CN212017113U - Combined bag cage device - Google Patents
Combined bag cage device Download PDFInfo
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- CN212017113U CN212017113U CN202020217910.6U CN202020217910U CN212017113U CN 212017113 U CN212017113 U CN 212017113U CN 202020217910 U CN202020217910 U CN 202020217910U CN 212017113 U CN212017113 U CN 212017113U
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- 238000009423 ventilation Methods 0.000 claims description 23
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000003189 isokinetic effect Effects 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract description 53
- 239000000463 material Substances 0.000 abstract description 33
- 238000002347 injection Methods 0.000 abstract description 11
- 239000007924 injection Substances 0.000 abstract description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 5
- 239000003546 flue gas Substances 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 238000007664 blowing Methods 0.000 description 33
- 238000001914 filtration Methods 0.000 description 21
- 239000000779 smoke Substances 0.000 description 11
- 230000009471 action Effects 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 6
- 239000004744 fabric Substances 0.000 description 6
- 239000012530 fluid Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The utility model provides a combined bag cage device, which comprises a bag cage framework and a Venturi tube extending into the inner cavity of the bag cage framework; the venturi tube comprises an end face fixedly connected with the upper end of the bag cage framework, a reducing pipe section, a throat diameter and a gradually expanding pipe section; the end face, the reducing pipe section, the throat diameter and the gradually expanding pipe section are connected in sequence; the end face is provided with a plurality of vent holes with the constant-speed equivalent diameter of 3mm to 9 mm; the opening rate of the end face is between 5% and 15%. The filter bag sleeved on the combined bag cage device is used for treating flue gas, so that the problems that the effective filter area of the filter bag is obviously reduced and the running resistance of a dust collector is obviously increased due to the fact that a Venturi tube extends into an inner cavity of a bag cage framework can be solved, and the upper section of the filter bag is prevented from being damaged relatively quickly due to the fact that inclined pulse injection air flow strongly impacts filter materials close to the opening of the filter bag when pulse injection dust removal is carried out on the filter bag, and the service life of the filter bag is prolonged.
Description
Technical Field
The utility model relates to a dust remover technical field especially relates to a modular bag cage device.
Background
The bag cage device is an important part in the dust remover, namely a supporting structure arranged inside the filter bag, and can ensure that the filter bag cannot be shriveled during filtering. During filtration, the solid particles in the dust-laden gas stream deposit on the surface of the filter bag and form a dust layer which grows thicker and thicker, and naturally the filter resistance of the filter bag also increases gradually. When the filtration resistance of the filter bag increases to a certain degree, the filter bag must be cleaned. At present, the filter bag is generally cleaned by adopting a pulse blowing mode, namely, the secondary air flow which is 5-8 times of the blown compressed air is induced by the sprayed high-speed air flow through a Venturi tube to enter the filter bag, the filter bag is subjected to 'drum-collapse-drum' reciprocating deformation in a short time, so that a dust layer deposited on the filter bag is deformed and broken along with the secondary air flow, and then the dust is separated from the filter cloth in a lump shape under the action of the reverse air flow and falls under the action of gravity. In the process of pulse-jet dust cleaning of the filter bag, the dust cleaning air flow passes through the filter cloth and the dust layer when the filter bag is deformed back and forth in a 'drum-shriveling-drum' manner.
It is worth noting that when the filter bag is subjected to pulse-jet deashing, the air flow in the pulse-jet pipe flows along the pulse-jet pipe, so that the air flow in the pulse-jet pipe has a certain axial speed; and at each blowing opening, certain radial velocity is generated by corresponding static pressure difference, and a certain included angle is formed between the resultant velocity direction of the two velocities and the central line of a nozzle arranged below the blowing opening, so that each pulse blowing air flow has deflection phenomena of different degrees. Wherein the pulse blowing air stream which is ejected by the nozzle closest to the end of the pulse blowing valve is deflected most strongly, and naturally, the pulse blowing air stream impacts the bag cage head and the upper filter bag section most strongly, and the upper filter bag section is damaged most quickly.
