CN108525496B

CN108525496B - Sulfide purification treatment method for industrial waste gas

Info

Publication number: CN108525496B
Application number: CN201810384262.0A
Authority: CN
Inventors: 费先艳
Original assignee: Jiangsu Landian Environmental Protection Co ltd
Current assignee: JIANGSU LANDIAN ENVIRONMENTAL PROTECTION Co.,Ltd.
Priority date: 2018-04-26
Filing date: 2018-04-26
Publication date: 2020-12-15
Anticipated expiration: 2038-04-26
Also published as: CN108525496A

Abstract

The invention discloses a sulfide purification treatment method of industrial waste gas, which comprises the following steps of S1: firstly, conveying a liquid aqueous solution mixed with a desulfurization solution to a filtering device through a water conveying device; s2: starting the dust guiding device, starting the fan, driving the impeller to rotate around the axis of the fan by the output end of the fan, enabling one part of the air after speed reduction to enter the upper filtering chamber through the guide channel, and the other part of the air to enter the lower filtering chamber through the filtering holes and increasing the air pressure of the lower filtering chamber, and enabling all the air entering the guide channel from the upper chamber to flow into the upper filtering chamber when the lower filtering chamber is under high pressure; s3: air entering the upper filtering chamber collides with the rain curtain, large water drops in the rain curtain adsorb dust in the air and collide against the blocking conical surface and the filtering holes, the large water drops colliding against the blocking conical surface flow along the inclined surface of the blocking conical surface and fall to the filtering holes from the edge of the blocking conical surface under the action of self gravity, air carries residual dust to collide into the atomized cloud cluster, and the dust adsorbs small water drops in the cloud cluster.

Description

Sulfide purification treatment method for industrial waste gas

Technical Field

The invention relates to the field of dust removal, in particular to a sulfide purification treatment method for industrial waste gas.

Background

In the course of the work in many industrial production workshops, can produce a large amount of dusts and waste gas, these dusts and waste gas suspend in the air usually, the dust concentration in place is very high a bit, the production operational environment has seriously been influenced, also bring very big harm to production line staff's health, multiple diseases can be induced even, and direct the external world of discharging can pollute the atmosphere, current solution adopts the filter bag dust remover to carry out purification treatment usually, its dust absorption speed is slower, and to high temperature, high humidity, poisonous dirty gas's filter effect is poor, the wet settlement of still adoption filters, but it is not good to relate to the effect, and the utilization ratio to the water resource is not high, the water resource has been wasted.

Disclosure of Invention

In order to solve the defects of the prior art, the invention aims to provide a sulfide purification treatment method for industrial waste gas.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

the sulfide purification treatment method of industrial waste gas comprises the following steps:

s1: firstly, conveying a liquid aqueous solution mixed with a desulfurization solution to a filtering device through a water conveying device; the water pump is started, the water pump absorbs the liquid water solution mixed with the desulfurization solution in the lower reflux cavity through the water pumping pipe and conveys the liquid water solution to the water conveying pipe through the water outlet pipe, the liquid water is conveyed to the atomizing nozzle through the water conveying pipe and the rotating pipe, the atomizing nozzle changes part of the liquid water into large water drops to be sprayed out to form a rain curtain, the other part of the liquid water is atomized to be sprayed out and forms a cloud cluster by atomized small water drops in the inner cavity of the filter cylinder, and the rest of the liquid water passes through the connecting pipe, the supporting pipe and the annular flow guide pipe and is sprayed out by the atomizing nozzle to form a second rain curtain and a second atomized cloud cluster;

s2: at the moment, the dust guiding device is started, the fan is started, the output end of the fan drives the impeller to rotate around the axis of the impeller, the impeller blows air in the inner cavity of the sealing shell into the inner cavity of the speed reducing shell through the dust guiding pipe, the air pressure in the inner cavity of the sealing shell is reduced, air with dust outside enters the inner cavity of the sealing shell from the ventilation opening under the action of atmospheric pressure, the air with dust entering the inner cavity of the sealing shell passes through the dust guiding pipe and penetrates through the connecting hole in the supporting plate to enter the lower cavity of the speed reducing shell under the action of the impeller, the air flows to the upper cavity from the lower cavity, the air passes through the fan and drives the fan to rotate around the axis of the fan, the fan drives the rotary pipe and the connecting pipe to rotate around the axis of the fan, the rotary pipe drives the atomizing nozzle to rotate, the atomizing nozzle uniformly sprays large water, the water curtain and the atomized cloud cluster sprayed by the atomizing spray head on the annular flow guide pipe along with rotation are distributed more uniformly, partial kinetic energy of air is converted into kinetic energy of the fan, the decelerated air flows to the block conical surface from the upper chamber and collides with the block conical surface under the guidance of the guide arc surface, the flow rate of the air is further reduced, one part of the decelerated air enters the upper filtering chamber through the guide channel, the other part of the decelerated air enters the lower filtering chamber through the filtering hole, the air pressure of the lower filtering chamber is increased, and when the lower filtering chamber is under high pressure, all the air entering the guide channel from the upper chamber flows into the upper filtering chamber;

s3: the air entering the upper filtering chamber collides with the rain curtain, large water drops in the rain curtain adsorb dust in the air and collide against the blocking conical surface and the filtering holes, the large water drops colliding against the blocking conical surface flow along the inclined surface of the blocking conical surface and fall to the filtering holes from the edge of the blocking conical surface under the action of self gravity, the air carrying residual dust collides into the atomized cloud cluster, and the dust adsorbs small water drops in the cloud cluster, the atomizing nozzles continuously spray atomized water droplets, so that the water droplets carrying dust are increased and collide with each other to be condensed into large water droplets, the large water droplets fall on the inclined plane of the barrier conical surface or in the filtering hole under the action of self gravity, the large water droplets carrying dust are gathered near the filtering hole and fall into the lower filtering chamber through the filtering hole and finally fall into the upper backflow cavity, and the air with dust in the lower filtering chamber can be filtered in the process that the large water droplets fall into the upper backflow cavity from the lower filtering chamber;

s4: the sewage with dust gathers in the upper backflow cavity, the air pressure of the left cavity is reduced in the process that the water pump extracts pure liquid water in the lower backflow cavity, the sewage with dust in the upper backflow cavity enters the left cavity through the high-density filter screen under the action of the atmospheric pressure, and the sewage with dust is changed into relatively clean liquid water under the filtering action of the high-density filter screen and is conveyed to the filtering device by the water pump to complete water circulation.

The technical scheme is further improved and optimized.

The high-density filter screen comprises a filter frame matched with the inner cavity of the water tank, a high-density activated carbon filter element is arranged in the filter frame, and the outer layer of the activated carbon filter element is wrapped by two layers of polypropylene superfine fiber felts.

