Deodorization device and deodorization process for treating pollutants in pulping waste gas

Abstract

The invention belongs to the technical field of pulping waste gas treatment, and particularly relates to a deodorization device and a deodorization process for treating pollutants in pulping waste gas, the deodorization device comprises a spray tower main body, a spray mechanism is mounted on the spray tower main body, and a separation mechanism and a flow guide mechanism are mounted in the spray tower main body; the separation mechanism comprises a filter cartridge fixedly connected with the inner wall of the spray tower main body, the bottom of the filter cartridge is sealed, after pulping waste gas enters the spray tower main body, particles in the pulping waste gas are separated out through the filter cartridge, and then the spray mechanism sprays out atomized liquid medicine to be mixed with the pulping waste gas with the particles separated out. According to the pulping waste gas treatment device, large-particle-size particles in pulping waste gas can be filtered and separated through the filter cartridge, the large-particle-size particles are prevented from making contact with sprayed liquid medicine, the use amount of the sprayed liquid medicine can be reduced, and meanwhile the sprayed liquid medicine can make more sufficient contact with the pulping waste gas.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pulping waste gas treatment, and particularly relates to a deodorization device for treating pollutants in pulping waste gas and a deodorization process. BACKGROUND

[0002] The pollutants in pulping waste gas are complex, mainly including hydrogen sulfide, methyl mercaptan, ammonia and other malodorous gases, volatile organic compounds (VOCs) and dust, etc. In order to realize green production and reduce the harm of waste gas to the environment and human health, efficient and environmentally friendly waste gas treatment technology needs to be adopted, which promotes the development of various pulping waste gas deodorization processes. The waste gas usually contains high concentrations of particulate matter, including smoke dust, alkali dust, inorganic salt crystals, etc. If it is directly discharged without treatment, it will cause serious pollution to the atmospheric environment and harm human health.

[0003] At present, for the treatment of particulate matter in pulping waste gas, the wet spray tower (scrubber) is the most widely used primary treatment equipment. The basic principle is to use the spray system to atomize the scrubbing liquid (usually water or lye) and contact it with the upward waste gas. The particulate matter in the waste gas is captured by the liquid droplets under the mechanisms of inertial collision, interception, coagulation, etc. and then separated from the gas by a demister, so as to achieve the purpose of purifying the waste gas.

[0004] However, although some common spray towers have the function of filtering and separating particulate matter in waste gas, over a long period of use, the separated particulate matter mixed with the sprayed liquid will form slurry, which will block the filter screen or filter plate used for filtering the particulate matter in the waste gas after falling. Over a long period of time, it will greatly affect the subsequent work of the spray tower. Therefore, a deodorization device for treating pollutants in pulping waste gas and a deodorization process are proposed. SUMMARY

[0005] In order to solve the shortcomings in the prior art, a deodorization device for treating pollutants in pulping waste gas and a deodorization process are proposed.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme: a deodorization device for treating pollutants in pulping waste gas, comprising a spray tower main body, a spraying mechanism is installed on the spray tower main body, a separation mechanism and a flow guide mechanism are installed inside the spray tower main body, the separation mechanism comprises a filter cartridge fixedly connected with the inner wall of the spray tower main body, the bottom of the filter cartridge is provided with a sealing structure, after the pulping waste gas enters the spray tower main body, the particulate matter in the pulping waste gas is first separated out by the filter cartridge, then the spraying mechanism sprays atomized liquid to mix with the separated particulate matter in the pulping waste gas, the sprayed liquid is also used for backflushing the filter cartridge from inside to outside and uniformly coating the liquid in the filter holes of the filter cartridge, so that the liquid entering the filter cartridge from outside to inside subsequently first contacts the liquid in the filter holes of the filter cartridge.

[0007] Preferably, the flow guide mechanism comprises a circular plate fixedly connected with the inner wall of the spray tower body, the filter cylinder is fixedly installed at the bottom of the circular plate, a circular box is rotatably installed in the filter cylinder, two symmetrical rectangular boxes are fixedly installed on the side surface of the circular box, both of the rectangular boxes are in communication with the interior of the circular box, a plurality of spray holes are linearly arranged on the inner wall of the side of the rectangular box away from the circular box, a motor is fixedly installed at the bottom of the filter cylinder, and the output shaft of the motor is rotatably penetrated through the bottom of the filter cylinder and fixedly connected with the bottom end of the transmission pipe.

