阅读说明：本技术 一种延长生物滤料使用周期的废气处理设备及其使用方法 (Waste gas treatment equipment for prolonging service cycle of biological filter material and use method thereof ) 是由 俞梁 俞觊觎 郑洪星 周呈祥 胡叔铭 于 2021-09-27 设计创作，主要内容包括：本发明公开了一种延长生物滤料使用周期的废气处理设备及其使用方法,包括生物滤料系统,该生物滤料系统包括：用于盛装生物滤料的旋转网筒,旋转网筒,位于旋转网筒内的空心转轴及轴身上均布有气体喷嘴。装料时,通过旋转网筒内的螺旋导板、进出料仓门填装生物滤料；卸料时通过旋转网筒内的螺旋导板将生物滤料从环形端面的环孔和进出料仓门排出；需要疏松生物滤料时,利用软管喷出的高压喷水打散并冲洗板结的生物滤料。本发明能够降低工作强度,提高装卸效率5-10倍；有效利用生物滤料净化作用,预防滤料板结,延长生物滤料使用时间,进一步提高了除臭效果,保护环境。同时还能够降低除臭过程中的能耗。(The invention discloses a waste gas treatment device for prolonging the service cycle of a biological filter material and a use method thereof, wherein the waste gas treatment device comprises a biological filter material system, and the biological filter material system comprises: the rotary screen cylinder is used for containing biological filter materials, and the hollow rotating shaft and the shaft body in the rotary screen cylinder are uniformly provided with gas nozzles. When charging, biological filter materials are charged through a spiral guide plate and a charging and discharging bin door in the rotary screen cylinder; when in unloading, the biological filter material is discharged from the annular hole of the annular end surface and the feeding and discharging bin door through the spiral guide plate in the rotary screen cylinder; when the biological filter material needs to be loosened, the hardened biological filter material is scattered and washed by high-pressure water sprayed from the hose. The invention can reduce the working strength and improve the loading and unloading efficiency by 5-10 times; effectively utilizes the purification effect of the biological filter material, prevents the hardening of the filter material, prolongs the service life of the biological filter material, further improves the deodorization effect and protects the environment. Meanwhile, the energy consumption in the deodorization process can be reduced.)

1. The utility model provides an extension biological filter material life cycle's exhaust-gas treatment equipment, is including the biological filter material system that is used for purifying the foul smell, its characterized in that, biological filter material system sets up in a sealed cover body (1), and this biological filter material system includes: the rotary screen cylinder (4) is used for containing biological filter materials, annular end faces (4-5) at two ends of the rotary screen cylinder (4) are fixedly arranged on the hollow rotating shaft (4-3) through corresponding detachable structures, gas nozzles (4-3-1) are uniformly distributed on a shaft body of the hollow rotating shaft (4-3) positioned in the rotary screen cylinder (4), one end of the hollow rotating shaft (4-3) is plugged, the other end of the hollow rotating shaft is opened, the plugged end of the hollow rotating shaft (4-3) is lower than the opened end, so that two ends of the rotary screen cylinder (4) have height difference, the opened end is communicated with an odor source pipeline through a rotary joint, a spiral guide plate (4-2) is arranged on the inner wall of the rotary screen cylinder (4) along the axial direction, and a material inlet and outlet door (4-1) is arranged on the wall at the higher end of the rotary screen cylinder (4); the detachable structure includes: a detachable ring (4-6) sealed outside the ring hole of the annular end face (4-5), a first sealing ring is arranged between the annular end face (4-5) and the detachable ring (4-6), a gap is arranged between the ring hole of the detachable ring (4-6) and the hollow rotating shaft (4-3), a stop ring (4-7) is arranged on the inner side of the detachable ring (4-6), a second sealing ring is arranged between the stop ring (4-7) and the detachable ring (4-6), a ring hole of the stop ring (4-7) is fixedly and hermetically connected with the hollow rotating shaft (4-3), two ends of the hollow rotating shaft (4-3) are fixed on the support (3) through corresponding bearings, and the motor (M1) is in transmission connection with a gear arranged at the opening end of the hollow rotating shaft (4-3) through a gearbox (7); the humidifying system (2) is also arranged and used for humidifying the biological filter material, the humidifying system (2) consists of a water tank (2-1), a water pump (M2) arranged in the water tank (2-1), a water pipe (2-2) and a plurality of spiral spray heads (2-3) arranged on the water pipe (2-2), and the spiral spray heads (2-3) are arranged in a line and are positioned above the rotary screen cylinder (4); the water tank (2-1) is provided with a water inlet pipe (2-4) and a water tank blow-off pipe (2-6), the water inlet pipe (2-4) is provided with a water inlet valve (2-5), the water tank blow-off pipe (2-6) is provided with a blow-off valve (2-7), the water tank (2-1) is provided with a transmission pipe (2-10), the transmission pipe (2-10) is connected with the water pipe (2-2), the transmission pipe (2-10) is provided with a three-way valve (2-8), the middle outlet of the three-way valve (2-8) is connected with a bypass pipe (2-9), and the outlet of the bypass pipe (2-9) is connected with a hose; the water pump (M2) and the motor (M1) are both electrically connected with the circuit controller through corresponding leads.

