is statically placed on the mobile mesh belt 22; when the moving mesh belt 22 rotates, the bio-filler layer 6 moves in the advancing direction of the moving mesh belt 22, and the bio-filler layer 6 moves from one end of the moving mesh belt 22 to the other end. So that the bio-filler layer 6 on the moving mesh belt 22 located above can fall on the moving mesh belt 22 located below in two adjacent moving mesh belts 22. It should be noted that the biological filler layer 6 is composed of a plurality of biological fillers in block or particle shape, and when the moving mesh belt 22 moves, the biological fillers quantitatively fall from the moving mesh belt 22 located above to the moving mesh belt 22 located below. The purpose is to make the biological filler fall into the movable mesh belt 22 below and then be in a uniform flat state, which is beneficial to purifying the gas. After entering from the air inlet, the gas flows from the end of the mobile device 2 close to the air inlet to the end close to the air outlet 5 along the height direction of the purification chamber 10, that is, the gas passes through the biological filler layer 6 on each mobile mesh zone 22 in turn, and the biological filler layer 6 on each mobile mesh zone 22 purifies the passing gas. The purpose of the transfer device 3 is to transport the bio-filler layer 6, the transfer device 3 receiving the bio-filler layer 6 on the lowermost moving mesh belt 22 and transporting the bio-filler layer 6 to the uppermost moving mesh belt 22. Realizing the circular motion of the biological filler layer 6 at the two ends of the mobile device 2.

It is understood that the gas is waste gas from municipal sewage plants, refuse treatment plants, coating plants, chemical production, feed, food processing, pharmaceutical plants, etc., and the waste gas includes various harmful, toxic, and irritating pollutants. Biological deodorization is the prior art, and mainly adopts a biological method to purify waste gas through a microbial film which is specially cultured on a biological filler layer 6, and utilizes metabolism of microbial strains which grow on the biological filler layer 6 to degrade pollutants in the waste gas, thereby realizing the purification of the waste gas.

And, periodic rotation of the moving mesh belt 22 may also be understood as intermittent rotation of the moving mesh belt 22. Namely, the mobile device 2 has two working states, when in the first working state, the mobile mesh belt 22 is static, the biological filler layer 6 is placed on the mobile mesh belt 22, and the gas flows from one end of the mobile device 2 to the other end and carries out biodegradation reaction with the biological filler layer 6 on each mobile mesh belt 22 in sequence, so as to realize the purification treatment of the gas; in the second operating state, the mobile mesh belt 22 rotates, the bio-filler layer 6 moves from one end of the mobile mesh belt 22 to the other end along with the rotation of the mobile mesh belt 22 and falls onto the mobile mesh belt 22 located below the mobile mesh belt, the bio-filler layer 6 located on the mobile mesh belt 22 located at the lowest position of the mobile device 2 falls into the material moving device 3, and the material moving device 3 transports the bio-filler layer 6 back to the mobile mesh belt 22 located at the highest position of the mobile device 2. In the process, the gas flows from one end to the other end of the mobile device 2, namely, the gas passes through each mobile mesh zone 22 layer by layer from the mobile mesh zone 22 positioned at the lowest part to the mobile mesh zone 22 at the highest part, and is subjected to biodegradation reaction with the biological filler layer 6 on each mobile mesh zone 22 in sequence, so that the purification treatment of the gas is realized. In two adjacent mobile mesh zones 22, the bio-filler layer 6 on the mobile mesh zone 22 above falls into the mobile mesh zone 22 below, and in the falling process of the bio-filler layer 6, the compacted bio-filler layer 6 changes in position and becomes loose, increasing the gap for gas circulation in the bio-filler layer 6, and further ensuring the porosity of the bio-filler layer 6. Meanwhile, in the falling process of the biological filler layer 6, the biological film adhered together is torn, and the contact area of the biological film and the waste gas is ensured. When the microbial metabolite in the biological filler layer 6 reaches a set value, the material moving device 3 can convey the collected biological filler layer 6 out of the purification chamber 10, and add a new biological filler layer 6 to update and replace the biological filler layer 6, and finally ensure the purification efficiency of the biological filler layer 6.

