KR101998386B1 - Complex dust collector combined with tetragonal bag filter dust collector and Gravitational rotation dust collector - Google Patents

Abstract

The present invention relates to a complex bag filter dust collector combined with a rectangular bag filter dust collector and a rotary gravity dust collector. The complex bag filter dust collector combined with a rectangular bag filter dust collector and a rotary gravity dust collector comprises: a rotary gravity dust collector for treating coarse dust by gravity by the rotational force generated by the dust-containing gas flowing from a gas inlet; a distribution plate positioned at an upper portion of the rotary gravity dust collector and having perforated holes having different sizes according to a position of passing the gas-containing gas primarily-filtered from the rotary gravity dust collector to an upper rectangular bag filter dust collector, and equalizing the amount of dust-containing air sucked into the rectangular bag filter dust collector; a rectangular bag filter dust collector for collecting dust by the suction force by a gas suction pump in an upper portion of a filter cloth.

Description

Technical Field [0001] The present invention relates to a composite dust collector having a tetragonal bag filter dust collector and a gravitational rotation dust collector,

The present invention relates to a composite filter dust collector, and more particularly, to a combined filter dust collector, which comprises a rectangular filtration dust collector having a cylindrical suction filter for sucking dust with a rotary gravity dust collector using a cyclone principle, The present invention relates to a combined filtration dust collector combined with a rectangular filtration dust collector and a rotating gravity dust collector for collecting dust by suction.

Among the dust collectors, the filter and the dust collector using the filtration have some disadvantages against the high dust collecting efficiency.

First, in the conventional filter cloth dust collecting apparatus, as the filtration operation progresses, the dust layer collected in the filter cloth becomes thick, so that the pressure loss becomes high and normal operation becomes impossible. Therefore, the dust collected on the surface of the filter cloth must be shaken off by periodic air pulse pulsing & cleaning operation.

Further, when the dust load amount sucked into the filter cloth dust collecting apparatus is high, the pressure loss increases sharply.

The upper part is a rectangular filter dust collector consisting of a bunch of filter cloths, the lower part is a reverse phase of quadrangular pyramid, and the structure is constructed to absorb dust gas. The conventional dust collector is a dust collector installed in the lower part. The dust that has been trapped on the inner wall of the lower dust collector is trapped and the dust gas is not filtered out to a large extent and the dust is trapped in the filter bag of the rectangular filter dust collector installed on the upper part of the combined filter dust collector There is a problem that an air pulse exhaustion operation must be frequently performed on the dust adhering to the filter cloth of the rectangular filter dust collector.

Particularly, in the case of particles having a high dust content of the dust gas introduced into the dust collector, or particles having strong bonding strength such as rice straw, grain, sawdust, etc., the bridge phenomenon may be caused in the hopper of the dust collector, thereby clogging the dust collector. Further, when there is a problem in the air pulse exhaustion, there are many phenomena that the dust filter bag is filled with dust and is not discharged.

Korean Patent No. 10-0242228 discloses a high efficiency integrated centrifugal filtration and dust collecting apparatus in which centrifugal force and the principle of filter cloth are combined into one device in order to solve the above problems. The disclosed high-efficiency integrated centrifugal filtration and dust collecting apparatus collects dust particles primarily introduced by a centrifugal force principle in order to collect dust discharged from a dust generating process such as a heavy oil combustion process, a waste incinerator process, a cement manufacturing industry, and a steelmaking process , The dust particles not collected in the above process are collected by the upper filter cloth, and the two dust collecting principles are combined into a single device.

However, in the above-mentioned high efficiency integrated centrifugal filtration and dust collecting apparatus, when the air filtered by large dust particles by the centrifugal force from the bottom rises to the filter cloth at the upper side, the fine dust among the fine dust falling into the dust reservoir at the lowermost portion, The dust is concentrated only on the filter cloth located at the center in the bundle of filter cloths, so that the dust is not uniformly collected on all the filter filters, which lowers the efficiency of the filter discharge operation and lowers the filtration efficiency by the filter cloth, .