2. The method for using the waste gas treatment equipment for prolonging the service cycle of the biological filter material in claim 1, which is characterized by comprising the following steps:

when the biological filter material is charged, firstly removing a top plate and a side plate of the cover body (1), opening a detachable ring (4-6) at the higher end of the rotary screen cylinder (4), pouring the biological filter material from a ring hole of an annular end face (4-5) at one opened side, starting a motor (M1), pushing the biological filter material to the other end of the rotary screen cylinder (4) through a spiral guide plate (4-2) in the rotary screen cylinder (4), charging the biological filter material until the biological filter material cannot be charged, stopping the machine, and closing the detachable ring (4-6); starting a motor (M1) to rotate the material inlet and outlet bin door (4-1) to the upper part, opening the material inlet and outlet bin door (4-1), filling biological filter materials from the material inlet and outlet bin door (4-1), filling the rotary screen cylinder (4), and closing the material inlet and outlet bin door (4-1);

when unloading, firstly removing the top plate and the side plate of the cover body (1), opening the detachable ring (4-6) at the higher end of the rotary screen cylinder (4), opening the material inlet and outlet bin door (4-1), starting the motor (M1), and discharging the biological filter material from the annular hole of the annular end surface (4-5) and the material inlet and outlet bin door (4-1) through the spiral guide plate (4-2) in the rotary screen cylinder (4);

when the hardening occurs in the operation process and the biological filter material needs to be loosened, the operation steps are as follows:

firstly, detaching a top plate and a side plate of a cover body (1), opening a detachable ring (4-6) at one end, starting a motor (M1), and discharging a part of the biological filter material from a ring hole of an annular end face (4-5) through a spiral guide plate (4-2) in a rotary screen cylinder (4) to reserve a certain space; switching a three-way valve (2-8) of the humidifying system (2) to a bypass pipe (2-9), connecting a hose to an outlet of the bypass pipe (2-9), enabling a water outlet of the hose to face an annular hole of an annular end face (4-5), opening a water pump (M2) of the humidifying system (2), starting a motor (M1), scattering and washing hardened biological filter materials by using high-pressure water sprayed by the hose, and then directly washing the biological filter materials in the rotary screen cylinder (4); and the biological filter material discharged before is stored by a net sheet or a net bag, fine impurities and biological films in the biological filter material are removed by high-pressure leaching of the biological filter material, and finally the leached biological filter material is filled in a rotary net cylinder (4).

3. The method of using an exhaust treatment device to extend the life of a biofilter according to claim 2, wherein: the cover body (1) is a closed space, odor to be purified enters the hollow rotating shaft (4-3) from an odor source pipeline, is discharged from the gas nozzle (4-3-1), is purified by a biological filter material layer formed by the biological filter material, is discharged from meshes of the rotary screen cylinder (4), and is finally discharged to a lower-level treatment device or a discharge cylinder from an exhaust port (1-2) in the middle of the cover body (1) through a pipeline; the sewage in the cover body (1) is discharged from a sewage discharge pipe (1-1) at the bottom.

4. The method of using an exhaust treatment device to extend the life of a biofilter according to claim 3, wherein: the biological filter material is activated carbon, or ceramsite, or volcanic rock, or composite polyurethane spherical filler.

5. The method of using an exhaust treatment device to extend the life of a biofilter according to claim 4, wherein: the rotary net drum (4) is formed by enclosing a mesh plate, and a plurality of net drum supports (4-4) are arranged in the rotary net drum (4).