In the present embodiment, referring to fig. 1, the moving device 2 includes six moving mesh belts 22 arranged at intervals in the vertical direction, the gas inlet is located below the clean room 10, and the gas outlet 5 is located above the clean room 10, i.e. the gas enters from the gas inlet, flows from below the clean room 10 to above the clean room 10, and finally is discharged through the gas outlet 5. From the lower end to the upper end of the mobile device 2, the gas passes through each mobile mesh zone 22 in turn and undergoes biodegradation with the bio-filler layer 6 on the mobile mesh zone 22. When the mobile mesh belts 22 rotate, the biological filler layer 6 sequentially passes through each mobile mesh belt 22 from top to bottom, finally falls into the material moving device 3, and the material moving device 3 transports the biological filler layer to the mobile mesh belt 22 positioned at the top, so that the biological filler layer 6 circularly moves at the upper end and the lower end of the mobile device 2. The moving mesh belt 22 is provided with through holes for the circulation of gas, through which gas flows from the side of the moving mesh belt 22 near the gas inlet to the side near the gas outlet 5. Namely, after the gas enters the purifying chamber 10 from the gas inlet, the gas flows from the lower part to the upper part of the moving mesh belt 22 through the through holes, passes through the gap inside the biological filler layer 6, and performs a biological degradation reaction with the biological membrane. Of course, in other embodiments, the specific number of moving mesh belts 22 may be selected accordingly based on the technical criteria of gas flow, pollutant content, efficiency of microbial degradation, etc.

Specifically, the mobile biofilter bed further comprises a spraying device 7, and the spraying device 7 is used for spraying water to the mobile device 2. Spray set 7 includes spray pipe, water pump and shower nozzle, and the shower nozzle is a plurality of, and a plurality of shower nozzles interval distribution form the cistern in mobile device 2's top, and the bottom of clean room 10 gathers in the cistern after spraying the water that flows down. The spray pipe is used for connecting the reservoir and the spray head, the water pump is used for providing power, and water in the reservoir is conveyed to the spray head through the spray pipe after being filtered, so that the water can be recycled. Meanwhile, microorganisms in the biological filler layer 6 are metabolized to generate fallen biological membranes, and after the biological filler layer 6 from the lowermost mobile mesh belt 22 is received by the material moving device 3, the material moving device 3 moves downwards and is immersed in water, and then is conveyed to the uppermost mobile mesh belt 22. The fallen biological membrane is dissolved in water, and the automatic cleaning of the fallen biological membrane is realized.

In particular, the movement device 2 further comprises a wheel 21 and a support 23. Two ends of the movable mesh belt 22 are respectively sleeved on the two rotating wheels 21, and the movable mesh belt 22 is driven to rotate by the rotation of the rotating wheels 21. A plurality of supporting pieces 23 are arranged at intervals on one side of the moving mesh belt 22, which faces away from the biological filler layer 6, and the supporting pieces 23 are used for supporting the moving mesh belt 22 and the biological filler layer 6.