[0008] Preferably, a cylindrical tube is fixedly installed at the top of the circular plate, an annular plate is fixedly installed at the top of the cylindrical tube, a centrifugal fan blade is rotatably installed in the cylindrical tube, a plurality of L-shaped pipes are fixedly installed in a circumferential array on the side surface of the cylindrical tube in a penetrating manner, the bottom ends of the plurality of L-shaped pipes are penetrated through the circular plate and in communication with the interior of the filter cylinder, the centrifugal fan blade is rotatably installed in the cylindrical tube, a transmission pipe is fixedly installed at the bottom of the centrifugal fan blade, and the transmission pipe is rotatably penetrated through the circular plate and fixedly connected with the top end of the circular box.

[0009] Preferably, two groups of cross frames are fixedly installed on the side surface of the rectangular box, the same adsorbing guide roller is rotatably installed on the same cross frame, both of the adsorbing guide rollers are in abutment with the inner wall of the filter cylinder, two tapered pipes are fixedly installed on the side surface of the circular box in a penetrating manner, both of the tapered pipes are in communication with the interior of the circular box, and the sides of the two tapered pipes away from each other are in abutment with and slidably connected with the corresponding adsorbing guide rollers.

[0010] Preferably, a liquid hole is arranged on the centrifugal fan blade, the top end of the circular box is provided in an open manner, and the liquid hole is in communication with the interior of the circular box through the transmission pipe.

[0011] Preferably, the flow guide mechanism comprises a conical hopper one arranged above the annular plate and a conical hopper two arranged above the conical hopper one, a plurality of vertical rods are fixedly installed on the conical hopper one in a circumferential array in a penetrating manner, the top ends of the plurality of vertical rods are fixedly connected with the inner wall of the conical hopper two, the bottom ends of the plurality of vertical rods are fixedly connected with the top of the annular plate, the bottom of the conical hopper one is in abutment with the top of the centrifugal fan blade, and a through hole in communication with the liquid hole is arranged on the bottom of the conical hopper one.

[0012] Preferably, a conical tube two is arranged above the conical hopper two, a conical tube one is fixedly installed at the top of the conical tube two, the side edges of the conical tube two and the conical tube one are fixedly connected with the inner wall of the spray tower body, a conical guide ring is fixedly installed on the bottom inner wall of the conical tube two, and the conical guide ring is arranged in the same direction as the conical tube one.

[0013] Preferably, the spraying mechanism comprises a circulating water pump fixed outside the spraying tower body and a hollow frame fixed on the inner wall of the spraying tower body, the bottom of the hollow frame is fixedly provided with an atomizing nozzle, the atomizing nozzle is located above the flow guide mechanism, the hollow frame and the liquid outlet of the circulating water pump are connected through a water pipe, the water pipe penetrates through the spraying tower body and is fixedly connected with the spraying tower body, the spraying tower body is provided with an air inlet pipe, an air outlet pipe and a liquid outlet pipe, the air inlet pipe is located below the separation mechanism, the liquid outlet pipe is located below the air inlet pipe, and the air outlet pipe is located above the hollow frame.

[0014] Preferably, the device further comprises a cooler, a trickling filter tower, an activated carbon adsorption box, a fan and a chimney, wherein the cooler is used for cooling the pulping waste gas entering the spraying tower body, the trickling filter tower and the activated carbon adsorption box are used for treating the odor in the pulping waste gas discharged from the spraying tower body, the fan is used for providing power for the circulation of the pulping waste gas in the cooler, the spraying tower body, the trickling filter tower, the activated carbon adsorption box and the fan, and finally the pulping waste gas is discharged through the chimney.

[0015] A deodorization process for treating pollutants in pulping waste gas, which is suitable for the deodorization device for treating pollutants in pulping waste gas, comprises the following steps: S1, after the pulping waste gas is cooled by the cooler, the pulping waste gas enters the spraying tower body; S2, the particulate matters in the pulping waste gas are separated by the filter cartridge, and the medicine water is sprayed by the spraying mechanism to act on the pulping waste gas, so that the medicine water and the pulping waste gas react to remove harmful substances in the pulping waste gas; S3, the odor in the pulping waste gas discharged from the spraying tower body is decomposed and adsorbed by the trickling filter tower and the activated carbon adsorption box, and finally the pulping waste gas is converted into harmless and odorless gas and discharged through the chimney.