Korean Patent Registration No. 10-0242228 (High Efficiency Integrated Centrifugal Filter and Dust Collector)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to minimize the amount of dust adhering to the surface of a bag filter, thereby extending the life span of the filter fabric, It is possible to improve the dust collecting efficiency by keeping the pressure loss of the dust collector as low as possible by exhausting high efficiency with low pressure compressed air. By combining rectangular filtering dust collector and rotating dust collecting dust reducing installation space compared to the conventional dust collecting device, An object of the present invention is to provide an integrated composite filter dust collector.

In addition, by using the principle of cyclone in the rotating gravitational dust collector in the lower part, large dust particles are collected to reduce suction dust load of the upper quadrangular filtering dust collector, and a part extending from a circular shape to a square shape between the rotating gravity dust collector and the rectangular filtering dust collector And a curved wing frame or an inclined wing frame is installed in the rectangular filtering dust collector so as to make the dust absorbed by the filtering cloth of the rectangular filtering dust collector uniform over the entire area.

According to an embodiment of the present invention, a combined filtration dust collector in which a rectangular filtration dust collector and a rotating gravity dust collector are combined is capable of absorbing coarse dust by gravitational force generated by the gas introduced from a gas inlet, A rotating gravity dust collector; A pore hole having a different size is formed depending on a position of the rotating gravity dust collector and a position where the dust gas filtered by the rotating gravity dust collector is passed through the upper rectangular filtering dust collector, And a quadrangular filter and dust collector for collecting dust by a suction force by a gas suction pump at an upper part of the distribution plate and the filter cloth.

The diaphragm hole in the diagonal portion of the distribution plate is enlarged and the remaining portion thereof is made smaller in the perforation hole.

In addition, a curved wing frame is provided between the rotary gravity dust collector and the rectangular filtering dust collector, and a curved wing frame convexly curved upward to form a curved wing in the middle of the four corners to keep the flow rate of the fluid sucked into the filter cloth constant.

Further, the present invention is characterized in that an inclined wing frame is provided between the rotary gravity dust collector and the rectangular filtering dust collector, and an inclined wing frame is provided at the middle of the four corners so as to make the distribution of the flow rate of the fluid sucked into the filter cloth constant.

The apparatus further includes a compressed air injection pipe for removing dust by periodically performing air pulse exhaustion by injecting compressed air outwardly from the inside of the filter cloth.

The rotary gravity dust collector 400 further includes a rotary valve installed below the rotary gravity dust collector 400 to discharge collected dust.

According to an embodiment of the present invention, dust particles having high bonding strength such as rice straw, rice bran, and sawdust of wood are contained in the dust gas, so that even when the dust load is high, the rotating gravity dust collector, It is possible to filter one dust first and achieve a higher filtration efficiency even in the same filtration area as the conventional rectangular dust collector.

In addition, the distribution plate, the curved blade frame or the inclined wing frame provided between the lower rotating gravity dust collector and the upper rectangular filtering dust collector can uniformly suck dust into the filtering cloth of the rectangular filtering dust collector in all areas, So that dust particles are trapped, thereby extending the air pulse exhausting period and extending the life of the filter fabric.

The combination of the rotating gravity dust collection method using the cyclone and the filtration and dust collection method using the filter cloth enables the efficiency to be increased with a small installation space.

Particularly, a distribution plate or a curved blade frame installed on a portion extending from a circular shape to a rectangular shape when the dust gas moves from the lower part to the upper part. The inclined wing frame has a space occupied when the conventional filter dust collector having a circular cross- When the upper part is converted into a rectangular filtering dust collector in order to reduce dust collection efficiency and improve the dust collecting efficiency, the remodeling process can be simplified.

On the other hand, the lower rotating gravity dust collector collects dust at the center of the dust collector in all cases, such as light dust, dust having a high viscosity, and moisture having a high moisture content, Effect.

FIG. 1 is a perspective view showing a combined filtration dust collector having a rectangular filtration dust collector and a rotating gravity dust collector according to the present invention.
2 is a cross-sectional view showing a cross section of the distribution plate.
3 is a sectional view showing a cross section of a curved blade frame.
4 is a cross-sectional view showing a cross section of an inclined wing frame.
5 is a cross-sectional view showing a side surface of the composite filter dust collector of the present invention.
6 is a view showing three cross-sections for measuring the flow velocity distribution.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

The drawings are schematic and not drawn to scale. The relative dimensions and ratios of the parts in the figures are exaggerated or reduced in size for clarity and convenience in the figures, and any dimensions are merely illustrative and not restrictive. And to the same structure, element or component appearing in more than one drawing, the same reference numerals are used to denote similar features.