When the filter bag is subjected to pulse injection dust removal, the venturi tube extending into the inner cavity of the bag cage framework can play a role in protecting the opening of the filter bag, but prevents the airflow sprayed into the inner cavity of the bag cage framework from moving towards the filter material near the opening of the filter bag, so that a tubular dust removal blind area with the height of 200-400 mm is formed near the opening of the filter bag. After the dust remover operates for a period of time, the filter material in the tubular dust cleaning dead zone loses the filtering function due to too much dust accumulation, so that the effective filtering area of each filter bag is obviously reduced, and the operation resistance of the dust remover is obviously increased.
SUMMERY OF THE UTILITY MODEL
The utility model provides a modular bag cage device, aim at not only solve because of venturi stretch into bag cage skeleton inner chamber, and produce the cover locate on it the filter bag effective filtration area show reduce with the obvious technical problem who increases of dust remover running resistance, but also when carrying out the pulse jetting deashing to the filter bag, prevent to make the filter bag upper segment relatively damaged fast because of the filter material that the pulse jetting air current of incline assaults the filter bag mouth intensively to prolong the life of filter bag.
The utility model adopts the following technical scheme:
a combined bag cage device comprises a bag cage framework and a Venturi tube extending into the inner cavity of the bag cage framework; the Venturi tube comprises an end face, a reducing pipe section, a throat diameter and a gradually expanding pipe section; the end face, the reducing pipe section, the throat diameter and the gradually expanding pipe section are sequentially connected, and the end face is fixedly connected with the upper end of the bag cage framework; the end face is provided with a plurality of vent holes with the constant-speed equivalent diameter of 3mm to 9 mm; the opening rate of the end face is between 5% and 15%.
Furthermore, the outer side of the end surface is fixedly connected with a cylindrical flow guide ring; the plurality of vent holes are all positioned right above the cylindrical flow guide ring; the axis of the cylindrical guide ring is superposed with the axis of the Venturi tube; the cylindrical diversion ring is provided with a plurality of rows of air ports at equal angles along the circumferential direction.
Furthermore, at least one bell mouth-shaped guide ring is sleeved on the outer side of the tube wall of the Venturi tube; the bell-mouth-shaped guide ring is in a bell-mouth shape with a small upper part and a big lower part; the axis of the bell-mouth-shaped guide ring coincides with the axis of the Venturi tube.
Further, in the plurality of rows of air ports, all the air ports in each row of air ports are arranged at equal intervals in the height direction.
Furthermore, all the air vents in the rows of air vents are oval or rectangular; the long axis direction of the oval air vent or the short side direction of the rectangular air vent is parallel to the axis of the cylindrical flow guide ring.
Furthermore, the plurality of ventilation holes are arranged on the end face in a circle or in concentric circles with more than two circles and in a circumferential equal-angle distribution manner.
Furthermore, the plurality of vent holes are circular holes, or elliptical holes, or rectangular holes, or waist-shaped holes.
Furthermore, the minor axis direction of a plurality of oval holes, or the minor face direction of a plurality of rectangular holes, or the diameter direction of the semicircle of a plurality of waist shape hole all with the radial unanimity of terminal surface.
Further, the bag cage framework comprises an upper bag cage framework, a lower bag cage framework and a connecting chuck for connecting the upper bag cage framework and the lower bag cage framework into a whole; the coupling chuck includes a male chuck and a female chuck detachably coupled together.
Further, the isokinetic equivalent diameter of the plurality of vent holes is between 3mm and 5 mm; the opening rate of the end face is between 5% and 8%.
The utility model has the advantages that: the filter bag sleeved on the combined bag cage device is used for treating flue gas, so that the problems that the effective filter area of the filter bag is obviously reduced and the running resistance of a dust collector is obviously increased due to the fact that a Venturi tube extends into an inner cavity of a bag cage framework can be solved, and the upper section of the filter bag is prevented from being damaged relatively quickly due to the fact that inclined pulse injection air flow strongly impacts filter materials close to the opening of the filter bag when pulse injection dust removal is carried out on the filter bag, and the service life of the filter bag is prolonged.
Drawings
Fig. 1 is an overall schematic view of a first embodiment of the present invention.