[0016] Compared with the prior art, the beneficial effects of the present application are: 1. The present application can filter and separate large-diameter particulate matters in the pulping waste gas by the filter cartridge, avoid the contact of the large-diameter particulate matters with the sprayed medicine liquid, reduce the use amount of the sprayed medicine liquid, and make the sprayed medicine liquid and the pulping waste gas more fully contact; 2. The sprayed medicine liquid is collected, transferred to the filter cartridge and sprayed from inside to outside, which not only can dredge the filter cartridge and reduce the blocking of the filter cartridge, but also can coat the medicine liquid in the filter holes of the filter cartridge through the two adsorption guide rollers, so that the subsequent waste gas first contacts the medicine liquid in the filter holes when passing through the filter holes of the filter cartridge and entering the inside of the filter cartridge. 3、When the liquid medicine is coated on the filter hole of the filter cylinder, it will form a very thin liquid film or small droplets, greatly increasing the contact area between the pulping waste gas and the liquid medicine. At the same time, when the pulping waste gas passes through these filter holes, the path is greatly lengthened, and the contact time with the liquid medicine is also increased, which ensures that the pollutants have enough time to be captured or reacted by the liquid medicine. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The overall structure schematic diagram of a deodorization device for treating pollutants in pulping waste gas is proposed in the present application. Figure 2 The side sectional view of a deodorization device for treating pollutants in pulping waste gas is proposed in the present application. Figure 3 The partial side sectional view of the spray tower body, separation mechanism and flow guide mechanism in a deodorization device for treating pollutants in pulping waste gas is proposed in the present application. Figure 4 The partial side sectional view of the separation mechanism and flow guide mechanism in a deodorization device for treating pollutants in pulping waste gas is proposed in the present application. Figure 5 The side sectional view of the separation mechanism and transmission pipe in a deodorization device for treating pollutants in pulping waste gas is proposed in the present application. Figure 6 The flow path diagram of pulping waste gas in a deodorization device for treating pollutants in pulping waste gas among the spray tower body, separation mechanism and flow guide mechanism is proposed in the present application. Figure 7 The flow path diagram of liquid medicine in a deodorization device for treating pollutants in pulping waste gas among the spray tower body, separation mechanism and flow guide mechanism is proposed in the present application. Figure 8 The flow chart of a deodorization process for treating pollutants in pulping waste gas is proposed in the present application.

[0018] In the figure: 1, spray tower body; 2, spraying mechanism; 3, separation mechanism; 4, flow guide mechanism; 5, cooler; 6, trickling filter tower; 7, activated carbon adsorption box; 8, fan; 9, chimney; 11, air inlet pipe; 12, air outlet pipe; 13, liquid discharge pipe; 21, circulating water pump; 22, water pipe; 23, hollow frame; 24, atomizing nozzle; 31, filter cylinder; 32, circular box; 33, rectangular box; 331, spray hole; 34, cross frame; 35, adsorption guide roller; 36, conical pipe; 37, motor; 41, circular plate; 42, transmission pipe; 43, centrifugal fan blade; 431, liquid hole; 44, cylinder; 45, annular plate; 46, L-shaped pipe; 47, conical hopper I; 471, perforation; 48, conical hopper II; 49, vertical rod; 410, conical cylinder I; 411, conical cylinder II; 412, conical guide ring. DETAILED DESCRIPTION

[0019] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] Please refer to Figure 1 - Figure 8 The present application provides a technical solution: a deodorization device for treating pollutants in pulp waste gas, comprising a spray tower body 1, a spraying mechanism 2 is installed on the spray tower body 1, a separation mechanism 3 and a flow guide mechanism 4 are installed inside the spray tower body 1, the separation mechanism 3 comprises a filter cylinder 31 fixedly connected with the inner wall of the spray tower body 1, the bottom of the filter cylinder 31 is sealed, after the pulp waste gas enters the spray tower body 1, the particulate matter in the pulp waste gas is first separated out by the filter cylinder 31, then the spraying mechanism 2 sprays the atomized liquid medicine to mix with the pulp waste gas from which the particulate matter is separated out, the sprayed liquid medicine is also used to backflush the filter cylinder 31 from inside to outside and evenly coat the filter holes of the filter cylinder 31, so that the liquid medicine subsequently entering the filter cylinder 31 from outside to inside first contacts the liquid medicine in the filter holes of the filter cylinder 31.