Compared with the prior art, the invention has the beneficial effects that: the invention carries out industrial dust removal through wet sedimentation, has high dust removal efficiency and good treatment effect on high-temperature, high-humidity and toxic dust-containing gas, and can save water resources through a water circulation structure, thereby improving the utilization rate of the water resources.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic view showing the structure of the connection between the filter unit and the dust collecting unit according to the present invention.

Fig. 3 is a schematic structural view of the connection between the filtering device and the water delivery device of the present invention.

FIG. 4 is a schematic view of the connection structure of the deceleration shell and the dust guiding tube according to the present invention.

FIG. 5 is a schematic structural diagram of a dust guiding device of the present invention.

FIG. 6 is a schematic structural diagram of a dust guiding device of the present invention.

Fig. 7 is a schematic structural view of the water delivery device of the present invention.

Fig. 8 is a schematic structural view of the water delivery device of the present invention.

Fig. 9 is a schematic structural diagram of the filtering device of the present invention.

FIG. 10 is a schematic view of the connection structure of the secondary filtering mechanism and the collecting mechanism of the present invention.

FIG. 11 is a schematic view of the connection structure of the secondary filtering mechanism and the collecting mechanism of the present invention.

FIG. 12 is a schematic structural diagram of the deceleration mechanism of the present invention.

FIG. 13 is a schematic structural diagram of a deceleration mechanism and a spraying mechanism according to the present invention.

FIG. 14 is a cross-sectional view of the deceleration mechanism and spray mechanism of the present invention.

FIG. 15 is a schematic structural diagram of the deceleration mechanism of the present invention.

FIG. 16 is a schematic view of the structure of the secondary filtering mechanism and the collecting mechanism of the present invention.

Fig. 17 is a schematic structural diagram of a secondary filtering mechanism of the present invention.

FIG. 18 is a schematic view of the structure of the secondary filtering mechanism of the present invention.

Fig. 19 is a schematic view of the structure of the spraying mechanism of the present invention.

Fig. 20 is a schematic view of the structure of the spraying mechanism of the present invention.

Fig. 21 is a schematic structural view of a spraying mechanism of the present invention.

FIG. 22 is a schematic view of the structure of the support member of the present invention.

Labeled as:

10. a dust-attracting device; 110. a bracket; 120. a fan; 130. a vent; 140. an impeller; 150. packaging the shell; 160. a dust guide pipe; 170. mounting a shell;

20. a water delivery device; 210. a water tank; 220. a water pump; 230. a water outlet pipe; 240. a receiving tube; 250. a water pumping pipe; 260. a left chamber; 270. a high density screen; 280. a right chamber; 290. a frame;

30. a filtration device; 310. a speed reduction mechanism; 311. a deceleration shell; 312. a fan; 313. a disc; 314. a guide conical surface; 315. a blocking conical surface; 316. guiding the arc surface; 317. a support bar; 318. a support member; 318a support disk; 318b, an interference rod; 320. a spraying mechanism; 321. a water delivery pipe; 322. a sealing connection; 322a, sealing the connector body; 322b, a snap ring; 322c, connecting a ring groove; 323. rotating the tube; 324. an atomizing nozzle; 325. an end cap; 330. a filter cartridge; 331. a cylindrical barrel; 332. a filtration pore; 340. a secondary filtering mechanism; 341. a connecting pipe; 342. a support; 343. a sprinkling member; 344. a support disc; 345. a secondary filter cartridge; 346. a dust collecting plate; 347. a dust collecting cylinder; 350. a collection mechanism; 351. an air guide cylinder; 352. a support bar; 353. a liquid collecting plate; 354. a drainage tube; 355. conducting a ring pipe; 356. a communication pipe is provided.

Detailed Description

In order that the objects and advantages of the invention will be more clearly understood, the following description is given in conjunction with the accompanying examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed.

As shown in fig. 1-22, the industrial dust removing equipment for environmental improvement comprises a filtering device 30 for wet settling of dust, a dust guiding device 10 respectively positioned at one side of the filtering device 30 and used for conveying air with dust into the filtering device 30, and a water conveying device 20 used for conveying liquid water into the filtering device 30, wherein the filtering device 30 is communicated with the dust guiding device 10 and the water conveying device 20, the filtering device 30 is vertically arranged, the top of the filtering device 30 is communicated with the outside, the bottom of the filtering device 30 is connected with a sewage collecting device, the water conveying device 20 is opened, the water conveying device 20 conveys liquid water into the filtering device 30, after the liquid water enters the filtering device 30, a part of the liquid water is changed into large water drops and sprayed out and does free falling body movement to form a rain curtain, the other part of the liquid water is changed into mist-shaped small water drops and sprayed out and is accumulated into a cloud-shaped small water drops in the filtering device 30, the inner cavity of the filtering device 30 is blocked, at the moment, the dust guiding device 10 is started, the outside air with dust is guided into the filtering device 30 by the dust guiding device 10, the rain curtain adsorbs part of dust in the air and carries the dust to fall into the dirt collecting device, the air carries the rest dust to collide into a cloud cluster consisting of mist water drops, the cloud cluster filters the flowing air, the dust in the air adsorbs the mist water drops, because the water delivery device 20 continuously conveys liquid water, the mist-like small water drops in the inner cavity of the filtering device 30 continuously generate, the mist-like small water drops with dust collide with each other in a limited space and are condensed into large water drops under the adsorption action of the dust, the large water drops carrying the dust freely fall under the action of self gravity, the large water drops enter the sewage collecting device through the bottom of the filtering device 30, the filtered air is discharged from the top of the filtering device 30, and the air is filtered through the steps.

The invention adopts wet sedimentation, and has the advantages of high dust removal efficiency up to 99.9%, particle size of dust removal less than 70 μm, simple structure, low investment, high dust removal efficiency, simple operation, and obvious advantages for treating high-temperature, high-humidity and toxic dust-containing gas.

Preferably, the liquid water delivered by the water delivery device 20 may also be mixed with a desulfurization solution, preferably an organic amine desulfurization solution, and the liquid water delivered by the water delivery device 20 is adjusted in proportion, so as to absorb and treat sulfides in the ambient air.