Fig. 2 is a partial schematic view of a first embodiment of the present invention.
Fig. 3 is a schematic top view of a first embodiment of the present invention.
Fig. 4 is an overall schematic view of a second embodiment of the present invention.
Fig. 5 is a schematic top view of a second embodiment of the present invention.
Fig. 6 is a schematic top view of a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and technical effects of the present invention clearer and clearer, the present invention will be further described with reference to the accompanying drawings and specific embodiments.
Example one
A combined bag cage device as shown in fig. 1-3, comprising a bag cage framework 1, a cylindrical guide ring 3, a bell mouth-shaped guide ring 4 and a venturi tube 2 extending into the inner cavity of the bag cage framework 1; the bag cage framework 1 comprises a bag cage head cover 11, a bag cage bottom cover 15, an upper bag cage framework 12, a lower bag cage framework 14 and a connecting chuck 13 for connecting the upper bag cage framework 12 and the lower bag cage framework 14; the coupling chuck 13 includes a male chuck and a female chuck (neither shown) detachably coupled together, wherein the male chuck has a spring plate (not shown) which is extendable and retractable in a radial direction of the male chuck. The male chuck and the female chuck are prior art to those skilled in the art, and the detailed connection manner is not described herein.
The Venturi tube 2 comprises a bag cage framework1, an end face 21, a tapered pipe section 22, a throat diameter 23 and a gradually expanding pipe section 24 which are fixedly connected with the upper end of the pipe body; the end face 21, the tapered pipe section 22, the throat diameter 23 and the gradually expanding pipe section 24 are connected in sequence; the end surface 21 is provided with a circle of 24 ventilation holes 211 which are distributed at equal angles along the circumferential direction; the vent holes 211 are circular holes, the number of the vent holes is 24, the diameter of each vent hole 211 is 9mm, and the constant equivalent diameter De of each vent hole is also equal to 9 mm; the area of the end face 21 is 16856mm2The area of the 24 ventilation holes 211 is equal to 1526mm in total2The aperture ratio of the end face 21 is equal to 9%.
The term "isokinetic equivalent diameter" is equal to 4 times the hydraulic radius. And the hydraulic radius is equal to the ratio of the flow area and the wet circumference of the conveying fluid section, wherein the wet circumference refers to the contact length of the fluid and the solid wall surface on the conveying fluid section. When the vent holes provided on the end surface of the venturi tube are circular holes or non-circular holes, the constant equivalent diameter De thereof can be converted from the size thereof.
The cylindrical guide ring 3 is fixedly connected with the outer side of the end face 21; the 24 ventilation holes 211 are all located right above the cylindrical flow guide ring 3; 12 rows of air ports 31 are arranged on the cylindrical diversion ring 3 along the circumferential direction at equal angles; the axis of the cylindrical guide ring 3 is superposed with the axis of the Venturi tube 2; all the air ports 31 in each row of air ports are rectangular and are arranged at equal intervals in the height direction; in addition, the short side direction of each vent hole 31 is parallel to the axis of the cylindrical deflector ring 3. Of course, each of the air vents 31 may be changed into an oval air vent, and the major axis direction of the oval air vent is parallel to the axis of the tubular deflector ring 3.
The bell-mouth-shaped guide ring 4 is sleeved on the divergent pipe section 24 of the Venturi tube 2; the bell-mouth-shaped guide ring 4 is in a bell-mouth shape with a small upper part and a big lower part; the axis of the bell-mouth-shaped guide ring 4 is coincided with the axis of the Venturi tube 2.