Specifically, a baffle plate is disposed on a sidewall of the clean room 10, and the baffle plate is used for blocking a gap between the sidewall of the clean room 10 and the moving mesh belt 22. In this embodiment, the mobile mesh belts 22 are spaced from the side walls of the purification chamber 10, and the gaps between the side walls and the mobile mesh belts 22 are shielded by the baffles, so as to prevent the gas at the lower part of the purification chamber 10 from directly flowing upwards through the gaps, and further to force the gas at the lower part of the purification chamber 10 to sequentially pass through each mobile mesh belt 22 and flow upwards, thereby ensuring that the gas contacts with the bio-filler layer 6. For guaranteeing the motion of biological packing layer 6, the baffle divide into adjusts closing plate 11 and keeps off material closing plate 12, the blanking position correspondence of moving mesh area 22 is provided with adjusts closing plate 11, adjust closing plate 11 movable mounting on the lateral wall of clean room 10, when not needing the blanking, adjust closing plate 11 and shelter from the clearance between moving mesh area 22 and the lateral wall, when needs blanking, adjust closing plate 11 and open under the thrust effect and the action of gravity when biological packing layer 6 falls, for biological packing layer 6 falls. Other positions of the mobile mesh zone 22 are provided with the material blocking sealing plates 12, and gaps between the mobile mesh zone 22 and the side walls are blocked by the material blocking sealing plates 12, so that gas is prevented from directly flowing through and falling off from two sides of the mobile mesh zone 22 in the motion process of the biological packing layer 6 on the mobile mesh zone 22.

Specifically, the direction indicated by the arrow in fig. 1 is the direction of movement of the moving mesh belt 22. When the moving mesh belt 22 rotates, the biological filler layer 6 moves from the front end to the rear end of the moving mesh belt 22, and the front end of the moving mesh belt 22 located below in two adjacent moving mesh belts 22 can receive the biological filler layer 6 falling from the rear end of the moving mesh belt 22 located above. In this embodiment, the moving device 2 is a first moving mesh zone, a second moving mesh zone, a third moving mesh zone, a fourth moving mesh zone, a fifth moving mesh zone, and a sixth moving mesh zone in sequence from top to bottom, the front end of the first moving mesh zone receives the bio-filler layer 6 from the moving device 3, the bio-filler layer 6 moves from the front end of the first moving mesh zone to the rear end and drops from the rear end to the front end of the second moving mesh zone along with the rotation of the first moving mesh zone, the bio-filler layer 6 moves from the front end of the second moving mesh zone to the rear end and drops from the rear end to the front end of the third moving mesh zone, and so on. Finally, the biological filler layer 6 falls into the material moving device 3 from the rear end of the sixth mobile mesh zone. In order to ensure that the biological filler layer 6 falls down smoothly, in two adjacent moving mesh belts 22, the distance between the rear end of the moving mesh belt 22 positioned above and the side wall of the corresponding purification chamber 10 is L1, the distance between the front end of the moving mesh belt 22 positioned below and the side wall of the corresponding purification chamber 10 is L2, and L1 is greater than L2. It is also understood that the rear end of the moving mesh belt 22 located above is projected on the moving mesh belt 22 located below in the inside of the moving mesh belt 22 located below, of the two adjacent moving mesh belts 22. This configuration ensures that the bio-filler layer 6 on the upper moving mesh belt 22 falls smoothly onto the lower moving mesh belt 22.

Specifically, the material moving device 3 includes a driving assembly and a hopper, the driving assembly drives the hopper to move between the rear end of the lowermost moving mesh belt 22 and the front end of the uppermost moving mesh belt 22, so that the hopper receives the bio-filler layer 6 at the rear end of the lowermost moving mesh belt 22 and transports to the front end of the uppermost moving mesh belt 22. In this embodiment, the driving assembly includes a screw 31 disposed on the box 1 and a connecting portion 331 disposed on the hopper, the screw 31 is in threaded connection with the connecting portion 331, and the hopper is driven to move along the length direction of the screw 31 by the rotation of the screw 31. Of course, in other embodiments, other driving devices for driving the hopper to transport the bio-packing layer 6 may be used, such as a winch, a rack and pinion driving mechanism, a wheel driving mechanism, and the like. Referring to fig. 1 and 2, there are two screws 31, and the two screws 31 are spaced apart from each other in the width direction of the case 1. The hopper has two, and two hoppers are hopper 34 and promotion hopper 33 under the portable respectively, and hopper 34 sets up in the top of box 1 under the portable, and hopper 34 can horizontal migration under the portable. The two ends of the lifting hopper 33 are provided with connecting parts 331, the screw rods 31 penetrate through the corresponding connecting parts 331 and are in threaded connection with the connecting parts 331, the end parts of the screw rods 31 are connected with the driving motor 32, and the driving motor 32 drives the screw rods 31 to rotate around the axes of the screw rods 31. When the screw 31 rotates, the lifting hopper 33 moves along the length direction of the screw 31, so that the lifting hopper 33 receives the bio-filler layer 6 from the bottom of the mobile device 2 and then transports to the top of the mobile device 2, and the mobile lower hopper 34 receives the bio-filler layer 6 in the lifting hopper 33 and transports the bio-filler layer 6 to the front end of the first mobile mesh zone for blanking.