As shown in fig. 9, the filtering device 30 includes a filtering cylinder 330 vertically disposed and connected to the dirt collecting device, and a spraying mechanism 320 coaxially disposed in an inner cavity of the filtering cylinder 330 and spraying mist-like small water droplets to the inner cavity of the filtering cylinder 330, the spraying mechanism 320 penetrates through the filtering cylinder 330 and is connected to the water delivery device 20, the dust guiding device 10 is connected to the bottom of the circumferential surface of the filtering cylinder 330 through a bent pipe, the water delivery device 20 is turned on, the water delivery device 20 delivers liquid water to the spraying mechanism 320, the spraying mechanism 320 sprays a part of the liquid water into large water droplets and performs a free falling motion to form a rain curtain, another part of the liquid water is converted into mist-like small water droplets and is sprayed out, the mist-like small water droplets are collected into a cloud shape and block the inner cavity of the filtering cylinder 330, at this time, the dust guiding device 10 is turned on, the dust guiding device 10 introduces the external air with dust into the inner cavity, because the introduced air has an initial speed under the action of the dust guiding device 10, the air flows from the bottom of the inner cavity of the filter cartridge 330 to the top of the inner cavity of the filter cartridge 330, the air passes through the cloud-shaped small water drops, the dust in the air adsorbs the small water drops, the small water drops with the dust are increased because the spraying mechanism 320 continuously sprays the fog-shaped small water drops, the small water drops with the dust collide with each other in a limited space and are condensed into large water drops under the adsorption action of the dust, the large water drops do free-falling body movement under the action of self gravity, the large water drops fall into the dirt collecting device through the bottom of the inner cavity of the filter cartridge 330, the air passes through the filtration of the cloud-shaped small water drops, and the clean air is discharged from the top of the filter.

As shown in fig. 12, the filter cartridge 330 includes a hollow cylindrical body 331 having an opening at the top for communicating with the outside and a bottom for communicating with the dirt collecting device.

The spraying mechanism 320 comprises a rotating pipe 323 coaxially arranged in the inner cavity of the filter cartridge 330 and used for conveying liquid water, the rotating pipe 323 is fixedly connected with the filter cartridge 330 through a fastening member, the bottom of the rotating pipe 323 is connected with the water delivery device 20 through a conduit and receives the liquid water conveyed by the water delivery device 20, an atomizing nozzle 324 which changes one part of the liquid water into large water drops to be sprayed out and atomizes the other part of the liquid water to be sprayed out and sprays the large water drops and the atomized small water drops to the inner wall of the filter cartridge 330 is arranged at the top of the rotating pipe 323, the rotating pipe 323 receives the liquid water conveyed by the water delivery device 20 through the conduit and conveys the liquid water to the atomizing nozzle 324, the atomizing nozzle 324 changes one part of the liquid water into large water drops to be sprayed out to form a rain curtain, the other part of the liquid water to be atomized small water drops to be sprayed out and form a cloud cluster in the inner cavity of the filter cartridge 330, the bottom, the air that has the dust is by the direction of the guide of upper motion of following the cartridge filter 330 inner chamber down under the guide effect of return bend, the rain curtain is met to the air and is adsorbed the partial dust in the air, the rain curtain carries the dust and falls into the dirty device of collection, the air carries surplus dust and collides the cloud cluster, the dust adsorbs the water droplet, atomizing nozzle 324 sprays the water droplet continuously at this in-process atomizing, the water droplet that has the dust increases, the water droplet that has the dust collides each other in limited space and agglomerates into big water droplet under the adsorption of dust, big water droplet is free falling body motion under the effect of self gravity, big water droplet falls into the dirty device of collection through cartridge filter 330 inner chamber bottom.

In order to increase atomizing nozzle 324's injection efficiency, make wet subside more high-efficient, atomizing nozzle 324 is provided with a plurality ofly and along the even interval distribution of circumferencial direction of swivelling joint pipe 323, but a plurality of atomizing nozzle 324 quick spray atomizing water droplet and quick in the filter cartridge 330 intracavity form the atomizing cloud cluster, and the distribution of atomizing water droplet in the cloud cluster is comparatively even, the density increase of rain curtain is favorable to wet quick production of subsiding, has strengthened filtration efficiency.

In order to further improve the wet settling efficiency and increase the dust filtering efficiency, the inner cavity of the filter cartridge 330 is further provided with a speed reduction mechanism 310 for reducing the speed of the air with dust conveyed by the dust guiding device 10, the speed reduction mechanism 310 can prevent the air from blowing away the atomized cloud cluster and the rain curtain due to overlarge flow speed, thereby avoiding the occurrence of the condition that the wet settling efficiency is reduced due to the dispersion of the atomized cloud cluster and the rain curtain, and after the speed reduction mechanism 310 is arranged, the speed of conveying the air by the dust guiding device 10 can be improved, the amount of the air conveyed by the dust guiding device 10 in unit time is increased, the amount of the dust conveyed to the inner cavity of the filter cartridge 330 in unit time is increased, the amount of the dust adsorbing small water drops is increased, the probability of mutual collision of the dust with the small water drops in unit time in a limited space is increased, and the dust removing efficiency is improved.

The speed reducing mechanism 310 is coaxially arranged in the inner cavity of the filter cartridge 330, the top of the speed reducing mechanism 310 is communicated with the inner cavity of the filter cartridge 330, the spraying mechanism 320 is coaxially arranged in the speed reducing mechanism 310 in a penetrating manner, the spraying part of the spraying mechanism 320 extends out of the top of the speed reducing mechanism 310 and is positioned in the inner cavity of the filter cartridge 330, the dust guiding device 10 is communicated with the bottom of the speed reducing mechanism 310 through the wall of the filter cartridge 330, the water delivery device 20 is communicated with the spraying mechanism 320, the water delivery device 20 delivers the liquid water to the spraying mechanism 320, the spraying mechanism 320 converts a part of the liquid water into large water drops to be sprayed out and freely falls to form a rain curtain, the other part of the liquid water into small water drops to be sprayed out, the small water drops are accumulated into a cloud shape and block the inner cavity of the filter cartridge 330, at the time, the dust guiding device 10 is opened, the air with dust outside is introduced into the speed reducing mechanism 310 through the dust, the air after the speed reduction flows into the inner cavity of the filter cartridge 330 from the top of the speed reduction mechanism 310, the rain curtain collides into the air and adsorbs part of dust in the air, the rain curtain carries the dust to fall into the sewage collection device, the air after the speed reduction continues to move vertically upwards along the inner cavity of the filter cartridge 330 and collides into the cloud cluster, the dust in the air adsorbs water drops in the cloud cluster, and the water drops with the dust collide with each other to form large water drops and do free falling motion under the action of self gravity to fall into the sewage collection device.

As shown in fig. 12-14 and 18-21, in detail, the decelerating mechanism 310 includes a decelerating casing 311 disposed coaxially with the inner cavity of the filter cartridge 330, the bottom of the decelerating casing 311 is connected to the dust guiding device 10, the top of the decelerating casing 311 is disposed with an opening communicated with the inner cavity of the filter cartridge 330, a disc 313 fixedly connected to the decelerating casing 311 is coaxially matched at the middle position of the inner cavity of the decelerating casing 311, the disc 313 divides the inner cavity of the decelerating casing 311 into two chambers, which are an upper chamber above the disc 313 and a lower chamber below the disc 313, a plurality of communicating holes communicating the upper chamber and the lower chamber are disposed on the disc 313, a support 318 communicating the lower chamber and the dust guiding device 10 is coaxially and fixedly connected at the bottom of the decelerating casing 311, a fan 312 capable of rotating around its own axis is coaxially clamped between the support 318 and the disc 313, and the fan 312 is driven to rotate around its own axis when air passes through the fan 312, partial kinetic energy of the air is converted into the kinetic energy of the fan 312, the kinetic energy of the air is reduced according to the law of energy conservation, the flow speed of the air is reduced under the condition that the air quality is not changed, and the flow speed of the air entering the filtering device 30 can be further improved by arranging the speed reducing mechanism 310 under the speed critical value of the air blowing rain curtain and the atomized cloud cluster, so that the flow of the air in unit time is improved.