The embodiments of the present invention specifically illustrate ideal embodiments of the present invention. As a result, various variations of the illustration are expected. Thus, the embodiment is not limited to any particular form of the depicted area. For example, the material used in the composite filtration dust collector of one embodiment may be replaced with another material having equivalent properties.

1, 2, 3, 4, 5, and 6, a combined filtration dust collector 101 in which a rectangular filtration dust collector and a rotating gravity dust collector are combined according to an embodiment of the present invention will be described.

The gas inlet 410 formed in the upper part of the rotating gravity dust collector 400 installed in the lower part of the combined filtration dust collector according to the preferred embodiment of the present invention is for introducing the dust gas generated from the facilities of the factory, 410 are installed at a position eccentrically outward from the center of the rotating gravity dust collector 400, when the dust gas is introduced into the gas inlet 410, the dust particles are introduced into the rotating gravity dust collector 400 by the cyclone principle And dust particles that are coarse at the center of the rotating gravity dust collector 400 are gathered and gathered downward by gravity.

In addition, the dust flows down along the inner wall of the rotating gravity dust collector 400, which gradually slopes downward toward the center, and is collected downward by gravity.

The dust collected at the bottom of the rotating gravity dust collector 400 is discharged through the rotary valve 420 at regular intervals.

In one preferred embodiment of the present invention, the combined filter precipitator 101 having a rectangular filtering dust collector and a rotating gravity dust collector has a height of 7.7 m, and the rectangular filtering dust collector 200 has a square cross section having a width of 2.3 m and a length of 3 m And the rotating gravity dust collector 400 can have a height of 2.3 m.

The damping gas that is roughly filtered by the rotating gravity dust collector 400 flows while rotating inside the rotating gravity dust collector 400 while the bleaching filter 230 generated by the gas suction pump 530 is rotated, The dust gas is sucked into the rectangular filtering dust collector 200 through the puncture hole 310 of the distribution plate 300 or through the curved blade frame 600 or the gull wing frame 700 by the suction pressure in the direction of the suction force.

2, the spacing of the perforation holes 310 of the distribution plate 300 is constant but varies in size. This is because the exhaust gas sucked into the filter bag 230 of the rectangular filter 200 is discharged to all the filter bags 230 To have the same flow rate.

3 and 4, the wing frame having the curved blade 610 and the inclined wing 710 is also pressed against all of the filter cloth 230 by the suction gas sucked into the filter cloth 230 of the rectangular filter dust collector 200 So as to have the same flow rate.

The turbulent gas introduced by the gas inlet 410 formed at the eccentrically located position on the rotating gravity dust collector 400 has a rotating force and the turbulent gas in the moving state with the rotational force is supplied to the filter cloth The dust trapped in the filtering cloth 230 of the rectangular filtering dust collector 200 can be prevented from being sucked into the filtering cloth 230 (230) because the dust gas is not sucked in all the areas of the rectangular filtering dust collector 200 at the same flow rate. Can not be collectively collected with respect to all the filter cloths 230 of the bundle.

The distribution plate 300 or the curved blade frame 600 is disposed between the rotary gravity dust collector 400 and the rectangular filter 200 in order to uniformly collect dust on all the filter cloths 230 of the rectangular filter dust collector 200. [ Or the inclined wing frame 700 is inserted.

As a result of the experiment to observe the distribution of the flow rate of the turbulent gas passing through the distribution plate 300 in the course of the movement of the turbulent gas to the distribution plate 300,

A three-dimensional shape is designed based on the drawing, and an RNG k-epsilon model is calculated from CFD (Computational Fluid Dynamics) by performing a computational analysis in a combined filter precipitator 101 in which a rectangular filtering dust collector and a rotating gravity dust collector are combined. To predict the velocity field. In order to determine the uniformity of the velocity, the root mean square (RMS) value obtained by the following equation was used.