[0021] The flow guide mechanism 4 comprises a circular plate 41 fixedly connected with the inner wall of the spray tower body 1, the filter cylinder 31 is fixedly installed at the bottom of the circular plate 41, a circular box 32 is rotatably installed in the filter cylinder 31, two symmetrical rectangular boxes 33 are fixedly installed on the side surface of the circular box 32, both of the rectangular boxes 33 are in communication with the inside of the circular box 32, a plurality of spray holes 331 are linearly arranged on the inner wall of the side of the rectangular box 33 away from the circular box 32, a motor 37 is fixedly installed at the bottom of the filter cylinder 31, and the output shaft of the motor 37 penetrates through the bottom of the filter cylinder 31 and is fixedly connected with the bottom end of a transmission pipe 42.

[0022] The top of the circular plate 41 is fixedly provided with a cylinder 44, the top of the cylinder 44 is fixedly provided with an annular plate 45, the cylinder 44 is rotatably provided with a centrifugal fan blade 43, the side of the cylinder 44 is fixedly provided with a plurality of L-shaped pipes 46 arranged in a circumferential array in a penetrating manner, the bottom end of each of the plurality of L-shaped pipes 46 penetrates the circular plate 41 and is connected with the inside of the filter cylinder 31, the inside of the cylinder 44 is rotatably provided with the centrifugal fan blade 43, the bottom of the centrifugal fan blade 43 is fixedly provided with a transmission pipe 42, and the transmission pipe 42 penetrates the circular plate 41 and is fixedly connected with the top end of the circular box 32.

[0023] The side of the rectangular box 33 is fixedly provided with two groups of cross frames 34, the same cross frame 34 is rotatably provided with the same adsorbing guide roller 35, the two adsorbing guide rollers 35 are in abutment with the inner wall of the filter cylinder 31, the side of the circular box 32 is fixedly provided with two tapered pipes 36 in a penetrating manner, the two tapered pipes 36 are connected with the inside of the circular box 32, and the sides away from each other of the two tapered pipes 36 are in abutment with and slidably connected with the corresponding adsorbing guide rollers 35.

[0024] Further, the adsorbing guide roller 35 is used for adsorbing the spraying liquid and extruding the liquid into the filter holes of the filter cylinder 31 in an extruding manner.

[0025] The centrifugal fan blade 43 is provided with a liquid hole 431, the top end of the circular box 32 is provided in an open manner, and the liquid hole 431 is connected with the inside of the circular box 32 through the transmission pipe 42.

[0026] The flow guide mechanism 4 comprises a conical hopper one 47 arranged above the annular plate 45 and a conical hopper two 48 arranged above the conical hopper one 47, a plurality of vertical rods 49 arranged in a circumferential array are fixedly provided on the conical hopper one 47 in a penetrating manner, the top end of each of the plurality of vertical rods 49 is fixedly connected with the inner wall of the conical hopper two 48, the bottom end of each of the plurality of vertical rods 49 is fixedly connected with the top of the annular plate 45, the bottom of the conical hopper one 47 is in abutment with the top of the centrifugal fan blade 43, and the bottom of the conical hopper one 47 is provided with a through hole 471 connected with the liquid hole 431.

[0027] The top of the conical hopper two 48 is provided with a conical cylinder two 411, the top of the conical cylinder two 411 is fixedly provided with a conical cylinder one 410, the side of the conical cylinder two 411 and the side of the conical cylinder one 410 are fixedly connected with the inner wall of the spraying tower body 1, the bottom inner wall of the conical cylinder two 411 is fixedly provided with a conical guide ring 412, and the setting direction of the conical guide ring 412 is the same as that of the conical cylinder one 410.

[0028] The spraying mechanism 2 comprises a circulating water pump 21 fixed outside the spraying tower body 1 and a hollow frame 23 fixed on the inner wall of the spraying tower body 1, the bottom of the hollow frame 23 is fixedly installed with an atomizing nozzle 24, the atomizing nozzle 24 is located above the flow guiding mechanism 4, the hollow frame 23 and the liquid outlet of the circulating water pump 21 are connected through a water pipe 22, the water pipe 22 penetrates through the spraying tower body 1 and is fixedly connected with the spraying tower body 1, the spraying tower body 1 is provided with an air inlet pipe 11, an air outlet pipe 12 and a liquid discharge pipe 13, the air inlet pipe 11 is located below the separation mechanism 3, the liquid discharge pipe 13 is located below the air inlet pipe 11, and the air outlet pipe 12 is located above the hollow frame 23.