When the filter bag sleeved on the combined bag cage device is subjected to pulse blowing ash removal, one pulse blowing air flow is sprayed out by a nozzle closer to one end of the pulse blowing valve, the moving direction of the pulse blowing air flow is more inclined, and the more air flow passes through one, two or more vent holes 211 on the end surface 21 of the Venturi tube 2 positioned right below the pulse blowing air flow and is flushed into a space right below the end surface 21 of the Venturi tube 2; however, since the equivalent diameter De of the individual ventilation holes 211 in the end face 21 is only 9mm and the opening ratio of the end face is only 9%, a part of the air stream of each relatively deflected pulse blowing air stream penetrates one, two or several ventilation holes 211 to form one, two or several small and skewed air streams and is rapidly decelerated by diffusion so that they do not strongly impact the filter material close to the mouth of the filter bag and do not damage the upper part of the filter bag relatively quickly. In fact, then, under the guidance of the cylindrical guide ring 3, part of the air flow sequentially passes through the air vents 31 on the cylindrical guide ring 3, and the filter material and the dust cake closer to the filter bag opening are subjected to reciprocating deformation from drum to flat to drum within a short time, so that the dust cake closer to the filter bag opening is separated from the filter cloth in a lump under the action of the reverse air flow; the rest of the air flow rushes into the space below the cylindrical guide ring 3, then under the guide action of the bell-mouth-shaped guide ring 4, a small part of the air flow sequentially passes through the rest of the filter materials and the dust cakes close to the filter bag opening, and simultaneously, the rest of the filter materials close to the filter bag opening are subjected to reciprocating deformation of 'drum-shriveling-drum' in a short time, so that the rest of the dust cakes close to the filter bag opening are separated from the filter cloth in a lump shape under the action of reverse air flow, and most of the air flow rushes into the space below the venturi tube 2 and is mixed with the air flow rushed out of the venturi tube 2, and the other parts of the filter bag are cleaned.
In addition, when the filter bag sleeved on the combined bag cage device is subjected to pulse blowing dust removal, namely, the secondary air flow which is 5-8 times of the blowing compressed air is introduced into the combined bag cage device by the sprayed high-speed air flow through the Venturi tube 2, and the filter bag is caused to perform 'drum-flat-drum' reciprocating deformation in a short time, so that a dust layer accumulated on the filter bag is deformed and broken along with the secondary air flow, and then when the dust is separated from the filter cloth in a lump shape under the action of counter air flow and falls under the action of gravity, a low-pressure area is formed on the outer ring of the outlet of the Venturi tube 2. This low pressure zone is capable of drawing some air through the remaining vents 211 (note: those vents 211 not swept by the relatively skewed pulse blowing air) on the end face 21 of the venturi tube 2, and rapidly passing through the tubular deflector ring 3, then under the guiding action of the bell-mouth-shaped deflector ring 4, a small portion of the air flow cleans the filter material near the mouth of the filter bag, while the majority of the air flow is flushed into the space below the venturi tube 2 and mixed with the air flow flushed from the venturi tube 2 while cleaning the other portions of the filter bag.
In summary, when the filter bag sleeved on the combined bag cage device is subjected to pulse blowing dust removal, a part of air flow in each deflected pulse blowing air flow and some air sucked by the low-pressure area can flow into a space right below the end surface 21 of the venturi tube 2 through one, two or more vent holes 211 on the end surface 21 of the venturi tube 2, and filter materials close to the opening of the filter bag are subjected to dust removal. Moreover, like other parts of the filter bag, the filter material close to the filter bag opening can still filter the dust-containing airflow after the filter material is subjected to ash removal. Therefore, during the operation of the dust remover, the effective filtering area of each filter bag can be kept unchanged, so that the technical problem that the operation resistance of the dust remover is obviously increased due to the obvious reduction of the effective filtering area of the filter bag can be solved.
In addition, when the filter bag sleeved on the combined bag cage device filters dust-containing smoke, the smoke filtered by the filter material close to the opening of the filter bag enters the space right below the end surface 21 and enters the air purifying chamber above the filter bag through the vent hole 211 on the end surface 21; in addition, among the smoke filtered by other parts of the filter bag, a part of the smoke can also enter the space right below the end surface 21 and enter the air purifying chamber through the vent holes 211 on the end surface 21, so that the running resistance of the dust remover is reduced.
In a word, the filter bag sleeved on the combined bag cage device is adopted to treat the flue gas, so that the technical problems that the effective filtering area of the filter bag is obviously reduced and the running resistance of a dust collector is obviously increased due to the fact that the Venturi tube 2 extends into the inner cavity of the bag cage framework 1 can be solved, and the upper section of the filter bag is prevented from being damaged relatively quickly due to the fact that inclined pulse injection air flow strongly impacts the filter material close to the opening of the filter bag when pulse injection ash removal is carried out on the filter bag, and the service life of the filter bag is prolonged.
