CN216295667U - Waste gas filtering device - Google Patents

Abstract

The utility model provides a waste gas filtering device which comprises a filtering tower, wherein a spraying and purifying device is arranged in the filtering tower, a circular filter cylinder is coaxially and fixedly arranged on the inner bottom wall of the filtering tower right below the spraying and purifying device, the upper end of the filter cylinder is arranged in an open manner, an annular cavity is formed between the outer wall of the filter cylinder and the inner wall of the filtering tower, the upper end opening of the annular cavity is covered, and a water outlet is formed in the bottom end of the annular cavity; a rotatable central rotating shaft is coaxially arranged in the filter cartridge, two support frames are symmetrically and fixedly arranged on the outer peripheral wall of the central rotating shaft, each support frame extends outwards from the outer peripheral wall of the central rotating shaft along the radial direction of the support frame, a vertical scraper is fixedly arranged at the outer end of each support plate, and the scrapers are abutted against the inner wall of the filter cartridge; and a sewage draining outlet is formed in the bottom end of the filter cartridge. The waste gas filtering device is simple and practical, and can clean dirt accumulated on the filter screen on line.

Description

Waste gas filtering device

Technical Field

The utility model relates to the field of environment-friendly equipment, in particular to a waste gas filtering device.

Background

At present, chemical plants, garbage disposal plants, sewage treatment plants, feed plants, fertilizer processing plants, livestock and poultry breeding and other industries are easy to generate waste gas in production, and a vertical filtering device is usually adopted to filter the waste gas. The existing vertical filtering device comprises a tower body, wherein a gas inlet is formed in the bottom of the tower body, a gas outlet is formed in the top of the tower body, a spraying and purifying device is arranged at the top of the tower body, a particle filtering layer is arranged in the middle of the inner side of the tower body, when the vertical filtering device is used, waste gas enters the inside of the tower body from the gas inlet and flows vertically upwards from bottom to top, passes through the particle filtering layer for filtering, and is finally discharged from the gas outlet, and meanwhile, when the waste gas flows in the tower body, the waste gas forms spraying liquid at the bottom of the tower under the spraying effect of the spraying and purifying device. Current vertical filter equipment sprays liquid through set up the filter wheel in filtering tower bottom and filters and purifies, filter the wheel and be radial radiation distribution and form by many active carbon filter screens, but current vertical filter equipment the filter wheel structure is complicated, and is with high costs to, need shut down when blockking up and change the active carbon filter screen, influence work efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a simple and practical waste gas filtering device which can clean dirt accumulated on a filter screen on line.

The technical scheme for realizing the purpose of the utility model is as follows: a waste gas filtering device comprises a filtering tower, wherein an air inlet and an air outlet are formed in the filtering tower, the air outlet is positioned above the air inlet, a spraying and purifying device is arranged in the filtering tower, the spraying and purifying device is positioned above the air inlet and below the air outlet, a circular filter cylinder is coaxially and fixedly arranged on the inner bottom wall of the filtering tower, the filter cylinder is positioned below the air inlet, the upper end of the filter cylinder is arranged in an open mode, an annular cavity is formed between the outer wall of the filter cylinder and the inner wall of the filtering tower, the upper end opening of the annular cavity is covered by an annular sealing plate, and a water outlet is formed in the bottom wall of the filtering tower at the bottom end of the annular cavity; a central rotating shaft is coaxially arranged in the filter cartridge, the lower end of the central rotating shaft extends out of the filter tower and is driven by a motor positioned outside the filter tower to rotate, two support frames are symmetrically and fixedly arranged on the peripheral wall of the central rotating shaft, each support frame extends outwards from the peripheral wall of the central rotating shaft along the radial direction of the support frame, a vertical scraper is fixedly arranged at the outer end of each support plate, and the scraper is abutted against the inner wall of the filter cartridge; the bottom end of the filter cartridge is provided with a drain outlet, and the drain outlet is provided with a sealing structure capable of sealing or opening the drain outlet.

When the waste gas filtering device filters waste gas, spray liquid formed by spraying the waste gas from top to bottom by the spray purifying device is collected in the filter cylinder firstly, the spray liquid is filtered by the filter cylinder, intercepted dirt is retained in the filter cylinder, and filtered clean water enters the annular cavity to realize solid-liquid separation so as to be convenient for recycling the clean water; when the cartridge filter blocks up, start the motor, the drive the center pivot rotates, and drives two the support frame and the scraper rotates, the scraper can be right the sedimentary filth is scraped on the inner wall of cartridge filter, and finally, the filth of scraping down by the drain is discharged.