6. The method of using an exhaust treatment device to extend the life of a biofilter according to claim 5, wherein: the diameter of the small hole on the rotary screen cylinder (4) is 8-15 mm; the gas nozzle (4-3-1) on the shaft body of the hollow rotating shaft (4-3) is in a convex frustum shape, the height of the frustum is 8-20 mm, and the diameter of a gas hole at the top end is 3-5 mm.

7. The method of using an exhaust treatment device to extend the life of a biofilter according to claim 6, wherein:

after the rotary screen cylinder (4) is filled with biological filter materials, biological strains and culture media are added into the water tank (2-1), and the biological strains and the culture media are sprayed into the rotary screen cylinder (4) through the humidifying system and then enter the biological filter materials; then, controlling the air input of the odor to be purified to be 5% of the rated design amount, spraying a proper amount of the culture medium to the rotary screen cylinder (4) through a humidifying system, then entering the biological filter material, and carrying out membrane-hanging culture for 12 days; after the membrane is coated, the air inflow of the odor to be purified is sequentially increased to 100 percent of rated design air volume from 10 percent, 20 percent, 50 percent and 75 percent of rated design air volume within 4 days, and the daily waste gas treatment is carried out; meanwhile, the operating frequency of the water pump (M2) after film hanging for humidification is 20 seconds/120-480 minutes in summer and autumn, and the water quantity used for humidification is 15 liters/cubic biofilter material in winter and spring.

Technical Field

The invention relates to the field of odor treatment, in particular to waste gas treatment equipment for prolonging the service cycle of a biological filter material and a use method thereof.

Background

The malodorous gas not only has serious influence on the ecological environment, but also has great harm to the health of human bodies, and can cause central nerves to generate obstacles and pathological changes to cause chronic diseases and acute diseases.

The method for treating various malodorous gases aims at changing the material structure of the malodorous gases through the actions of physics, chemistry and biology and eliminating the malodorous gases. Common processing methods of the conventional malodorous gas include a combustion method, an oxidation method, an absorption method, an adsorption method, a neutralization method, a biological method and the like. Among them, biological deodorization is one of the current "hot spot" technologies, which has the advantages of simple equipment, convenient operation, low operation cost, less secondary pollution, etc., and is mostly used for purifying malodorous gases which are easy to dissolve in water and degrade. In the patent application 201910450962.X, the biological waste gas treatment device applicable to multiple working conditions, the biological filter material portion 3 comprises a filter material box 301 with a sealed structure, the filter material box 301 is provided with a biological filter material cavity 302, and biological filler (also called biological filter material) 304 is arranged in the biological filter material cavity 302. However, the filtering material box in the prior art has the following defects:

1) the biological filter material is inconvenient to load and unload in the filter material box. The whole device needs to be detached from the use environment, and the device is opened;

2) due to the sedimentation of the biological filter material, the dropped biological membrane is plugged, so that the biological filter material is hardened in the operation process, the permeability of the biological filter material is reduced, the wind resistance of a deodorization system is increased, the energy consumption is increased, the odor treatment efficiency is reduced, and manual material turning and material changing have to be carried out again.