The rotating pipe 323 is coaxially arranged through the support member 318, the disc 313 and the fan 312, the rotating pipe 323 can rotate around the axis of the rotating pipe 323, the rotating pipe 323 is movably connected with the support member 318 and the disc 313, the fan 312 is fixedly arranged outside the rotating pipe 323, the fan 312 can drive the rotating pipe 323 to rotate around the axis of the fan, the top of the rotating pipe 323 extends out of the inner cavity of the speed reduction shell 311 and is provided with an atomizing nozzle 324 which sprays towards the inner wall of the filter cartridge 330, the bottom of the rotating pipe 323 is communicated with the water delivery device 20 by arranging the water delivery pipe 321, the water delivery pipe 321 extends from the water delivery device 20 and penetrates through the filter cartridge 330 to be connected with the bottom of the rotating pipe 323, the water delivery pipe 321 is kept in sealing connection with the rotating pipe 323 by arranging the sealing connection member 322, the rotating pipe 323 is movably connected with the sealing connection member 322 and the rotating pipe 323 can rotate around the axis of the rotating pipe itself, the water outlet end of the water delivery pipe, the air passes through the fan 312 and drives the fan 312 to rotate around the axis of the fan 312, the fan 312 drives the rotating pipe 323 to rotate around the axis of the fan 312, partial kinetic energy of the air is converted into kinetic energy of the fan 312, the kinetic energy of the air is reduced according to the law of conservation of energy, the speed of the air is reduced under the condition that the mass of the air is unchanged, and the air slowly flows into the inner cavity of the filter cartridge 330.

Specifically, the supporting member 318 includes a supporting plate 318a coaxially matched with the speed reduction housing 311, and an abutting rod 318b coaxially disposed on the supporting plate 318a and extending toward one side of the fan 312, wherein one end of the abutting rod 318b far away from the supporting plate 318a abuts against the fan 312, a plurality of connecting holes for connecting the lower chamber and the dust guiding device 10 are formed in the supporting plate 318a, and the dust guiding device 10 pushes the air with dust to enter the lower chamber through the connecting holes.

The sealing connector 322 comprises a sealing connector body 322a, the sealing connector body 322a is a hollow cylindrical cylinder with two open ends, a snap ring 322b is coaxially arranged in the middle of an inner cavity of the sealing connector body 322a, a circulation hole is arranged in the center of the snap ring 322b, the snap ring 322b divides the inner cavity of the sealing connector body 322a into two chambers which are an upper connecting chamber above the snap ring 322b and a lower connecting chamber below the snap ring 322b respectively, the lower connecting chamber and the upper connecting chamber are communicated through the circulation hole in the center of the snap ring 322b, a communication ring groove 322c is coaxially arranged on the inner circular surface of the lower connecting chamber, one end of the water pipe 321 connected with the sealing connector 322 is provided with an external step matched with the communication ring groove 322c, the bottom of the sealing connector body 322a is also coaxially provided with an end cover 325 for the external step on the water pipe 321, the one end that raceway 321 set up external step matches the joint and connects the cavity under, and external step matches the joint with switch-on annular 322c, and end cover 325 contradicts external step and keeps away from the one end of snap ring 322b and is connected with sealing connection spare body 322a through the fastener, and rotatory pipe 323 matches and pegs graft at last connection cavity and can rotate around self axis.

In order to further reduce the flow rate of air in the inner cavity of the filter cartridge 330, a secondary deceleration member is disposed on the top of the deceleration housing 311, the secondary deceleration member includes a guiding conical surface 314 disposed at the top opening of the deceleration housing 311, the guiding conical surface 314 extends from the circumferential direction of the top opening of the deceleration housing 311 to the oblique lower side near the inner wall of the filter cartridge 330, the distance between the two inclined surfaces of the guiding conical surface 314 gradually increases from top to bottom, the guiding conical surface 314 extends to the inner wall of the filter cartridge 330 and is fixedly connected with the inner wall of the filter cartridge 330, the guiding conical surface 314 divides the inner cavity of the filter cartridge 330 into two parts, which are an upper filter chamber located above the guiding conical surface 314 and a lower filter chamber located below the guiding conical surface 314, the lower filter chamber is formed by the inner wall of the filter cartridge 330, the guiding conical surface 314 and the outer wall of the deceleration housing 311 enclosing together, a filter hole 332 communicating the upper filter chamber and the lower filter chamber, the large water drops carrying dust in the upper filtering chamber enter the lower filtering chamber through the filtering holes 332 and fall into the dirt collecting device, in order to increase the amount of the large water drops carrying dust passing through the filtering holes 332 in unit time, the filtering holes 332 are provided with a plurality of supporting rods 317 which are uniformly distributed at intervals along the circumferential direction of the inner wall of the filtering cylinder 330, the opening end of the decelerating shell 311 is provided with a plurality of supporting rods 317 along the circumferential direction, the top of the supporting rods 317 is provided with a blocking conical surface 315 matched with the guiding conical surface 314, the blocking conical surface 315 extends from the central axis of the decelerating shell 311 to the oblique lower part close to the inner wall of the filtering cylinder 330, the distance between the two opposite inclined surfaces of the blocking conical surface 315 is gradually increased from the upper part to the lower part, a guiding channel is formed between the blocking conical surface 315 and the guiding conical surface 314, and the air entering the inner cavity of the decelerating shell 311 collides with the blocking conical surface 315 after, the flow rate of the air is further reduced, the air after the speed reduction enters the upper filtering chamber through one part of the guide channel, the other part of the air enters the lower filtering chamber through the filtering holes 332, the air pressure of the lower filtering chamber is increased, and when the lower filtering chamber is under high pressure, the air entering the guide channel from the upper chamber flows into the upper filtering chamber completely.

In order to prevent the air from rebounding when colliding against the arresting conical surface 315, avoid the reverse movement of the air and reduce the conveying efficiency, a guide arc surface 316 is further arranged on the surface of the arresting conical surface 315 facing the upper chamber, the distance between the guide arc surface 316 and the two opposite inclined surfaces is gradually reduced from the top to the bottom, the air in the upper chamber collides against the arresting conical surface 315 under the guide of the guide arc surface 316, the air further decelerates and enters the guide channel, the reverse movement of the air is avoided, the conveying capacity of the air in unit time is enhanced, and the filtering efficiency is improved.