Of course, all of the 24 vent holes 211 provided on the end face 21 of the venturi tube 2 may be changed to rectangular holes. When the length and width of each of the ventilation holes 211 are 7mm and 5mm, respectively, and the width direction thereof is aligned with the radial direction of the end surface of the venturi tube 1, the constant equivalent diameter De thereof is equal to 6mm, and the aperture ratio of the end surface of the venturi tube 1 is equal to 5%. In addition, sometimes the bell-mouth-shaped guide ring 4 can be detached according to actual needs so as to prevent the filter material close to the filter bag opening from being impacted too strongly when the filter bag is subjected to pulse blowing dust removal.
Example two
As shown in fig. 4 and 5, the combined bag cage device provided by the present invention comprises a bag cage framework 1 and a venturi tube 2 extending into an inner cavity of the bag cage framework 1; the bag cage framework 1 comprises a bag cage head cover 11, a bag cage bottom cover 15, an upper bag cage framework 12, a lower bag cage framework 14 and a connecting chuck 13 for connecting the upper bag cage framework 12 and the lower bag cage framework 14; the coupling chuck 13 includes a male chuck and a female chuck (neither shown) detachably coupled together, wherein the male chuck has a spring plate (not shown) which is extendable and retractable in a radial direction of the male chuck. The venturi tube 2 also includes an end face 21, a tapered tube section 22, a throat diameter 23, and a diverging tube section 24 fixedly connected to the upper end of the bag cage frame 1, and the end face 21, the tapered tube section 22, the throat diameter 23, and the diverging tube section 24 are connected in sequence, please refer to fig. 2.
The end face 21 is provided with two circles of 48 ventilation holes 211 which are concentric and uniformly distributed along the circumferential direction; the 48 ventilation holes 211 are arranged on the end surface 21 in two concentric circles and are distributed at equal angles along the circumferential direction (note that 24 ventilation holes 211 are distributed at equal angles along the circumferential direction on the inner circle and the outer circle); the 48 ventilation holes 211 are all ovalHoles, and the minor axis directions of the holes are all consistent with the radial direction of the end face 21; the length of the major axis and the length of the minor axis of the 48 vent holes 211 are both 7mm and 4mm, respectively, and the equivalent diameter De thereof is equal to 5 mm. The area of the end face is 16856mm2The total area of the 48 vent holes 211 is equal to 1055mm2And the aperture ratio of the end face is equal to 6%.
The outer side of the pipe wall of the divergent pipe section 24 is sleeved with a bell-mouth-shaped guide ring 4; the bell-mouth-shaped guide ring 4 is in a bell-mouth shape with a small upper part and a big lower part; the axis of the bell-mouth-shaped guide ring 4 is coincided with the axis of the Venturi tube 2.
When the filter bag sleeved on the combined bag cage device is subjected to pulse blowing ash removal, one pulse blowing air flow is sprayed out by a nozzle closer to one end of the pulse blowing valve, the moving direction of the pulse blowing air flow is more inclined, and the more air flow passes through one, two or more vent holes 211 on the end surface 21 of the Venturi tube 2 positioned right below the pulse blowing air flow and is flushed into a space right below the end surface 21 of the Venturi tube 2; however, since the equivalent diameter De of the individual ventilation holes 211 in the end face 21 is only 5mm and the opening ratio of the end face is only 6%, a part of the air stream of each relatively deflected pulse blowing air stream penetrates one, two or several ventilation holes 211 to form one, two or several small and skewed air streams and is rapidly decelerated by diffusion so that they do not strongly impact the filter material close to the mouth of the filter bag and do not damage the upper part of the filter bag relatively quickly. In fact, then, under the guiding action of the bell-mouth-shaped guide ring 4, a small part of the air flow sequentially passes through the filter material and the dust cake near the filter bag opening, the dust cake near the filter bag opening is separated from the filter cloth in a lump shape, and the majority of the air flow rushes into the space below the venturi tube 2 and is mixed with the air flow rushed out from the venturi tube 2 while the other parts of the filter bag are cleaned.