Disclosure of Invention

The invention aims to provide waste gas treatment equipment for prolonging the service cycle of a biological filter material and a using method thereof, which can reduce the working intensity of workers and improve the efficiency of loading and unloading the biological filter by 5-10 times; effectively utilizes the purification effect of all biological filter materials, prevents the hardening of the filter materials, improves the permeability of the filter materials in use, prolongs the service life of the biological filter materials, further improves the deodorization effect and better protects the environment. Meanwhile, the wind resistance can be reduced, and the energy consumption in the deodorization process is reduced.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an extension biological filter material life cycle's exhaust-gas treatment equipment, is including the biological filter material system that is used for purifying the foul smell, biological filter material system sets up in a sealed cover internally, and this biological filter material system includes: the rotary screen cylinder is used for containing biological filter materials, the annular end faces at two ends of the rotary screen cylinder are fixedly arranged on the hollow rotating shaft through corresponding detachable structures, gas nozzles are uniformly distributed on a shaft body of the hollow rotating shaft in the rotary screen cylinder, one end of the hollow rotating shaft is blocked, the other end of the hollow rotating shaft is opened, the blocked end of the hollow rotating shaft is lower than the opened end, so that two ends of the rotary screen cylinder have height difference, the opened end is communicated with an odor source pipeline through a rotary joint, a spiral guide plate is axially arranged on the inner wall of the rotary screen cylinder, and a material inlet and outlet bin door is arranged on the wall of the higher end of the rotary screen cylinder; the detachable structure includes: the detachable ring is plugged outside the annular end face annular hole, a first sealing ring is arranged between the annular end face and the detachable ring, a gap is formed between the annular hole of the detachable ring and the hollow rotating shaft, a stop ring is arranged on the inner side of the detachable ring, a second sealing ring is arranged between the stop ring and the detachable ring, the annular hole of the stop ring is fixedly and hermetically connected with the hollow rotating shaft, two ends of the hollow rotating shaft are fixed on the bracket through corresponding bearings, and the motor is in transmission connection with a gear arranged at the open end of the hollow rotating shaft through a gearbox; the humidifying system is composed of a water tank, a water pump arranged in the water tank, a water pipe and a plurality of spiral spray heads on the water pipe, wherein the spiral spray heads are arranged in a line and are positioned above the rotary screen cylinder; the water tank is provided with a water inlet pipe and a water tank blow-off pipe, the water inlet pipe is provided with a water inlet valve, the water tank blow-off pipe is provided with a blow-off valve, the water tank is provided with a transmission pipe, the transmission pipe is connected with the water pipe, the transmission pipe is provided with a three-way valve, the middle outlet of the three-way valve is connected with a bypass pipe, and the outlet of the bypass pipe is connected with a hose; the water pump and the motor are electrically connected with the circuit controller through corresponding leads.

The method for using the waste gas treatment equipment for prolonging the service cycle of the biological filter material in claim 1, which is characterized by comprising the following steps:

when charging, firstly removing the top plate and the side plate of the cover body, opening the detachable ring at the higher end of the rotary screen cylinder, pouring the biological filter material from the annular hole at the annular end surface of the opened side, starting the motor, pushing the biological filter material to the other end of the rotary screen cylinder through the spiral guide plate in the rotary screen cylinder, stopping the machine when the biological filter material cannot be charged, and closing the detachable ring; starting a motor to rotate the material inlet and outlet bin door to the upper part, opening the material inlet and outlet bin door, filling biological filter materials from the material inlet and outlet bin door, filling the rotary screen cylinder, and closing the material inlet and outlet bin door;

when discharging, firstly, the top plate and the side plate of the cover body are removed, the detachable ring at the higher end of the rotary screen cylinder is opened, the feeding and discharging bin door is opened, the motor is started, and the biological filter material is discharged from the annular hole at the annular end surface and the feeding and discharging bin door through the spiral guide plate in the rotary screen cylinder;

when the hardening occurs in the operation process and the biological filter material needs to be loosened, the operation steps are as follows:

firstly, removing a top plate and a side plate of the cover body, opening a detachable ring at one end, starting a motor, and discharging a part of the biological filter material from a ring hole at the annular end surface through a spiral guide plate in a rotary screen cylinder to reserve a certain space; switching a three-way valve of the humidification system to a bypass pipe, connecting a hose to an outlet of the bypass pipe, enabling a water outlet of the hose to face an annular hole of the annular end face, opening a water pump of the humidification system, starting a motor, scattering and washing hardened biological filter materials by using high-pressure water sprayed out of the hose, and then directly washing the biological filter materials in the rotary screen cylinder; and the biological filter material discharged before is stored by a net sheet or a net bag, fine impurities and biological films in the biological filter material are removed by high-pressure leaching of the biological filter material, and finally the leached biological filter material is filled in a rotary net cylinder.

The cover body is a closed space, odor to be purified enters the hollow rotating shaft from an odor source pipeline, is discharged from the gas nozzle, is purified by a biological filter material layer formed by the biological filter material, is discharged from meshes of the rotary screen cylinder, and is finally discharged to a lower-level treatment device or a discharge cylinder from an exhaust port in the middle of the cover body through a pipeline; the sewage in the cover body is discharged from a sewage discharge pipe at the bottom.

The biological filter material is activated carbon, or ceramsite, or volcanic rock, or composite polyurethane spherical filler.

The rotary net cylinder is formed by enclosing a mesh plate, and a plurality of net cylinder supports are arranged in the rotary net cylinder.