In order to further enhance the filtering effect of the present invention and reduce the dust content carried by the air discharged from the outside, a secondary filtering mechanism 340 for performing secondary filtering on the filtered air is further disposed at the air outlet of the filter cartridge 330, and the dust content in the air can be greatly reduced by performing secondary filtering on the air with dust, so that the air discharged into the outside is fresher.

The secondary filter mechanism 340 includes a secondary filter cartridge 345 coaxially disposed at one end of the exhaust port of the filter cartridge 330, a sprinkling member 343 coaxially disposed in an inner cavity of the secondary filter cartridge 345 and used for spraying water mist, and a support plate 344 coaxially disposed in an inner cavity of the secondary filter cartridge 345 and located above the sprinkling member 343, a support 342 for supporting the sprinkling member 343 is disposed on the secondary filter cartridge 345, a connection pipe 341 coaxially penetrates through the sprinkling member 343, the connection pipe 341 is communicated with the sprinkling member 343, the connection pipe 341 can rotate around its own axis and drive the sprinkling member 343 to rotate around its own axis, a top of the connection pipe 341 passes through the sprinkling member 343 and is movably connected with the support plate 344, a bottom of the connection pipe 341 is connected with a top of the rotation pipe 323, the connection pipe 341 can receive water flow delivered by the rotation pipe 323, the sprinkling member 343 receives liquid water delivered by the connection pipe 341 and atomizes and sprays the liquid water to further wet-settle the, the supporting plate 344 is matched with the inner cavity of the secondary filter cylinder 345, a plurality of through holes penetrating through the thickness of the supporting plate 344 are formed in the supporting plate 344, a hollow dust collecting cylinder 347 is coaxially arranged at the top of the supporting plate 344, the upper end and the lower end of the dust collecting cylinder 347 are arranged in a grid shape, a plurality of dust collecting plates 346 which are closely arranged are arranged in the inner cavity of the dust collecting cylinder 347, the dust collecting plates 346 are arranged in an S-shaped bent shape from top to bottom, when air moves from the bottom to the top of the dust collecting cylinder 347, the bending points of the dust collecting plates 346 can intercept dust remained in the air, a plurality of vent holes communicated with the outside are formed in the top of the secondary filter cylinder 345 so as to facilitate the filtered air to be discharged, the connecting pipe 341 receives liquid water conveyed by the rotating pipe 323 and transmits the liquid water to the sprinkling member 343, the sprinkling member 343 sprinkles small water drops to settle and wet the passing air, and, the connecting pipe 341 drives the sprinkling member 343 to rotate around its own axis, so that the water mist sprayed from the sprinkling member 343 is distributed more uniformly in the inner cavity of the secondary filter cylinder 345, which is beneficial to the overall filtration of dust in the air, the air passes through the sprinkling member 343 and enters the inner cavity of the dust collecting cylinder 347 through the through holes, the air flows from the gaps between the dust collecting plates 346 to the top of the secondary filter cylinder 345, the dust in the air is retained at the bending points of the dust collecting plates 346, and the air after secondary filtration is discharged into the outside from the exhaust holes.

Specifically, watering component 343 includes the annular honeycomb duct coaxial with connecting pipe 341, it has the stay tube of a plurality of intercommunication connecting pipe 341 and annular honeycomb duct to extend towards connecting pipe 341 along annular honeycomb duct circumferencial direction, it has a plurality of atomizer to spray the water smoke towards annular honeycomb duct axis direction still evenly arrayed along the circumferencial direction on the annular honeycomb duct, connecting pipe 341 carries liquid water to annular honeycomb duct through the stay tube, liquid water in the annular honeycomb duct passes through atomizer and rotates towards the central axis direction atomizing blowout of annular honeycomb duct, meanwhile connecting pipe 341 passes through the stay tube and drives annular honeycomb duct around self axis rotation, atomizer on the annular honeycomb duct rotates along with the rotation of annular honeycomb duct, make atomizer spraying water smoke distribution more even, be favorable to improving filtration efficiency.

The dust guiding device 10 includes a bracket 110 disposed at one side of the filtering device 30, a fan 120 is disposed on the bracket 110, an impeller 140 is coaxially connected to an output end of the fan 120, a packaging shell 150 and an installation shell 170 for wrapping the impeller 140 are also disposed on the bracket 110, the packaging shell 150 and the installation shell 170 form a hollow cylindrical sealing shell with a sealed space, a dust guiding pipe 160 is connected to a circumferential surface of the sealing shell, the sealing shell is communicated with a bottom of the speed reducing shell 311 through the dust guiding pipe 160, the sealing shell is further provided with a vent 130 which is coaxial with the output end of the fan 120 and is communicated with an inner cavity of the sealing shell and the outside, the fan 120 is started, the output end of the fan 120 drives the impeller 140 to rotate around its axis, the impeller 140 blows air in the inner cavity of the sealing shell into the inner cavity of the speed reducing shell 311 through the dust guiding pipe 160, the air pressure in the inner cavity of the sealing shell is reduced, the air with dust entering the inner cavity of the sealed shell enters the inner cavity of the deceleration shell 311 through the dust guide pipe 160 under the action of the impeller 140.

The water delivery device 20 includes a water tank 210 for storing liquid water, a water pumping pipe 250 and a water outlet pipe 230, the water tank 210 stores liquid water, a water pump 220 connected to an inner cavity of the water tank 210 is disposed on the water tank 210, the water outlet pipe 230 and the water pumping pipe 250 are connected to the water pump 220, the water pumping pipe 250 extends to the bottom of the water tank 210, the water outlet pipe 230 is connected to a water delivery pipe 321, the water pump 220 can deliver the liquid water to a rotating pipe 323 through the water outlet pipe 230 and the water delivery pipe 321, the water tank 210 is further provided with a receiving pipe 240 connected to the inner cavity of the water tank 210 for receiving an external water source, the water pump 220 is started by injecting water into the inner cavity of the water tank 210 through the receiving pipe 240, and the water pump 220 sucks the liquid water in the water tank 210 through the water pumping pipe.