In order to further improve the strength of the impact of the small and oblique air flow on the filter material close to the filter bag opening, a flared guide ring in the shape of a flared opening with a small upper part and a large lower part can be sleeved on the tapered pipe section 22 of the venturi tube 2. The shape of the bell-mouth-shaped guide ring is basically the same as that of the bell-mouth-shaped guide ring 4, and the axis of the bell-mouth-shaped guide ring is also coincident with that of the Venturi tube 2. However, sometimes, according to actual needs, the bell-mouth-shaped flow guide ring 4 and the bell-mouth-shaped flow guide ring sleeved on the tapered pipe section 22 may be removed, or one or two bell-mouth-shaped flow guide rings having the same shape as the bell-mouth-shaped flow guide ring 4 may be added, so that the filter material near the filter bag opening is also properly impacted when the filter bag is subjected to pulse blowing dust cleaning.
In addition, when the filter bag sleeved on the combined bag cage device is subjected to pulse blowing dust removal, a low-pressure area is formed on the outer ring of the outlet of the Venturi tube 2. This low pressure zone is capable of drawing some air through the remaining vents 211 (note: those vents 211 not swept by the relatively skewed pulse blowing air) on the end face 21 of the venturi tube 2, and then under the guiding action of the two bell-mouth-shaped guiding rings, a small portion of the air blows the ash on the filter material near the mouth of the filter bag, while the majority of the air blows into the space below the venturi tube 2 and mixes with the air blown from the venturi tube 2 while cleaning the ash on the upper section of the filter bag.
In summary, when the filter bag sleeved on the combined bag cage device is subjected to pulse blowing dust removal, a part of air flow in each deflected pulse blowing air flow and some air sucked by the low-pressure area can flow into a space right below the end surface 21 of the venturi tube 2 through one, two or more vent holes 211 on the end surface 21 of the venturi tube 2, and filter materials close to the opening of the filter bag are subjected to dust removal. Moreover, like other parts of the filter bag, the filter material close to the filter bag opening can still filter the dust-containing airflow after the filter material is subjected to ash removal. Therefore, during the operation of the dust remover, the effective filtering area of each filter bag can be kept unchanged, so that the technical problem that the operation resistance of the dust remover is obviously increased due to the obvious reduction of the effective filtering area of the filter bag can be solved.
In addition, when the filter bag sleeved on the combined bag cage device filters dust-containing smoke, the smoke filtered by the filter material close to the opening of the filter bag and some smoke filtered by other parts of the filter bag can enter the air purifying chamber above the filter bag through the vent holes 211 on the end surface 21, so that the running resistance of the dust remover is reduced.
In a word, the filter bag sleeved on the combined bag cage device is adopted to treat the flue gas, so that the technical problems that the effective filtering area of the filter bag is obviously reduced and the running resistance of a dust collector is obviously increased due to the fact that the Venturi tube 2 extends into the inner cavity of the bag cage framework 1 can be solved, and the upper section of the filter bag is prevented from being damaged relatively quickly due to the fact that inclined pulse injection air flow strongly impacts the filter material close to the opening of the filter bag when pulse injection ash removal is carried out on the filter bag, and the service life of the filter bag is prolonged.
As will be described later, the 48 vent holes 211 on the end surface 21 of the venturi tube 2 may be circular holes or rectangular holes. When the 48 ventilation holes 211 are all circular holes, the radii thereof are all 3mm, the equivalent diameter De is all equal to 6mm, and the aperture ratio of the end surface 21 of the venturi tube 2 is equal to 8%; when the 48 ventilation holes 211 are all rectangular holes and the short side direction of the ventilation holes is consistent with the radial direction of the end surface 21 of the venturi tube 2, the length and the width of the 48 ventilation holes 211 are respectively 7mm and 3mm, the equivalent diameter De of the ventilation holes is equal to 4mm, and the aperture ratio of the end surface of the venturi tube 2 is equal to 6%.