Specifically, a raking device is arranged above the moving mesh belt 22, and the raking device is used for adjusting the thickness of the biological filler layer 6. It can be understood that the raking device is used for scraping the biological filler layer 6 on the moving mesh belt 22, so that the thickness of the biological filler layer 6 is uniform, and the gas purification efficiency is ensured. Simultaneously, the one end of raking device orientation removal mesh area 22 still is provided with the rake teeth, and the rake teeth can insert bio-packing layer 6 to turn bio-packing layer 6 through the rake teeth, avoid bio-membrane of bio-packing layer 6 to bond together, improve bio-packing layer 6's void fraction, guarantee purification efficiency.

Specifically, the side wall of the box body 1 is provided with a heat insulation layer. It will be appreciated that the cultivation of microorganisms on the bio-filler layer 6 requires suitable environmental issues. For the areas with lower environmental temperature or larger day and night temperature difference, the side wall of the box body 1 can adopt a double-layer structure, and the interlayer is filled with heat-insulating materials, so that the influence of the environmental temperature on the biological filler layer 6 is reduced.

Specifically, this portable biological filter bed still includes air flow uniform distributor 4, and air flow uniform distributor 4 installs in the air inlet, and air flow uniform distributor 4 sets up along the length direction of removing mesh area 22, and along the length direction of air flow uniform distributor 4, air flow uniform distributor 4 interval is provided with a plurality of gas pores of supplying the gas circulation. In this embodiment, the gas flow distributor 4 is connected with a pipeline for conveying gas, the gas flow distributor 4 is located below the sixth moving mesh belt, and the gas flow distributor 4 is parallel to the sixth moving mesh belt. The periphery of the gas flow distributor 4 is provided with a plurality of gas holes, and gas enters the purifying chamber 10 through the gas holes. Through setting up the even flow direction mobile device 2 that can make gaseous even of air distributor 4, be favorable to making the gas concentration of bio-packing layer 6 each position close.

Specifically, the gas outlet 5 is provided with a fan by which the gas in the clean room 10 is driven to be discharged.

The remarkable effects of the embodiment are as follows: through set up a plurality of removal mesh areas 22 at the interval in clean room 10, removal mesh area 22 can be periodically rotated, so that the biological packing layer 6 on the removal mesh area 22 moves to the below from mobile device 2's top in proper order, in adjacent two removal mesh areas 22, in biological packing layer 6 falls into the in-process of removal mesh area 22 of below from the removal mesh area 22 of top, take place position change and become loose by compacted biological packing layer 6, the biomembrane that the bonding is in the same place is torn, and then increase biological packing layer 6's void fraction, guarantee the contact surface of biomembrane and gas, improve biological packing layer 6's purification efficiency.

Also provided is a biological purification system comprising the mobile biological filter bed and a gas pretreatment device, wherein the gas pretreatment device is used for humidifying and/or filtering the gas entering the purification chamber 10. It will be appreciated that the degradation reaction of the bio-filler layer 6 with the gas requires a certain humidity and therefore the gas is humidified before being introduced into the clean room 10 at a location where the gas is dry. And, for the gas containing solid impurities, the gas may be filtered before being input into the clean room 10 to remove the solid impurities in the gas. This biological purification system adopts the biological filter structure of transferring, can guarantee the clearance rate of bio-packing layer 6, and then guarantees gaseous purification efficiency.