[0029] Further, the cooler 5, the trickling filter tower 6, the activated carbon adsorption box 7, the fan 8 and the chimney 9 are also included, wherein the cooler 5 is used for cooling the pulping waste gas entering the spraying tower body 1, the trickling filter tower 6 and the activated carbon adsorption box 7 are used for treating the odor in the pulping waste gas discharged from the spraying tower body 1, the fan 8 is used for providing power for the flow of the pulping waste gas in the cooler 5, the spraying tower body 1, the trickling filter tower 6, the activated carbon adsorption box 7 and the fan 8, and finally the pulping waste gas is discharged through the chimney 9, the cooler 5, the trickling filter tower 6, the activated carbon adsorption box 7, the fan 8, the chimney 9 and the air inlet pipe 11 and the air outlet pipe 12 are connected in series through the ventilation pipe.

[0030] Further, as shown in Figure 3 - Figure 5 The starting motor 37 drives the circular box 32 to rotate clockwise, and the circular box 32 drives the centrifugal fan blade 43 to rotate clockwise through the transmission pipe 42, and with the clockwise rotation of the centrifugal fan blade 43, the pulping waste gas outside the filter cylinder 31 enters the inside of the filter cylinder 31 from outside and enters the cylinder 44 through a plurality of L-shaped pipes 46, and the pulping waste gas entering the cylinder 44 is discharged upward to the outside of the annular plate 45.

[0031] Further, the liquid medicine falling on the conical cylinder one 410 will fall on the top of the conical hopper two 48 under the action of gravity, and part of the liquid medicine will slide down along the inner wall of the conical cylinder two 411, and the liquid medicine can be prevented from continuing to slide down along the inner wall of the conical cylinder two 411 by the blocking of the conical guide ring 412, so as to ensure that all the liquid medicine can fall on the top of the conical hopper two 48.

[0032] In this embodiment, the pulping waste gas enters the spraying tower body 1 through the air inlet pipe 11, and after the pulping waste gas is filtered by the filter cylinder 31 and enters the filter cylinder 31, the pulping waste gas enters the cylinder 44 through a plurality of L-shaped pipes 46, and then the pulping waste gas in the cylinder 44 is discharged through the top opening and discharged along the outer wall of the conical hopper one 47, and then the pulping waste gas is discharged along the gap between the conical cylinder two 411 and the conical hopper two 48, and then the liquid medicine sprayed by the atomizing nozzle 24 is mixed with the air discharged, and the path diagram of the pulping waste gas flowing through the separation mechanism 3 and the flow guiding mechanism 4 is shown in Figure 6 . The liquid medicine sprayed from the atomizing nozzle 24 mixes with the upwardly discharged pulping waste gas, and then falls on the inner wall of the conical cylinder 1 410 and the outer wall of the conical hopper 2 48. The liquid medicine falling on the inner wall of the conical cylinder 1 410 falls on the outer wall of the conical hopper 2 48 under the action of gravity. Finally, all the liquid medicine falls on the inner wall of the conical hopper 1 47 along the outer wall of the conical hopper 2 48. Then, the liquid medicine falls and enters the circular box 32 through the perforations 471, the liquid holes 431 and the transmission pipe 42. During this process, the path of the liquid medicine flowing through the flow guide mechanism 4 is as shown in the figure. Figure 7 After the liquid medicine enters the circular box 32, the liquid medicine in the circular box 32 enters the two rectangular boxes 33 under the action of centrifugal force as the circular box 32 rotates. Then, the liquid medicine is sprayed from the multiple spray holes 331 on the side of the rectangular box 33. The liquid medicine sprayed from the multiple spray holes 331 will flush the filter holes on the filter cylinder 31 from the inside out, so that the filter cylinder 31 can always maintain an unobstructed state during a long period of filtering of particulate matter in the pulping waste gas. After the liquid medicine enters the circular box 32, the liquid medicine in the circular box 32 enters the two conical pipes 36 under the action of centrifugal force as the circular box 32 rotates. Then, the liquid medicine in the conical pipes 36 falls into the adsorbing guide roller 35. Since the adsorbing guide roller 35 abuts against the inner wall of the filter cylinder 31, the adsorbing guide roller 35 rotates as the adsorbing guide roller 35 rotates around the axis of the filter cylinder 31. During the rotation of the adsorbing guide roller 35, the adsorbing guide roller 35 carries the liquid medicine in the conical pipes 36 and applies the liquid medicine to the inner wall of the filter cylinder 31. Then, the liquid medicine enters the filter holes of the filter cylinder 31 which are dredged by the rectangular box 33. Then, the pulping waste gas entering the inside of the filter cylinder 31 from the outside will squeeze out the liquid medicine in the filter holes of the filter cylinder 31. During this process, the pulping waste gas will first contact and mix with the liquid medicine in the filter holes of the filter cylinder 31.