In order to reduce the waste of water resources and the total amount of sewage, the invention is arranged in a water circulation structure, specifically, a frame 290 is arranged on a water tank 210, a filtering device 30 is arranged on the frame 290, a filter cartridge 330 is vertically arranged on the frame 290, the inner cavity of the filter cartridge 330 is communicated with the inner cavity of the water tank 210, the inner cavity of the water tank 210 is also provided with a high-density filter screen 270 which divides the inner cavity of the water tank 210 into two chambers, the high-density filter screen 270 divides the inner cavity of the water tank 210 into two chambers, namely a left chamber 260 for storing clean liquid water and a right chamber 280 for storing sewage, the right chamber 280 is always filled with liquid water or the lowest liquid level in the right chamber 280 is higher than the highest height of the high-density filter screen 270, and a water pumping; firstly, the left chamber 260 is filled with clean liquid water through the receiving pipe 240, then the pipe orifice of the receiving pipe 240 is blocked by a rubber plug, the water pump 220 is started, the water pump 220 sucks the clean liquid water in the left chamber 260 through the water pumping pipe 250 and conveys the clean liquid water to the filtering device 30 through the water outlet pipe 230, the dust in the air adsorbed by the clean liquid water in the filtering device 30 is changed into water drops with dust, the water drops with dust enter the right chamber 280 under the guidance of the filter cartridge 330, the right chamber is always filled with liquid water, the liquid water in the right chamber prevents the left chamber 260 from being communicated with the outside, the clean liquid water in the left chamber 260 is conveyed out of the left chamber 260, the air pressure in the left chamber 260 is reduced, the sewage with dust in the right chamber 280 enters the left chamber 260 through the high-density filter screen 270 under the atmospheric pressure, the sewage with dust is changed into cleaner liquid water under the filtering action of the high-density filter screen 270 and is conveyed to the filtering device 30 by the water pump 220 to finish water conveying And (6) circulating.

The present invention further designs another water circulation implementation, which is different from the above water circulation implementation, in which a high-density filter 270 is horizontally disposed in the water tank 210, and the high-density filter 270 divides the water tank into an upper return cavity and a lower return cavity which are vertically disposed, the upper return cavity is used for collecting the wastewater flowing out from the filtering apparatus 30, the lower return cavity stores clean water (clean water injected from the outside or water purified by the upper return cavity), the water tank 210 is provided with a receiving pipe 240 which is communicated with the lower return cavity and can inject clean water into the lower return area, the upper return cavity is filled with liquid water and realizes water sealing to the lower return cavity, and the water pumping pipe 250 is used for pumping clean water in the lower return cavity; the receiving pipe 240 is sealed and the water pump 220 is started, so that negative pressure is generated in the lower backflow cavity, and under the action of external air pressure, liquid water in the upper backflow cavity is pushed to flow into the lower backflow cavity after being filtered by the high-density filter screen 270.

In order to enhance the filtering effect, so that the dust content of the sewage entering the left chamber 260/lower reflux cavity from the right chamber 280/upper reflux cavity is further reduced, preferably, the high-density filter screen 270 comprises a filter frame matched with the inner cavity of the water tank 210, a high-density activated carbon filter element is arranged in the filter frame, the outer layer of the activated carbon filter element is wrapped by two layers of polypropylene superfine fiber felts, particles larger than 10-20 micrometers in the sewage can be intercepted, the activated carbon filter element has the double functions of filtering and purifying, the activated carbon filter element has developed pores, strong adsorption capacity and high filtering speed, the peculiar smell in the sewage can be effectively removed, and the working environment is improved.

More perfectly, in order to reduce the water content of the air exhausted to the outside and reduce the water loss, the invention is also provided with a collecting mechanism 350 for collecting the water in the air exhausted to the outside, the collecting mechanism 350 is communicated with the right cavity 280/upper backflow cavity and conveys the collected water to the right cavity 280/upper backflow cavity, the water loss is reduced, the replacement frequency of the liquid water in the water tank 210 is reduced, and the workload of workers is reduced.

The collecting mechanism 350 comprises a collecting member, the collecting member comprises an air guide cylinder 351 which is communicated with the inner cavity of the secondary filter cylinder 345 through an air vent and is vertically arranged, a conical liquid collecting plate 353 arranged at the top of the air guide cylinder 351, and a plurality of supporting rods 352 which are arranged between the liquid collecting plate 353 and the air guide cylinder 351 and are uniformly arranged at intervals along the circumferential direction of the air guide cylinder 351, the distance between two opposite inclined planes of the liquid collecting plate 353 is gradually increased from top to bottom, a gap between two adjacent supporting rods 352 is a discharge hole, the bottom of the air guide cylinder 351 is also provided with a vertically downward extending communicating pipe 356 which is communicated with the right chamber 280/the upper return cavity, air enters the air guide cylinder 351 through the air vent, the air vertically moves upwards along the inner cavity of the air guide cylinder 351, the air impacts the liquid collecting plate 353 and is discharged to the outside through the discharge hole, and water vapor in the air, the water vapor on the liquid collecting plate 353 is gradually increased and is collected into water drops, the water drops are separated from the liquid collecting plate 353 and vertically and downwards drop under the action of self gravity, and the water drops fall into the right chamber 280/upper backflow chamber through the inner cavity of the gas guide cylinder 351 and the inner cavity of the communicating pipe 356, so that the consumption of liquid water is reduced, and the replacement frequency of the liquid water in the water tank 210 is reduced.

In order to increase the discharge amount of air in unit time and improve the filtration efficiency, a plurality of collecting members are arranged and evenly arranged at intervals along the circumferential direction of the secondary filter cylinder 345, the bottom of the plurality of gas cylinders 351 is vertically provided with a drainage tube 354 communicated with the inner cavity of the gas cylinders 351, the bottom of the drainage tube 354 is connected with a conduction ring tube 355 coaxial with the secondary filter cylinder 345, the conduction ring tube 355 is provided with a communication pipe 356 vertically extending downwards and communicated with the right chamber 280/upper reflux cavity, water drops enter the drainage tube 354 and the communication pipe 356 from the plurality of collecting members and enter the right chamber 280/upper reflux cavity through the communication pipe 356, the discharge amount of air in unit time is increased, and the filtration efficiency is improved.

s1: firstly, the left chamber 260/lower reflux chamber is filled with clean liquid water through the receiving pipe 240, then the pipe orifice of the receiving pipe 240 is blocked by a rubber plug, the water pump 220 is started, the water pump 220 sucks the clean liquid water in the left chamber 260/lower reflux chamber through the water pumping pipe 250 and conveys the clean liquid water to the water conveying pipe 321 through the water outlet pipe 230, the liquid water is conveyed to the atomizing nozzle 324 through the water conveying pipe 321 and the rotating pipe 323, the atomizing nozzle 324 converts a part of the liquid water into large water drops to be sprayed out to form a rain curtain, the other part of the liquid water is atomized and sprayed out, atomized small water drops form a cloud cluster in the inner cavity of the filter cartridge 330, and the rest of the liquid water is sprayed out by the atomizing nozzle through the connecting pipe 341, the support pipe and the annular flow guide pipe to;