Preferably, each support frame consists of an upper support rod, a middle support rod and a lower support rod, the outer ends of the three support rods are respectively and correspondingly connected with the upper part, the middle part and the lower part of the scraper, so that the scraper is fixedly connected with the support frames, and compared with the case that a large support plate is adopted as the support frame, the central rotating shaft of the scraper is smaller in rotating resistance, and the energy consumption is reduced; simultaneously, also avoid the carriage to rotate the in-process, outwards get rid of cartridge filter inner liquid, lead to the filth in the filter screen to leak, reduce the filter effect of cartridge filter and the mud efficiency of scraping of scraper.

Preferably, a backflow pipeline and a backflow pump are further arranged outside the filtering tower, and the water outlet is communicated with the spraying and purifying device through the backflow pipeline and the backflow pump, so that the clean water in the annular cavity is recycled. Furthermore, a water replenishing pipe communicated with the annular cavity is arranged on the side wall of the filter tower.

Preferably, the annular closing plate from filter tower inner wall to the radial direction slope of the central pivot of filter tower sets up downwards, just the lower extreme of annular closing plate with the upper end of cartridge filter docks mutually, does benefit to and collects the cartridge filter with whole liquid that sprays fast in.

Preferably, the inner side of the filter tower is further provided with a particle filtering layer and a demisting layer, the particle filtering layer is located below the spraying purification device, and the demisting layer is located above the spraying purification device. The waste gas passes through the particle filtering layer from bottom to top for dust removal and the demisting layer for water mist removal.

Drawings

Fig. 1 is a schematic view of the internal structure of an exhaust gas filtering device of the present invention, in which the direction indicated by arrows is the flow direction of exhaust gas;

fig. 2 is a top view of the filter cartridge of the present invention.

Detailed Description

The following detailed description of the embodiments of the exhaust gas filtering device of the present invention will be made with reference to the accompanying drawings:

with reference to fig. 1 and fig. 2, an exhaust gas filtering apparatus includes a filtering tower 10, an air inlet 11 and an air outlet 12 are disposed on the filtering tower 10, the air outlet 12 is located above the air inlet 11, a spraying purification apparatus 30 is disposed in the filtering tower 10, the spraying purification apparatus 30 is located above the air inlet 11 and below the air outlet 12, a circular filter cartridge 70 is coaxially and fixedly disposed on an inner bottom wall of the filtering tower 10, the filter cartridge 70 is located below the air inlet 11, an upper end of the filter cartridge 70 is open, an annular cavity 80 is formed between an outer wall of the filter cartridge 70 and an inner wall of the filtering tower 10, an upper end opening of the annular cavity 80 is covered by an annular sealing plate 90, and a water outlet 13 is disposed on a bottom wall of the filtering tower 10 at a bottom end of the annular cavity 80; the coaxial central pivot 110 that is provided with in the cartridge filter 70, the lower extreme of central pivot 110 stretches out filter tower 10 and by being located a motor 120 drive rotation outside filter tower 10, the symmetry has set firmly two support frames 140 on the periphery wall of central pivot 110, every support frame 140 is all certainly the periphery wall of central pivot 110 plays along its radial outside extension setting, and every the outer end of backup pad 140 all sets firmly a scraper 170 of erectting, scraper 170 again with the inner wall of cartridge filter 70 is inconsistent, the cartridge filter 70 bottom is equipped with drain 14, drain 14 department installs and to seal or open the seal structure (conventional structure, not shown) of drain.

When the waste gas is filtered, the spray liquid formed by spraying the waste gas from top to bottom by the spray purification device 30 is firstly collected in the filter cartridge 70, the spray liquid is filtered by the filter cartridge 70, the intercepted dirt is remained in the filter cartridge 70, and meanwhile, the filtered clean water enters the annular cavity 80, so that solid-liquid separation is realized, and the clean water is convenient to reuse; when the filter cartridge 70 is blocked, the motor 120 is started to drive the central rotating shaft 110 to rotate, and drive the two support frames 140 and the scraper 170 to rotate, the scraper 170 can scrape off the dirt deposited on the inner wall of the filter cartridge 70, and finally, the scraped dirt is discharged from the sewage discharge outlet 14.

Preferably, as shown in fig. 1, each of the supporting frames 140 is composed of an upper supporting rod, a middle supporting rod and a lower supporting rod (141, 142, 143), and outer ends of the three supporting rods (141, 142, 143) are respectively and correspondingly connected with an upper portion, a middle portion and a lower portion of the scraper 170, so as to achieve a fixed connection between the scraper 170 and the supporting frame 140. Of course, the support frame of the present invention may also be, but not limited to, a support frame "consisting of an upper support rod (141), a middle support rod (142), and a lower support rod (143)", for example, a large support plate may be used as the support frame, but when a large support plate is used as the support frame, the rotation resistance of the central rotating shaft 110 is larger, and the energy consumption is increased; meanwhile, the support frame 140 will throw the liquid in the filter cartridge 70 outwards during the rotation process, which causes the dirt in the filter cartridge 70 to leak outwards, and reduces the filtering effect of the filter cartridge 70 and the mud scraping efficiency of the scraper 170.