The diameter of the small hole on the rotary screen cylinder is 8-15 mm; the gas nozzle on the shaft body of the hollow rotating shaft is in a convex frustum shape, the height of the frustum is 8-20 mm, and the diameter of a gas hole at the top end is 3-5 mm.

After the rotary screen cylinder is filled with the biological filter material, adding biological strains and a culture medium into a water tank, spraying the biological strains and the culture medium into the rotary screen cylinder through a humidifying system, and then entering the biological filter material; then, controlling the air input of the odor to be purified to be 5% of the rated design amount, spraying a proper amount of the culture medium to the rotary screen cylinder through a humidifying system, then entering the biological filter material, and carrying out biofilm culturing for 12 days; after the membrane is coated, the air inflow of the odor to be purified is sequentially increased to 100 percent of rated design air volume from 10 percent, 20 percent, 50 percent and 75 percent of rated design air volume within 4 days, and the daily waste gas treatment is carried out; meanwhile, the operating frequency of the water pump humidification after the membrane hanging is 20 seconds/120-plus 240 minutes in summer and autumn, and is 20 seconds/360-plus 480 minutes in winter and spring, and the water quantity used for each humidification is 15 liters per cubic biological filter material.

Compared with the prior art, the invention has the beneficial effects that:

1) the biological filter material is convenient to load and unload, the working intensity of workers is reduced, semi-automation is realized, and the loading and unloading efficiency is improved by 5-10 times; the odor is introduced from the central part of the biological filter material and is radiated to the periphery, so that the purification effect is further improved; in the deodorization process, the air path of the biological filter material is changed at any time through the rotation of the rotary screen cylinder, the purification effect of all the biological filter materials is effectively utilized, the hardening of the filter materials is effectively prevented, the permeability of the filter materials in use is improved, and the deodorization effect is further improved; meanwhile, the wind resistance and the energy consumption can be reduced; the both ends of rotatory net section of thick bamboo have the difference in height, so when rotatory net section of thick bamboo was rotatory, the biological filter material at top was by the height to low landing, the biological filter material of bottom is by low to high propelling movement under the effect of spiral baffle, make biological filter material in rotatory net section of thick bamboo except rotating around hollow rotating shaft and flow, it also produces around the axial upper and lower floor of hollow rotating shaft and flows, avoid biological filter material to harden, the biological filter material live time of extension, fully increase the contact of biological filter material and foul smell, the purification efficiency and the effect of improvement foul smell.

2) The further beneficial effects are that: the equipment can remove the hardening, carry out leaching and prolong the service life of the biological filter material by about 200 to 300 percent. The air volume is gradually increased from 5%, 10%, 20%, 50% and 75% of rated design air volume (namely 100% of rated design air volume), so that the strong impact of the odor wind power to be purified on biological fungus membranes is relieved, and the effect of reducing impact and realizing smooth transition is achieved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the housing of FIG. 1 with the top and side panels removed;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a cross-sectional view of the rotary screen cylinder of FIG. 2;

FIG. 5 is an enlarged end view of the rotary screen cylinder of FIG. 4;

FIG. 6 is a schematic view of an exhaust port formed in the middle of the left side plate of the housing of FIG. 1;

FIG. 7 is a top view of FIG. 6;

fig. 8 is a wiring schematic of the circuit controller of the present invention.

Detailed Description

In order to make the technical solution of the present invention clearer, the present invention will be described in detail below with reference to fig. 1 to 8. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