EXAMPLE III
The other combined bag cage device provided by the utility model also comprises a bag cage framework 1 and a Venturi tube 2 extending into the inner cavity of the bag cage framework 1; the bag cage framework 1 also comprises a bag cage head cover 11, a bag cage bottom cover 15, an upper bag cage framework 12, a lower bag cage framework 14 and a connecting chuck 13 for connecting the upper bag cage framework 12 and the lower bag cage framework 14; the coupling chuck 13 includes a male chuck and a female chuck (both not shown) detachably coupled together, wherein the male chuck has a spring plate (not shown) that can be extended and contracted in a radial direction of the male chuck, see fig. 4. The venturi tube 2 also includes an end face 21, a tapered tube section 22, a throat diameter 23, and a diverging tube section 24 fixedly connected to the upper end of the bag cage framework 1, and the end face 21, the tapered tube section 22, the throat diameter 23, and the diverging tube section 24 are connected in sequence, please refer to fig. 2.
As shown in fig. 6, the end surface 21 is provided with two circles of concentric 24 ventilation holes 211 distributed at equal angles along the circumferential direction, that is, the end surface 21 is provided with one circle of 12 ventilation holes 211 distributed at equal angles along the circumferential direction and 12 ventilation holes 211 distributed at equal angles along the circumferential direction with another circle concentric with the circle; the 24 ventilation holes 211 are all waist-shaped holes, and the diameter directions of the semi-circular arcs are all consistent with the radial direction of the end face 21.
The diameter of the semicircular arc of the vent hole 211 is 5mm, the distance between the diameter of one semicircular arc of the vent hole 211 and the diameter of the other semicircular arc thereof is 12mm, and the equivalent diameter De of the vent hole is equal to 8 mm; the area of the end face 21 is 16856mm2The aperture ratio of the end face 21 of the venturi tube 2 is equal to 11%.
Like the second embodiment, when the filter bag sleeved on the combined bag cage device is subjected to pulse blowing ash removal, a part of air flow in each deflected pulse blowing air flow and some air sucked by the low-pressure area can flow into the space right below the end surface 21 of the venturi tube 2 through one, two or more vent holes 211 on the end surface 21, and the ash removal is performed on the filter material close to the opening of the filter bag. Moreover, like other parts of the filter bag, the filter material close to the filter bag opening can still filter the dust-containing airflow after the filter material is subjected to ash removal. Therefore, during the operation of the dust remover, the effective filtering area of each filter bag can be kept unchanged, so that the problem that the operation resistance of the dust remover is obviously increased due to the obvious reduction of the effective filtering area of the filter bag can be solved.
In addition, when the filter bag sleeved on the combined bag cage device filters dust-containing smoke, the smoke filtered by the filter material close to the opening of the filter bag and some smoke filtered by other parts of the filter bag can enter the air purifying chamber above the filter bag through the vent holes 211 on the end surface 21, so that the running resistance of the dust remover is reduced.
In a word, the filter bag sleeved on the combined bag cage device is adopted to treat the flue gas, so that the technical problems that the effective filtering area of the filter bag is obviously reduced and the running resistance of a dust collector is obviously increased due to the fact that the Venturi tube 2 extends into the inner cavity of the bag cage framework 1 can be solved, and the upper section of the filter bag is prevented from being damaged relatively quickly due to the fact that inclined pulse injection air flow strongly impacts the filter material close to the opening of the filter bag when pulse injection ash removal is carried out on the filter bag, and the service life of the filter bag is prolonged.
The difference between the second embodiment and the third embodiment is that: when the length, the filtering area and the filtering air speed of the filter bag sleeved on the combined bag cage device of the second embodiment are respectively equal to the length, the filtering area and the filtering air speed of the filter bag sleeved on the combined bag cage device of the third embodiment, and the material and the cross-sectional shape of the filter bag are the same, the filtering resistance of the filter bag sleeved on the combined bag cage device of the second embodiment is slightly larger than the filtering resistance of the filter bag sleeved on the combined bag cage device of the third embodiment; however, the filter bag sleeved on the combined bag cage device of the second embodiment is used for treating smoke, so that the situation that the upper section of the filter bag is damaged relatively quickly due to the fact that the inclined pulse blowing airflow strongly impacts the filter material close to the opening of the filter bag can be effectively prevented.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments still belong to the protection scope of the patent rights of the present invention.
