KR200172477Y1 - A low pressure type dust collector - Google Patents

Abstract

The present invention inhales the polluted air outside by the cyclone rotation method and filters it through a plurality of bag filters so that only clean air can be discharged to the outside, improving working conditions in the workplace and preventing various environmental pollution. The low pressure dust collector can improve the quality of the product.

Description

Low pressure dust collector {A LOW PRESSURE TYPE DUST COLLECTOR}

The present invention relates to a low pressure dust collector, and more particularly, the outside contaminated dust-containing air is sucked by a cyclone rotation method and filtered through a plurality of bag filters so that only clean air can be discharged to the outside of the workplace. In addition to improving working conditions, it is possible to prevent various environmental pollution and to improve the quality of products.

In general, dust collector is a kind of machine that removes solid and liquid fine particles floating in the air, and is a soot contained in exhaust gas generated from boilers, roasters, heating furnaces, waste incinerators, etc. To improve working conditions and improve product quality through air and dust removal, or to clean air in mills, feed mills, and pharmaceutical factories, and to collect zinc oxide and carbon black from various manufacturing processes. Used for

Such dust collectors are roughly classified into various types such as mechanical, electrical, dry, and wet. Particles up to 5 µm in size are mechanically dry (gravity settling chambers, colliders, cyclones, etc.) with simple structures, and dust collectors can be collected with dust collectors with low pressure loss (100 to 300 mm, etc.) up to 1 µm. have. However, dust collection to ultra-fine particles of 1 μm or less is expensive because it has to be made large. In the large flow rate at which the flow rate of the processing gas is 2000 to 3000 mPa / min or more, the electrostatic precipitator can reduce the power cost, and a dry bag filter is preferable at the small to medium flow rate.

Cyclone is a representative of dust collectors and refers to a dust separation device using centrifugal force generated by swirl flow of fluid.

Of these, when the fluid is a gas, it is generally used as a cyclone and separates suspended solid particles or micro droplets existing in the gas. On the other hand, when the fluid is a liquid, hydrocyclone or liquid cyclone is used. Collectively, suspended solid particles existing in a liquid are separated by particle size or specific gravity.

The cyclone 200 is composed of a cylindrical portion 210 and a cone portion 220 (usually in the shape of a venturi tube) as shown in FIG. For example, when externally impregnated air is injected from the side wall of the cylindrical portion 210 in the direction of the arrow, the impregnated air is continuously turned along the inner wall of the cylindrical portion 210 so that heavy dust is conical portion 220. Make sure to fall below the inner circumference of the) and allow the purified air to rise upward to purify the air.

During this process, the dust contained in the air is moved by the action of centrifugal force, moved in the radial direction, separated from the air, and descended in a spiral shape along the inner circumference of the cone portion 220 and discharged to the vertex of the cone portion 220. Will be.

As described above, the gas cyclone 200 uses a pressure loss of 100 to 200 mmH 遙 O and an inlet wind speed of about 15 to 20 m / s, and is able to separate dust of several micrometers and is widely used.

Accordingly, the present applicant intends to propose a low pressure dust collector which can clean the turbid air at various pollution sites such as milling mill, feed mill, pharmaceutical plant, etc. using the useful functions of the cyclone 200 as described above. It is.

Accordingly, the present invention has been made through the above proposal, the purpose is to provide a low-pressure dust collector to discharge only clean clean air by filtering the outside contaminated air through a plurality of bag filters. have.

In addition, an object of the present invention is to provide a low-pressure dust collector with a very good ability of dust collection by allowing the dust pile adsorbed on the outer periphery of the bag filter to be temporarily separated using the forward blow pressure of the compressed air tank. .

In addition, an object of the present invention is to provide a low pressure dust collector for easy operation and less trouble by allowing a plurality of opening and closing valves to be opened and closed in a pulse type through the solenoid valve that the forward ejection pressure provided to the bag filter is controlled by the controller. In providing.

1 is a schematic diagram for explaining the principle of a general cyclone.

Figure 2 is a perspective view showing a low pressure dust collector according to the present invention.

Figure 3 is a schematic half-sectional view showing a low pressure dust collector according to the present invention.

Figure 4 is a detailed cross-sectional view for explaining the operation of the on-off valve applied to the low-pressure dust collector according to the present invention.

Figure 5a is an explanatory view in a plan view of the dust adsorption state of the bag filter applied to a low-pressure dust collector according to the present invention.

Figure 5b is an explanatory view viewed from the plane of the dust separation state of the bag filter applied to a low-pressure dust collector according to the present invention.