And a biological purification method is also provided, wherein a mobile device 2 used for placing and conveying a biological filler layer 6 is provided, the mobile device 2 comprises a plurality of mobile mesh belts 22 arranged at intervals along the vertical direction, the biological filler layer 6 falls into the mobile mesh belt 22 positioned at the lowest part from the mobile mesh belt 22 positioned at the top in sequence, gas passes through the mobile mesh belts 22 in sequence, and the biological filler layer 6 on each mobile mesh belt 22 purifies the gas. In this embodiment, the moving mesh belt 22 moves in the horizontal direction, and the bio-filler layer 6 placed on the moving mesh belt 22 moves from the front end to the rear end of the moving direction of the mesh belt 22 by the rotation of the moving mesh belt 22, and the rotation directions of the adjacent two moving mesh belts 22 are opposite, so that the bio-filler layer 6 on the moving mesh belt 22 located above can fall down onto the moving mesh belt 22 located below in the adjacent two moving mesh belts 22. From the lowest part to the uppermost part of the mobile device 2, the gas sequentially passes through each mobile mesh zone 22 and carries out biodegradation reaction with the biological filler layer 6 on each mobile mesh zone 22, and purification treatment of the gas is realized. In the process, as the biological filler layer 6 can move along the movable mesh belt 22 and fall, the compacted biological filler layer 6 changes position and becomes loose, the biological membrane adhered together is torn, the porosity of the biological filler layer 6 is increased, and the purification efficiency of the biological filler layer 6 is improved.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A mobile biofilter bed, comprising:

2. The mobile biofilter bed according to claim 1, wherein said moving mesh belt is provided with through holes for the passage of gas therethrough from a side of said moving mesh belt adjacent to said gas inlet to a side adjacent to said gas outlet.

3. The mobile biofilter bed according to claim 2, wherein a baffle is provided on a side wall of said clean room for blocking a gap between the side wall of said clean room and said moving mesh belt.

4. The mobile biofilter bed according to claim 1, wherein said layer of bio-filler moves from a front end to a rear end in a moving direction of said moving mesh belt when said moving mesh belt rotates, and a front end of a lower moving mesh belt of adjacent two of said moving mesh belts is capable of receiving said layer of bio-filler dropped from a rear end of an upper moving mesh belt.

5. The mobile biofilter bed according to claim 4, wherein said material mover comprises a drive assembly and a hopper, said drive assembly driving said hopper to move between a rear end of said lowermost moving mesh belt and a front end of said uppermost moving mesh belt such that said hopper receives said layer of bio-filler at the rear end of said lowermost moving mesh belt and transports to the front end of said uppermost moving mesh belt.

6. The mobile biofilter bed according to claim 5, wherein said drive unit comprises a screw rod provided on said housing and a connecting portion provided on said hopper, said screw rod being threadedly connected to said connecting portion, said hopper being driven to move in a length direction of said screw rod by rotation of said screw rod.

7. The mobile biofilter bed according to claim 1, wherein raking means are provided above the mobile mesh belt for adjusting the thickness of the bio-filler layer.

8. The mobile biofilter bed according to claim 1, wherein the side walls of said box body are provided with insulation.

9. The mobile biofilter bed according to claim 1, further comprising an air flow distributor, said air flow distributor being mounted to said air inlet, said air flow distributor being disposed along the length direction of said mobile mesh zone, along the length direction of said air flow distributor, said air flow distributor being spaced apart from a plurality of air holes for the circulation of air.

10. A biological purification system comprising a mobile biological filter bed according to any one of claims 1 to 9, further comprising gas pre-treatment means for humidification and/or filtration of the gas entering the purification chamber.