는 해당 영역의 평균 속도,

는 해당 지점의 속도이다. RMS(%)는 전체 영역 중 특정 영역으로 유동이 집중되는 경우, 100%에 가까운 값을 나타내며, 전체 영역에 균일한 유동 분포를 가질 경우 0%에 가까운 값을 나타낸다. 도 6을 참조하여 CFD 해석 결과를 보면 상기 사각형여과집진기와 회전중력집진기가 결합된 복합여과집진기(101)에서 RMS값을 측정할 단면을 총 세 부분으로 설정하고 RMS값을 측정하면 Plane1에서는 34.82%, Plane2에서는 54.32%, Plane3에서는 83.92%가 측정되었다. Where A is the area of the cross section,

Is the average speed of the area,

Is the velocity of the point. RMS (%) shows a value close to 100% when the flow is concentrated in a specific region of the whole region, and a value close to 0% when the region has a uniform flow distribution. Referring to FIG. 6, in the CFD analysis results, the cross-sectional area for measuring the RMS value in the combined filter precipitator 101 combined with the rectangular filtration dust collector and the rotating gravity dust collector was set to three parts, and the RMS value was measured to be 34.82% , 54.32% in Plane2, and 83.92% in Plane3.

Accordingly, it can be seen that the RMS value is gradually lowered when the dust gas is moved from the rotating gravity dust collector 400 to the rectangular filtering dust collector 200 by installing the distribution plate 300. As a result, it can be seen that the velocity according to the height becomes gradually uniform as the gas is elevated.

The perforation hole 310 in the diagonal portion of the square distribution plate 300 is large in size and the perforation hole 310 in the four corner portions except the perforation hole 310 is small in size. A relatively large amount can be sucked in the center portion with a low flow rate and a relatively small amount can be sucked in the outermost portion where the flow rate of the turbulent gas is high.

When the distribution plate 300 having the same size but the same size of the perforation hole 310 is subjected to the above-described process, the exhaust gas sucked into the filter cloth 230 of the quadrangular filter and dust collector 200 The flow velocity becomes almost constant and the amount of dust collected in the bundle of filter cloth 230 becomes constant over all filter cloths 230. [

The shape of the perforation hole 310 is not limited to a circular shape but may be any other polygonal shape.

The dust collected uniformly with respect to all the filter cloths 230 increases the efficiency of the air pulse exhausting performed at regular intervals.

The curved blade 610 of the curved blade frame 600 and the beveled blade 710 of the beveled blade frame 700 may be rotated in the same manner as the perforation hole 310 of the distribution plate 300, The flow rate distribution can be made constant in the course of the fluid in the dust collector 400 having the rotational force being lifted up to the rectangular filter 200.

Since the velocity of the gas obtained from the rotating gravity dust collector 400 is slow at the central portion and goes outward, the velocity is fast and the velocity is slowed by the high speed fluid hitting the curved blade 610 and the oblique blade 710 The flow velocity becomes constant in the process of being sucked into the rectangular filter 200. [

On the other hand, the filter cloths 230 are uniformly arranged at equal intervals in all the spaces of the rectangular parallelepiped filtration and desiccator 200, and have a cylindrical shape with a closed end at one end, and have a net- And has a frame so that the shape of the filter cloth 230 is not distorted by positive pressure or negative pressure.

The dust trapped on the surface of the filter cloth 230 is removed by air pulse exhaustion at regular intervals and the air pulse exhaust is compressed in the compressed air injection pipe 210 from the inside to the outside of the outer surface of the filter cloth 230 It is performed by releasing air.

The dust collected on the outer surface of the filter cloth 230 is separated outwardly from the outer surface of the filter cloth 230 by the force of the compressed air and is discharged to the rotating gravity dust collector 400 And the rotary valve 420 is opened at a predetermined cycle to discharge the dust.

The gas suction pump 530 functions to collect dust by forming a negative pressure on the filter fabric 230 bundled with the rectangular filter dust collector 200. The gas suction pump 500 is installed at the upper portion of the rectangular filter dust collector 200 And the gas exhaust duct 550. The gas exhaust duct 510 and the gas exhaust duct 550 are connected to each other.