s2: at this time, the fan 120 is started, the output end of the fan 120 drives the impeller 140 to rotate around its axis, the impeller 140 blows the air in the inner cavity of the sealed shell into the inner cavity of the speed reduction shell 311 through the dust guide tube 160, the air pressure in the inner cavity of the sealed shell is reduced, the air with dust enters the inner cavity of the sealed shell through the vent 130 under the action of atmospheric pressure, the air with dust entering the inner cavity of the sealed shell passes through the dust guide tube 160 and passes through the connecting hole on the support plate 318a to enter the lower chamber of the speed reduction shell 311 under the action of the impeller 140, the air flows to the lower chamber from the lower chamber, the air passes through the fan 312 and drives the fan 312 to rotate around its axis, the fan 312 drives the rotating tube 323 and the connecting tube 341 to rotate around its axis, the rotating tube 323 drives the atomizing nozzle 324 to rotate, the atomizing nozzle 324 uniformly sprays large water droplets and atomized water droplets to the upper filtering chamber to distribute, the water curtain and the atomized cloud cluster sprayed by the atomizing spray head on the annular flow guide pipe along with the rotation are distributed more uniformly, partial kinetic energy of the air is converted into the kinetic energy of the fan 312, the decelerated air flows to the stopping conical surface 315 from the upper chamber and collides with the stopping conical surface 315 under the guidance of the guide arc surface 316, the flow rate of the air is further reduced, one part of the decelerated air enters the upper filtering chamber through the guide channel, the other part of the decelerated air enters the lower filtering chamber through the filtering hole 332, the air pressure of the lower filtering chamber is increased, and when the lower filtering chamber is at high pressure, all the air entering the guide channel from the upper chamber flows into the upper filtering chamber;

s3: the air entering the upper filtering chamber collides with the rain curtain, large water drops in the rain curtain adsorb dust in the air and collide against the blocking conical surface 315 and the filtering holes 332, large water drops colliding against the blocking conical surface 315 flow along the inclined surface of the blocking conical surface 315 and fall from the edge of the blocking conical surface 315 to the filtering holes 332 under the action of self gravity, the air carrying residual dust collides into the atomized cloud cluster, the dust adsorbs small water drops in the cloud cluster, the atomized small water drops are continuously sprayed by the atomizing nozzles 324, the small water drops carrying the dust are increased and collide with each other to be condensed into large water drops, the large water drops fall on the inclined surface of the blocking conical surface 315 or in the filtering holes 332 under the action of self gravity, the large water drops carrying the dust are gathered near the filtering holes 332 and fall into the lower filtering chamber through the filtering holes 332 and finally fall into the right chamber 280/upper backflow chamber, and the large water drops can also pass through the air carrying the dust in the lower filtering chamber 280/upper backflow chamber in the process of the right filtering chamber 280/upper backflow chamber Filtering;

s4: the primarily filtered air flows into the inner cavity of the secondary filter cylinder 345 from the upper filter chamber, the primarily filtered air faces the second layer of rain curtain and the second layer of atomized cloud cluster and forms large water drops with dust, the large water drops with dust pass through the inner cavity of the secondary filter cylinder 345, the upper filter chamber, the filter holes 332 and the lower filter chamber under the action of self gravity and finally fall into the right chamber 280/upper return flow cavity, the purified air enters the inner cavity of the dust collection cylinder 347 through the through holes, the air flows to the top of the secondary filter cylinder 345 from gaps among the dust collection plates 346, and the dust in the air is retained at the bending points of the dust collection plates 346;

s5: air enters the air guide cylinder 351 through the air exhaust hole, the air vertically moves upwards along the inner cavity of the air guide cylinder 351, the air impacts the liquid collection plate 353 and is exhausted to the outside through the air exhaust hole, water vapor in the air is retained on the liquid collection plate 353 in the process that the air impacts the liquid collection plate 353, the water vapor on the liquid collection plate 353 is gradually increased and is collected into water drops, the water drops are separated from the liquid collection plate 353 under the action of self gravity and vertically and downwards drip, and the water drops fall into the right cavity 280/upper backflow cavity through the inner cavity of the air guide cylinder 351, the drainage tube 354, the conduction ring tube 355 and the inner cavity of the communication;

s6: the sewage with dust is gathered in the right chamber 280/upper backflow cavity, in the process that the water pump 220 pumps the pure liquid water in the left chamber 260/lower backflow cavity, the air pressure in the left chamber 260/lower backflow cavity is reduced, the sewage with dust in the right chamber 280/upper backflow cavity enters the left chamber 260/lower backflow cavity through the high-density filter screen 270 under the action of the atmospheric pressure, and the sewage with dust is changed into the cleaner liquid water under the filtering action of the high-density filter screen 270 and is conveyed to the filtering device 30 by the water pump 220 to complete water circulation.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art, after learning the present disclosure, can make several equivalent changes and substitutions without departing from the principle of the present invention, and these equivalent changes and substitutions should also be considered as belonging to the protection scope of the present invention.

Claims

1. The sulfide purification treatment method of industrial waste gas comprises the following steps:

the filter device comprises a filter cartridge which is vertically arranged and is connected with the sewage collecting device, and a spraying mechanism which is coaxially arranged in the inner cavity of the filter cartridge and can spray mist-shaped water drops to the inner cavity of the filter cartridge, wherein the spraying mechanism penetrates through the filter cartridge and is connected and communicated with the water delivery device, and the dust guiding device is connected and communicated with the bottom of the circumferential surface of the filter cartridge through a bent pipe;

the filter cartridge comprises a cylindrical barrel, wherein the hollow top of the interior of the cylindrical barrel is provided with an opening communicated with the outside, and the bottom of the cylindrical barrel is communicated with the sewage collecting device;

the spraying mechanism comprises a rotating pipe which is coaxially arranged in the inner cavity of the filter cylinder and used for conveying liquid water, the rotating pipe is fixedly connected with the filter cylinder through a fastening member, the bottom of the rotating pipe is connected and communicated with the water conveying device through a guide pipe and receives the liquid water conveyed by the water conveying device, and the top of the rotating pipe is provided with an atomizing nozzle which is used for converting one part of the liquid water into large water drops to be sprayed out, atomizing the other part of the liquid water to be sprayed out and spraying the large water drops and the atomized small water drops to the inner wall of the filter cylinder;

the inner cavity of the filter cartridge is also provided with a speed reduction mechanism for reducing the speed of the air with dust conveyed by the dust guiding device, the speed reduction mechanism comprises a speed reduction shell which is coaxially arranged with the inner cavity of the filter cartridge, the bottom of the speed reduction shell is communicated with the dust guiding device, the top of the speed reduction shell is provided with an opening which is communicated with the inner cavity of the filter cartridge, the middle position of the inner cavity of the speed reduction shell is coaxially matched with a disc which is fixedly connected with the speed reduction shell, the disc divides the inner cavity of the speed reduction shell into two chambers which are an upper chamber positioned above the disc and a lower chamber positioned below the disc respectively, the disc is provided with a plurality of communication holes which are communicated with the upper chamber and the lower chamber, the bottom of the speed reduction shell is coaxially and fixedly connected with a support piece which is communicated with the lower chamber and the dust guiding device, a fan which can rotate around the axis of the support, the rotating pipe can rotate around the axis of the rotating pipe, the rotating pipe is movably connected with the supporting piece and the disc, the fan is fixedly sleeved outside the rotating pipe, the fan can drive the rotating pipe to rotate around the axis of the rotating pipe, the top of the rotating pipe extends out of the inner cavity of the speed reduction shell and is provided with an atomizing nozzle which sprays towards the inner wall of the filter cylinder, the bottom of the rotating pipe is communicated with the water delivery device through a water delivery pipe, the water delivery pipe extends from the water delivery device and penetrates through the filter cylinder to be connected with the bottom of the rotating pipe, and the water delivery pipe is kept in sealing connection with the rotating pipe through a;