Claims (10)
1. A combined bag cage device comprises a bag cage framework and a Venturi tube extending into the inner cavity of the bag cage framework; the Venturi tube comprises an end face, a reducing pipe section, a throat diameter and a gradually expanding pipe section; the end face, the reducing pipe section, the throat diameter and the gradually expanding pipe section are connected in sequence, and the end face is fixedly connected with the upper end of the bag cage framework, and is characterized in that:
the end face is provided with a plurality of vent holes with the constant-speed equivalent diameter of 3mm to 9 mm;
the opening rate of the end face is between 5% and 15%.
2. A modular bag cage assembly as claimed in claim 1, wherein:
the outer side of the end face is fixedly connected with a cylindrical flow guide ring;
the plurality of vent holes are all positioned right above the cylindrical flow guide ring;
the axis of the cylindrical guide ring is superposed with the axis of the Venturi tube;
the cylindrical diversion ring is provided with a plurality of rows of air ports at equal angles along the circumferential direction.
3. A modular bag cage assembly according to claim 1 or 2, wherein:
the outer side of the tube wall of the Venturi tube is at least sleeved with a horn-mouth-shaped guide ring;
the bell-mouth-shaped guide ring is in a bell-mouth shape with a small upper part and a big lower part;
the axis of the bell-mouth-shaped guide ring coincides with the axis of the Venturi tube.
4. A modular bag cage assembly as claimed in claim 2, wherein:
in the rows of the air ports, all the air ports in each row of the air ports are arranged at equal intervals in the height direction.
5. A modular bag cage assembly according to claim 2 or 4, wherein:
all the air vents in the rows of air vents are oval or rectangular; the long axis direction of the oval air vent or the short side direction of the rectangular air vent is parallel to the axis of the cylindrical flow guide ring.
6. A modular bag cage assembly as claimed in claim 1, wherein:
the plurality of ventilation holes are in be the equal angular distribution of circle edge circumference or be the concentric circles more than two circles and along the equal angular distribution of circumference on the terminal surface.
7. A modular bag cage assembly according to claim 1 or 6, wherein:
the plurality of vent holes are circular holes, or elliptical holes, or rectangular holes, or waist-shaped holes.
8. A modular bag cage assembly as claimed in claim 7, further comprising:
the minor axis direction in a plurality of oval hole, perhaps the minor face direction in a plurality of rectangular hole, perhaps the diameter direction of the semicircle in a plurality of waist shape hole all with the radial unanimity of terminal surface.
9. A modular bag cage assembly as claimed in claim 1, wherein:
the bag cage framework comprises an upper bag cage framework, a lower bag cage framework and a connecting chuck for integrally connecting the upper bag cage framework and the lower bag cage framework;
the coupling chuck includes a male chuck and a female chuck detachably coupled together.
10. A modular bag cage assembly according to claim 1 or 2, wherein:
the isokinetic equivalent diameters of the plurality of vent holes are all between 3mm and 5 mm;
the opening rate of the end face is between 5% and 8%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020217910.6U CN212017113U (en) | 2020-02-27 | 2020-02-27 | Combined bag cage device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020217910.6U CN212017113U (en) | 2020-02-27 | 2020-02-27 | Combined bag cage device |
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| Publication Number | Publication Date |
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| CN212017113U true CN212017113U (en) | 2020-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020217910.6U Active CN212017113U (en) | 2020-02-27 | 2020-02-27 | Combined bag cage device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111185055A (en) * | 2020-02-27 | 2020-05-22 | 福建欣隆环保股份有限公司 | Combined bag cage device |
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2020
- 2020-02-27 CN CN202020217910.6U patent/CN212017113U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111185055A (en) * | 2020-02-27 | 2020-05-22 | 福建欣隆环保股份有限公司 | Combined bag cage device |
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