The gas suction pump 530 is installed on the floor provided with the fixed pedestal of the composite filter dust collector to enhance the maintenance property and to prevent the vibration generated when the gas suction pump 530 is operated from being transmitted to the composite filter dust collector, Increase durability.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. will be.

It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive, the scope of the invention being described in the foregoing specification is defined by the appended claims, Ranges and equivalents thereof are to be construed as being included within the scope of the present invention.

101: Combined filtration dust collector combined with a rectangular filtration dust collector and a rotating gravity dust collector
200: square filtering dust collector
210: Compressed air injection piping
230: Filter cloth
300: distribution plate
310: Pore hole
400: rotating gravity dust collector
410: gas inlet
420: Rotary valve
500: gas outlet
510: Gas suction duct
530: Gas suction pump
550: gas discharge duct
600: Curved wing frame
610: Curved wing
700: incline wing frame
710: oblique wing

Claims (6)

A rotating gravity dust collector 400 which sinks coarse dust by the gravitational force generated by the turbulent gas introduced from the gas inlet 410 and processes the dust by gravity;
A pore hole 310 having a different size is formed according to a position of the rotating gravity dust collector 400 and a position where the dust trapping filter 150 is firstly passed through the rectangular filtering dust collector 200 from the rotating gravity dust collector 400 A distribution plate 300 for uniformizing the amount of compressed air sucked into the rectangular filter 200; And a quadrangular filter 260 for collecting dust by a suction force by a gas suction pump 530 at an upper portion of the filter fabric 230.
Lt; / RTI >
Wherein the pore hole (310) of the diagonal portion of the distribution plate (300) is enlarged and the pore hole (310) of the remaining portion is made small. delete A rotating gravity dust collector 400 which sinks coarse dust by the gravitational force generated by the turbulent gas introduced from the gas inlet 410 and processes the dust by gravity;
A pore hole 310 having a different size is formed according to a position of the rotating gravity dust collector 400 and a position where the dust trapping filter 150 is firstly passed through the rectangular filtering dust collector 200 from the rotating gravity dust collector 400 A distribution plate 300 for uniformizing the amount of compressed air sucked into the rectangular filter 200; And a quadrangular filter 260 for collecting dust by a suction force by a gas suction pump 530 at an upper portion of the filter fabric 230.
Lt; / RTI >
A curved blade 610 having a convexly curved upper portion is provided between the rotary gravity dust collector 400 and the rectangular filter 260 so that the flow rate distribution of the fluid sucked into the filter cloth 230 is constant, And a frame (600). The combined filtration dust collector (101) comprises a rectangular filtration dust collector and a rotating gravity dust collector. A rotating gravity dust collector 400 which sinks coarse dust by the gravitational force generated by the turbulent gas introduced from the gas inlet 410 and processes the dust by gravity;
A pore hole 310 having a different size is formed according to a position of the rotating gravity dust collector 400 and a position where the dust trapping filter 150 is firstly passed through the rectangular filtering dust collector 200 from the rotating gravity dust collector 400 A distribution plate 300 for uniformizing the amount of compressed air sucked into the rectangular filter 200; And a quadrangular filter 260 for collecting dust by a suction force by a gas suction pump 530 at an upper portion of the filter fabric 230.
Lt; / RTI >
An inclined wing frame 700 is installed between the rotary gravity dust collector 400 and the rectangular filter 200 to provide a constant flow velocity distribution of the fluid sucked into the filter cloth 230 by providing an inclined wing 710 in the middle of the four corners. And a rotary dust collector connected to the filtering unit. 4. The method according to any one of claims 1 to 3,
And a compressed air injection pipe 210 for injecting compressed air outwardly from the inside of the filter cloth 230 to periodically perform air pulse exhaustion to remove dust, and a rotary vacuum cleaner combined with a rotary gravity dust collector (101). 4. The method according to any one of claims 1 to 3,
A combined filtration dust collector 101 combined with a rectangular filtration dust collector and a rotary gravity dust collector further includes a rotary valve 420 installed at a lower portion of the rotating gravity dust collector 400 to discharge dust collected at a lower portion of the rotating gravity dust collector 400 ).

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