The invention relates to a waste gas treatment device for prolonging the service cycle of biological filter materials, which comprises a biological filter material system for purifying odor, wherein the biological filter material system is arranged in a sealed cover body 1, the cover body 1 can be cuboid, cylindrical or arched, and the biological filter material system comprises: the rotary screen cylinder 4 is used for containing biological filter materials, annular end faces 4-5 at two ends of the rotary screen cylinder 4 are fixedly arranged on a hollow rotating shaft 4-3 through corresponding detachable structures, a gas nozzle 4-3-1 is uniformly distributed on a shaft body of the hollow rotating shaft 4-3 in the rotary screen cylinder 4, one end of the hollow rotating shaft 4-3 is blocked, the other end of the hollow rotating shaft 4-3 is opened, the blocked end of the hollow rotating shaft 4-3 is lower than the opened end, so that two ends of the rotary screen cylinder 4 have height difference, the opened end is communicated with an odor source pipeline through a rotary joint, a spiral guide plate 4-2 is axially arranged on the inner wall of the rotary screen cylinder 4, and a material inlet and outlet bin door 4-1 is arranged on the cylinder wall at the higher end of the rotary screen cylinder 4; the detachable structure includes: the detachable ring 4-6 is plugged outside the ring hole of the annular end face 4-5, a first sealing ring is arranged between the annular end face 4-5 and the detachable ring 4-6, a gap is formed between the ring hole of the detachable ring 4-6 and the hollow rotating shaft 4-3, a stop ring 4-7 is arranged inside the detachable ring 4-6, a second sealing ring is arranged between the stop ring 4-7 and the detachable ring 4-6, the ring hole of the stop ring 4-7 and the hollow rotating shaft 4-3 are fixedly connected in a sealing manner (for example, welded or bonded), two ends of the hollow rotating shaft 4-3 are fixed on the support 3 through corresponding bearings, and the motor M1 is in transmission connection with a gear arranged at the open end of the hollow rotating shaft 4-3 through a gearbox 7; the humidifying system 2 is used for humidifying the biological filter material, the humidifying system 2 consists of a water tank 2-1, a water pump M2 arranged in the water tank 2-1, a water pipe 2-2 and a plurality of spiral spray heads 2-3 on the water pipe 2-2, and the spiral spray heads 2-3 are arranged in a straight line and are positioned above the rotary screen cylinder 4; the water tank 2-1 is provided with a water inlet pipe 2-4 and a water tank blow-off pipe 2-6, the water inlet pipe 2-4 is provided with a water inlet valve 2-5, the water tank blow-off pipe 2-6 is provided with a blow-off valve 2-7, the water tank 2-1 is provided with a transmission pipe 2-10, the transmission pipe 2-10 is connected with the water pipe 2-2, the transmission pipe 2-10 is provided with a three-way valve 2-8, the middle outlet of the three-way valve 2-8 is connected with a bypass pipe 2-9, and the outlet of the bypass pipe 2-9 is connected with a hose; the water pump M2 and the motor M1 are both electrically connected with the circuit controller KZQ through corresponding leads.

The use method of the waste gas treatment equipment for prolonging the use period of the biological filter material comprises the following steps:

when charging, firstly removing the top plate and the side plate of the cover body 1, opening the detachable ring 4-6 at the higher end of the rotary screen cylinder 4, pouring biological filter material from the ring hole of the ring-shaped end surface 4-5 at the opened side, starting the motor M1 (for example, rotating forwards), pushing the biological filter material to the other end of the rotary screen cylinder 4 through the spiral guide plate 4-2 in the rotary screen cylinder 4, stopping when the biological filter material cannot be charged, and closing the detachable ring 4-6; starting a motor M1 to rotate the charging and discharging bin door 4-1 to the upper part, opening the charging and discharging bin door 4-1, filling biological filter materials from the charging and discharging bin door 4-1, filling the rotary screen cylinder 4, and closing the charging and discharging bin door 4-1;

when discharging, firstly, the top plate and the side plate of the cover body 1 are removed, the detachable ring 4-6 at the higher end of the rotary screen cylinder 4 is opened, the charging and discharging bin door 4-1 is opened, the motor M1 is started (for example, reversed), and the biological filter material is discharged from the annular hole of the annular end surface 4-5 and the charging and discharging bin door 4-1 through the spiral guide plate 4-2 in the rotary screen cylinder 4;

when the hardening occurs in the operation process and the biological filter material needs to be loosened, the operation steps are as follows:

firstly, the top plate and the side plate of the cover body 1 are removed, the detachable ring 4-6 at one end is opened, the motor M1 is started (for example, the rotation is carried out reversely), and the biological filter material is discharged from the ring hole of the ring-shaped end surface 4-5 through the spiral guide plate 4-2 in the rotary screen cylinder 4 to reserve a certain space; switching a three-way valve 2-8 of the humidifying system 2 to a bypass pipe 2-9, connecting a hose to an outlet of the bypass pipe 2-9, enabling a water outlet of the hose to face an annular hole of an annular end face 4-5, opening a water pump M2 of the humidifying system 2, starting a motor M1, scattering and flushing hardened biological filter materials by using high-pressure water spray sprayed by the hose, and then directly leaching the biological filter materials in a rotary screen cylinder 4, wherein the pressure of the high-pressure water spray is preferably 0.20-0.26 Mpa; and the biological filter material discharged before is stored by a net sheet or a net bag, fine impurities and biological films in the biological filter material are removed by high-pressure leaching of the biological filter material, and finally the leached biological filter material is filled in the rotary net cylinder 4.