[0033] A deodorization process for treating pollutants in pulping waste gas, which is suitable for the above-mentioned deodorization device for treating pollutants in pulping waste gas, comprises the following steps: S1, the pulping waste gas enters the spray tower body 1 after being cooled by the cooler 5; S2, the particulate matter in the pulping waste gas is separated by the filter cylinder 31, and the liquid medicine is sprayed by the spraying mechanism 2 to act on the pulping waste gas, so that the liquid medicine and the pulping waste gas react chemically to remove harmful substances in the pulping waste gas; S3, the pulping waste gas discharged from the spray tower body 1 is subjected to odor decomposition and adsorption by the trickling filter tower 6 and the activated carbon adsorption box 7, and finally the pulping waste gas is converted into harmless odorless gas and discharged through the chimney 9.

[0034] ​The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A deodorization device for treating pollutants in pulp mill off-gas, comprising a spray tower body (1), characterized in that: The spray tower body (1) is provided with a spraying mechanism (2), and the inside of the spray tower body (1) is provided with a separation mechanism (3) and a flow guide mechanism (4), the separation mechanism (3) comprises a filter cylinder (31) fixedly connected with the inner wall of the spray tower body (1), and the bottom of the filter cylinder (31) is provided with a sealing structure; after the pulping waste gas enters the inside of the spray tower body (1), the particulate matters in the pulping waste gas are separated out through the filter cylinder (31) first, then the spraying mechanism (2) sprays the atomized liquid medicine to mix with the pulping waste gas from which the particulate matters are separated out, and the sprayed liquid medicine is also used for back-flushing the filter cylinder (31) from inside to outside and uniformly coating the liquid medicine in the filter holes of the filter cylinder (31), so that the liquid medicine subsequently entering the filter cylinder (31) from outside to inside first contacts the liquid medicine in the filter holes of the filter cylinder (31).

2. A deodorizing device for treating pollutants in pulp mill off-gas according to claim 1, characterized in that The flow guide mechanism (4) comprises a circular plate (41) fixedly connected with the inner wall of the spray tower body (1), the filter cylinder (31) is fixedly installed at the bottom of the circular plate (41), the filter cylinder (31) is rotatably installed with a circular box (32), the circular box (32) is fixedly installed with two symmetrical rectangular boxes (33) on the side surface, the two rectangular boxes (33) are both communicated with the inside of the circular box (32), a plurality of spray holes (331) in linear distribution are formed in the inner wall of the side of the rectangular box (33) away from the circular box (32), the bottom of the filter cylinder (31) is fixedly installed with a motor (37), and the output shaft of the motor (37) is rotatably penetrated through the bottom of the filter cylinder (31) and fixedly connected with the bottom end of a transmission pipe (42).

3. A deodorizing device for treating pollutants in pulp mill off-gas according to claim 2, characterized in that The top of the circular plate (41) is fixedly installed with a circular cylinder (44), the top of the circular cylinder (44) is fixedly installed with an annular plate (45), the circular cylinder (44) is rotatably installed with a centrifugal fan blade (43), the circular cylinder (44) is fixedly installed with a plurality of L-shaped pipes (46) in a circumferential array distribution in a penetrating mode on the side surface, the bottom ends of the plurality of L-shaped pipes (46) are all penetrated through the circular plate (41) and communicated with the inside of the filter cylinder (31), the circular cylinder (44) is rotatably installed with the centrifugal fan blade (43) in the inside, the centrifugal fan blade (43) is fixedly installed with the transmission pipe (42) at the bottom, and the transmission pipe (42) is rotatably penetrated through the circular plate (41) and fixedly connected with the top end of the circular box (32).

4. A deodorizing device for treating pollutants in pulp mill off-gas according to claim 3, characterized in that The side surface of the rectangular box (33) is fixedly installed with two groups of cross frames (34), the same cross frame (34) is rotatably installed with the same adsorbing guide roller (35), the two adsorbing guide rollers (35) are all abutted against the inner wall of the filter cylinder (31), the side surface of the circular box (32) is fixedly installed with two tapered pipes (36) in a penetrating mode, the two tapered pipes (36) are both communicated with the inside of the circular box (32), and the sides of the two tapered pipes (36) away from each other are respectively abutted against and slidably connected with the corresponding adsorbing guide rollers (35).