Preferably, the water outlet 13 is communicated with the spray purification device 30 through a return pipeline 100 and a return pump 40, so that the clean water in the annular cavity 80 is recycled.

Preferably, as shown in fig. 1, a water replenishing pipe 160 communicated with the annular cavity is provided on the side wall of the filtration tower 10.

Preferably, as shown in fig. 1, the annular sealing plate 90 is disposed obliquely downward from the inner wall of the filter tower 10 to the radial direction of the central rotation axis of the filter tower 10, and the lower end of the annular sealing plate 90 is abutted to the upper end of the filter cartridge 70, so as to facilitate rapid collection of all the spray liquid into the filter cartridge 70. Of course, the annular sealing plate 90 may be, but not limited to, disposed obliquely downward from the inner wall of the filter tower 10 to the central rotation axis direction of the filter tower 10, for example, the annular sealing plate 90 may also be disposed horizontally.

Preferably, as shown in fig. 1, a particle filtering layer 20 and a defogging layer 150 are further disposed on the inner side of the filtering tower 10, the particle filtering layer 20 is located below the spray purification device 30, and the defogging layer 150 is located above the spray purification device 30. The exhaust gas passes through the particle filtration layer 20 from bottom to top for dust removal and the demister 150 for water mist removal.

In the specific implementation process, the filter cartridge 70 is formed by enclosing the circumference of a filter screen, and the aperture of the filter screen can be selected according to the size of particulate dirt in the exhaust gas discharged from different factories; the particle filter layer 20 is typically a packing layer composed of one or more of the common packing materials such as ceramic particles, zeolite, and granular activated carbon. The sealing structure can adopt a rubber plug and the like.

For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all should be considered as belonging to the protection scope of the utility model.

Claims (6)

1. The utility model provides a waste gas filtering device, includes the filter tower, be provided with air inlet and gas outlet on the filter tower, the gas outlet is located the top of air inlet, be provided with in the filter tower and spray purifier, it is located to spray purifier the top of air inlet with the below of gas outlet, its characterized in that: a circular filter cartridge is coaxially and fixedly arranged on the inner bottom wall of the filter tower, the filter cartridge is positioned below the air inlet, the upper end of the filter cartridge is arranged in an open manner, an annular cavity is formed between the outer wall of the filter cartridge and the inner wall of the filter tower, the upper end opening of the annular cavity is covered by an annular sealing plate, and a water outlet is formed in the bottom wall of the filter tower at the bottom end of the annular cavity; a central rotating shaft is coaxially arranged in the filter cartridge, the lower end of the central rotating shaft extends out of the filter tower and is driven by a motor positioned outside the filter tower to rotate, two support frames are symmetrically and fixedly arranged on the peripheral wall of the central rotating shaft, each support frame extends outwards from the peripheral wall of the central rotating shaft along the radial direction of the support frame, a vertical scraper is fixedly arranged at the outer end of each support frame, and the scraper is abutted against the inner wall of the filter cartridge; the bottom end of the filter cartridge is provided with a drain outlet, and the drain outlet is provided with a sealing structure capable of sealing or opening the drain outlet.

2. An exhaust gas filtering device according to claim 1, wherein: each support frame consists of an upper support rod, a middle support rod and a lower support rod, and the outer ends of the three support rods are correspondingly connected with the upper part, the middle part and the lower part of the scraper respectively.

3. An exhaust gas filtering device according to claim 1, wherein: the filtering tower is also provided with a backflow pipeline and a backflow pump, and the water outlet is communicated with the spraying and purifying device through the backflow pipeline and the backflow pump.

4. An exhaust gas filtering device according to claim 3, wherein: and a water replenishing pipe communicated with the annular cavity is arranged on the side wall of the filter tower.

5. An exhaust gas filtering device according to claim 1, wherein: the annular sealing plate is arranged from the inner wall of the filter tower to the radial direction of the central rotating shaft of the filter tower in an inclined and downward mode, and the lower end of the annular sealing plate is in butt joint with the upper end of the filter cartridge.

6. An exhaust gas filtering device according to claim 1, wherein: the inner side of the filter tower is also provided with a particle filtering layer and a demisting layer, the particle filtering layer is positioned below the spraying purification device, and the demisting layer is positioned above the spraying purification device.

Images