Preferably, the cover body 1 is a closed space, the odor to be purified enters the hollow rotating shaft 4-3 from an odor source pipeline, then is discharged from the gas nozzle 4-3-1, is purified by a biological filter material layer formed by the biological filter material, is discharged from meshes of the rotary screen cylinder 4, and finally is discharged to a lower-level processing device or a discharge cylinder from an exhaust port 1-2 in the middle of the cover body 1 through a pipeline; the sewage in the cover body 1 is discharged from a sewage discharge pipe 1-1 at the bottom and is discharged to a sewage conduit well. Preferably, the biological filter material is activated carbon, or ceramsite, or volcanic rock, or composite polyurethane spherical filler. Preferably, the rotary screen cylinder 4 is formed by enclosing a screen plate, and a plurality of screen cylinder supports 4-4 are arranged in the rotary screen cylinder 4. Preferably, the diameter of the small hole on the rotary screen cylinder 4 is 8-15 mm; the gas nozzle 4-3-1 on the shaft body of the hollow rotating shaft 4-3 is in a convex frustum shape, the height of the frustum is 8-20 mm, and the diameter of a gas hole at the top end is 3-5 mm.

As further preferred: after the rotary screen cylinder 4 is filled with biological filter materials, biological strains and culture media are added into the water tank 2-1, and the biological strains and the culture media are sprayed into the rotary screen cylinder 4 through a humidifying system and then enter the biological filter materials; then, controlling the air input of the odor to be purified to be 5% of the rated design amount, spraying a proper amount of the culture medium to the rotary screen cylinder 4 through a humidifying system, then entering the biological filter material, and carrying out biofilm culturing for 12 days; after the membrane is coated, the air inflow of the odor to be purified is sequentially increased to 100 percent of rated design air volume from 10 percent, 20 percent, 50 percent and 75 percent of rated design air volume within 4 days, and the daily waste gas treatment is carried out; meanwhile, the operating frequency of the water pump M2 humidification after membrane hanging is 20 seconds/120-one time 240 minutes in summer and autumn, and 20 seconds/360-one time 480 minutes in winter and spring, and the water quantity used for each humidification is 15 liters per cubic biological filter material.

The preparation steps of the biological strains and the culture medium are as follows (see the patent ZL201911246020.6 which is already issued by the applicant):

the method comprises the following steps: preparation of culture Medium

2 parts of yeast extract, 2 parts of sodium chloride, 6 parts of glucose, 975 parts of water, 0.3 part of edible vegetable oil and 7.0-7.5 of PH value;

placing the above materials into a fermentation tank, and sterilizing at 121 deg.C for 30 min;

step two: inoculation of

Adding bacteria to the culture medium at a concentration of 2x10⁹The bacillus AKL02 with the preservation number of CCTCC NO of M2019867 is one/ml;

step three: aerobic culture

Covering after inoculation, introducing filtered air at intervals, and stirring to perform aerobic culture in a lag phase and an exponential phase for 2 d;

step four: adding the biological strains and the culture medium into a water tank 2-1, and uniformly mixing by a water pump.

In the biofilm culturing, the preferable dosage of the biological strains and the culture medium is 15 liters per cubic filter material: in the 12-day biofilm culturing process, the adding frequency of the culture medium is as follows: the dosage of the biological filter material is 15 liters per cubic volume in summer and autumn for 240 minutes in 20 seconds/120 plus materials, and in winter and spring for 480 minutes in 20 seconds/360 plus materials.

The circuit controller KZQ comprises a first control unit KZ1 used for controlling the motor M1 to rotate forwards, reversely and stop, a second control unit KZ2 used for controlling the water pump M2 in the water tank 2-1 to start, operate and stop, and an air switch KQ used for protecting a circuit can be further arranged, wherein the air switch KQ is connected with a three-phase four-wire 380V mains supply, and a circuit principle block diagram of the circuit controller KZQ is shown in figure 6. The first control unit (circuit) KZ1 for controlling the motor M1 to rotate forward, stop and reverse and the second control unit (circuit) KZ2 for controlling the water pump M2 to start, operate and stop are commonly used three-phase motor control circuits, which are well known and will not be described herein.