5. A deodorizing device for treating pollutants in pulp mill off-gas according to claim 3, characterized in that: The centrifugal fan blade (43) is provided with a liquid hole (431), the top end of the circular box (32) is provided with an opening structure, and the liquid hole (431) is communicated with the inside of the circular box (32) through the transmission pipe (42).

6. A deodorizing device for treating pollutants in pulp mill off-gas according to claim 5, characterized in that: The flow guide mechanism (4) comprises a conical hopper I (47) arranged above a ring-shaped plate (45) and a conical hopper II (48) arranged above the conical hopper I (47), a plurality of vertical rods (49) in a circumferential array are fixedly installed on the conical hopper I (47) in a through manner, the top ends of the vertical rods (49) are fixedly connected with the inner wall of the conical hopper II (48), the bottom ends of the vertical rods (49) are fixedly connected with the top of the ring-shaped plate (45), the bottom of the conical hopper I (47) is attached to the top of the centrifugal fan blade (43), and a perforation (471) in communication with the liquid hole (431) is formed in the bottom of the conical hopper I (47).

7. A deodorizing device for treating pollutants in pulp mill off-gas according to claim 6, characterized in that A conical cylinder II (411) is arranged above the conical hopper II (48), a conical cylinder I (410) is fixedly installed on the top of the conical cylinder II (411), the side edges of the conical cylinder II (411) and the conical cylinder I (410) are fixedly connected with the inner wall of the spray tower body (1), a conical guide ring (412) is fixedly installed on the bottom inner wall of the conical cylinder II (411), and the arrangement direction of the conical guide ring (412) is the same as that of the conical cylinder I (410).

8. A deodorizing device for treating pollutants in pulp mill off-gas according to claim 1, characterized in that: The spray mechanism (2) comprises a circulating water pump (21) fixed outside the spray tower body (1) and a hollow frame (23) fixed on the inner wall of the spray tower body (1), the bottom of the hollow frame (23) is fixedly installed with an atomizing nozzle (24), the atomizing nozzle (24) is arranged above the flow guide mechanism (4), the hollow frame (23) and the liquid outlet of the circulating water pump (21) are connected in communication through a water pipe (22), the water pipe (22) penetrates through and is fixedly connected with the spray tower body (1), the spray tower body (1) is provided with an air inlet pipe (11), an air outlet pipe (12) and a liquid discharge pipe (13), the air inlet pipe (11) is arranged below the separation mechanism (3), the liquid discharge pipe (13) is arranged below the air inlet pipe (11), and the air outlet pipe (12) is arranged above the hollow frame (23).

9. A deodorizing device for treating pollutants in pulp mill off-gas according to claim 1, characterized in that: Further comprising a cooler (5), a trickling filter tower (6), an activated carbon adsorption box (7), a fan (8) and a chimney (9), wherein the cooler (5) is used for cooling the pulping waste gas entering the spray tower body (1), the trickling filter tower (6) and the activated carbon adsorption box (7) are used for treating the odor in the pulping waste gas discharged from the spray tower body (1), the fan (8) is used for providing power for the flow of the pulping waste gas in the cooler (5), the spray tower body (1), the trickling filter tower (6), the activated carbon adsorption box (7) and the fan (8), and finally the pulping waste gas is discharged through the chimney (9).

10. A deodorization process for treating pollutants in pulp mill off-gas, suitable for use in a deodorization apparatus for treating pollutants in pulp mill off-gas according to claim 9, characterized by: The method comprises the following steps: S1, after the pulping waste gas is cooled by the cooler (5), the pulping waste gas enters the spray tower body (1); S2, the particulate matters in the pulping waste gas are separated by the filter cylinder (31), and the medicine water is sprayed by the spray mechanism (2) to act on the pulping waste gas, so that the harmful substances in the pulping waste gas are removed through the chemical reaction between the medicine water and the pulping waste gas; S3, the spray tower body (1) discharged by the trickling filter tower (6) and activated carbon adsorption tank (7) for the decomposition of odor and adsorption, the final pulp waste gas into harmless odorless gas and through the chimney (9) exhaust.

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