the top of the decelerating shell is provided with a secondary decelerating component, the secondary decelerating component comprises a guiding conical surface arranged at the top opening of the decelerating shell, the guiding conical surface extends from the circumferential direction of the top opening of the decelerating shell to the oblique lower part close to the inner wall of the filter cylinder, the distance between two opposite inclined planes of the guiding conical surface is gradually increased from the top to the bottom, the guiding conical surface extends to the inner wall of the filter cylinder and is fixedly connected with the inner wall of the filter cylinder, the guiding conical surface divides the inner cavity of the filter cylinder into two parts, namely an upper filtering chamber positioned above the guiding conical surface and a lower filtering chamber positioned below the guiding conical surface, the lower filtering chamber is formed by the inner wall of the filter cylinder, the guide conical surface and the outer wall of the speed reduction shell are formed in an enclosing mode, a plurality of filtering holes communicated with the upper filtering chamber and the lower filtering chamber are formed between the guide conical surface and the inner wall of the filter cylinder, and the filtering holes are uniformly distributed at intervals along the circumferential direction of the inner wall of the filter cylinder;

the opening end of the speed reducing shell is provided with a plurality of support rods along the circumferential direction, the top of each support rod is provided with a stopping conical surface matched with the guide conical surface, the stopping conical surface extends from the central axis of the speed reducing shell to the oblique lower part close to the inner wall of the filter cylinder, the distance between two opposite inclined surfaces of the stopping conical surface is gradually increased from top to bottom, a guide channel is formed between the stopping conical surface and the guide conical surface, a guide cambered surface is also arranged on the surface of the stopping conical surface facing the upper cavity, and the distance between the guide cambered surface and the two opposite inclined surfaces is gradually reduced from top to bottom;

the air outlet of the filter cartridge is provided with a secondary filtering mechanism for carrying out secondary filtering on the filtered air, the secondary filtering mechanism comprises a secondary filter cartridge coaxially arranged at one end of the air outlet of the filter cartridge, a sprinkling member coaxially arranged in an inner cavity of the secondary filter cartridge and used for spraying water mist, and a supporting disc coaxially arranged in the inner cavity of the secondary filter cartridge and positioned above the sprinkling member, a bracket for supporting the sprinkling member is arranged on the secondary filter cartridge, the sprinkling member coaxially penetrates through a connecting pipe which is communicated with the sprinkling member, the connecting pipe can rotate around the axis of the connecting pipe and drives the sprinkling member to rotate around the axis of the connecting pipe, the top of the connecting pipe penetrates through the sprinkling member to be movably connected with the supporting disc, the bottom of the connecting pipe is communicated with the top of the rotating pipe, the supporting disc is matched with the inner cavity of the secondary filter, the top of the supporting disc is coaxially provided with a dust collecting cylinder with a hollow inner part, the upper end and the lower end of the dust collecting cylinder are arranged in a grid shape, the inner cavity of the dust collecting cylinder is provided with a plurality of dust collecting plates which are closely arranged, the dust collecting plates are arranged in an S-shaped bent shape from top to bottom, and the top of the secondary filter cylinder is provided with a plurality of exhaust holes communicated with the outside;

the sprinkling member comprises an annular flow guide pipe coaxial with the connecting pipe, a plurality of supporting pipes for communicating the connecting pipe with the annular flow guide pipe extend towards the connecting pipe along the circumferential direction of the annular flow guide pipe, and a plurality of atomizing nozzles for spraying water mist towards the axial direction of the annular flow guide pipe are uniformly arrayed on the annular flow guide pipe along the circumferential direction;

the water delivery device comprises a water tank for storing liquid water, a water pumping pipe and a water outlet pipe, wherein the water tank stores the liquid water, the water tank is provided with a water pump communicated with the inner cavity of the water tank, the water outlet pipe and the water pumping pipe are connected with the water pump, the water pumping pipe extends to the bottom of the water tank, the water outlet pipe is connected and communicated with the water delivery pipe, the water pump can deliver the liquid water to the rotary pipe through the water outlet pipe and the water delivery pipe, and the water tank is also provided with a receiving pipe communicated with the inner cavity of the water tank and;

the water tank is provided with a frame, the filtering device is arranged on the frame, the filtering cylinder is vertically arranged on the frame, the inner cavity of the filtering cylinder is communicated with the inner cavity of the water tank, the water tank is internally provided with a high-density filtering net which is horizontally arranged, the high-density filtering net divides the water tank into an upper backflow cavity and a lower backflow cavity which are vertically distributed, the upper backflow cavity is used for collecting waste water flowing out of the filtering device, the lower backflow cavity stores clean water, the water tank is provided with a receiving pipe which is communicated with the lower backflow cavity and can inject clean water into a lower backflow area, the upper backflow cavity is filled with liquid water and realizes water sealing of the lower backflow cavity, and the water pumping pipe is used for pumping;

the dust guiding device comprises a bracket arranged on one side of the filtering device, a fan is arranged on the bracket, the output end of the fan is coaxially connected with an impeller, a packaging shell and an installation shell which are used for wrapping the impeller are also arranged on the bracket, the packaging shell and the installation shell form a hollow cylindrical sealing shell with sealed space, a dust guide pipe is connected on the circumferential surface of the sealing shell, the sealing shell is communicated with the bottom of the speed reducing shell through the dust guide pipe, and a vent which is coaxial with the output end of the fan and is communicated with the inner cavity of the sealing shell and the outside is also arranged on the sealing shell;

s4: the sewage with dust gathers in last backward flow intracavity, and at the in-process that the pure liquid water extraction of water pump in with backward flow intracavity down, the atmospheric pressure in backward flow chamber reduces down, and the sewage with dust in last backward flow intracavity passes through the high density filter screen under the effect of atmospheric pressure and enters into backward flow chamber down, and the sewage with dust becomes comparatively clean liquid water under the filtering action of high density filter screen and is carried to filter equipment by the water pump and accomplishes the hydrologic cycle.

2. The sulfide purification treatment method of industrial waste gas according to claim 1, wherein the high-density filter screen comprises a filter frame matched with the inner cavity of the water tank, a high-density activated carbon filter element is arranged in the filter frame, and two layers of polypropylene ultrafine fiber felts are coated on the outer layer of the activated carbon filter element.