Explanation of symbols on the main parts of the drawings

1: solenoid valve 10: clean air tank

11: clean air outlet hole 20: compressed air tank

21: upper nozzle hole 22: lower nozzle hole

23: guide tube 24: satellite hole

30: injection nozzle 40: on-off valve

41: first diaphragm 41a: even hole

42: first case 42a: center hole

42b: spring support jaw 43: second diaphragm

44: second case 44a: tube hole

45: bolt 46: extrusion spring

50 tube 60 cyclone portion

61: vacuum air suction hole 62: door

70: partition plate 71: filter hole

72: protruding jaw 72a: thread

80: bag filter 81a: screw groove

91: rotary valve 92: suction fan

93: pressure providing means 100: low pressure dust collector

The present invention for achieving the above object is equipped with a solenoid valve for sequentially providing the suction pressure or the ejection pressure to a plurality of tubes under the control of the controller, and a rotary valve for discharging dust piles on the lower side and external pollution on the side. A low pressure dust collector comprising a cyclone portion having a vacuum air suction hole for sucking the compressed air;

A plurality of bag filters which open at the top and are elongated in a cylindrical shape to filter external vacuum-containing air;

A disk-shaped partition plate having a plurality of filter holes corresponding to the plurality of bag filters uniformly arranged in the cyclone part to seal an upper portion of the cyclone part;

A plurality of on / off valves that are opened and closed by sequentially receiving the suction pressure or the ejection pressure of the solenoid valve controlled by the controller through the plurality of tubes;

A plurality of upper nozzle holes and lower nozzle holes corresponding to the plurality of open / close valves are respectively drilled on the upper and lower sides, and the satellite holes are intermittently drilled around the upper nozzle holes, and the outer side provides forward ejection pressure to the side. Clean air tank having a guide pipe connected to the pressure providing means of;

When the on-off valve is opened, a plurality of injection nozzles respectively inserted upright into the upper nozzle hole and the lower nozzle hole so that the forward blow pressure of the compressed air tank flows through the satellite hole, and then can be instantaneously injected into the bag filter. and;

Built-in a plurality of injection nozzles, including the compressed air tank, and sucks the intake air from the intake air suction hole into the bag filter while filtering only the clean air through the reverse suction pressure of the suction fan It is a basic feature of the technical configuration that comprises a clean air tank coupled to the partition plate having a clean air discharge hole discharged to the outside.

Hereinafter, a preferred embodiment of the low pressure dust collector according to the present invention will be described with reference to FIGS. 2 to 4.

Figure 2 is a perspective view showing a low pressure dust collector according to the present invention, Figure 3 is a schematic half sectional view showing a low pressure dust collector according to the present invention, Figure 4 is a detail showing an opening and closing valve applied to the low pressure dust collector according to the present invention It is a cross section.

Low pressure dust collector 100 according to the present invention is provided with a solenoid valve to sequentially provide a suction pressure or a discharge pressure to a plurality of tubes 50 by the control of a controller (not shown) as shown in FIGS. (1) and a rotary valve 91 for discharging dust piles at the lower part, and a vacuum air suction hole 61 for sucking external polluted air on the side and a door 62 serving as an internal passage. Each cyclone unit 60 is prepared.

The solenoid valve 1 is provided to the inlet pressure or the ejection pressure to the plurality of tubes 50 in sequence, that is, pulse type by the control of the controller to open and close the valve 40 to be described later alternately, The door 62 is used as a working passage when inspecting the interior of the cyclone part 60 or replacing the bag filter 80 which will be described later.

A plurality of bag filters (80) mentioned above are open at the top and are formed to have a long cylindrical shape to filter external vacuum air, and pass only pure air when inhaling contaminated air from outside. Dust and the like are adsorbed on the outer circumference thereof to exert a cleaning effect. On the other hand, if a momentary injection pressure is provided outward from the center of the bag filter 80, the dust pile adsorbed on the outer periphery is naturally dropped by the impact.

A disk-shaped partition plate 70 having a plurality of filter holes 71 corresponding to a plurality of bag filters 80 uniformly disposed therein is mounted and sealed on the upper portion of the cyclone portion 60.

The solenoid valve 1 controlled by the controller is connected to a plurality of on / off valves 40 which are sequentially opened and closed by receiving suction pressure or ejection pressure through a plurality of tubes 50, and the plurality of on / off valves ( 40, the injection nozzles 30 are respectively connected upright.

That is, when the on-off valve 40 is opened, the upper nozzle hole so that the forward ejection pressure of the compressed air tank 20, which will be described later, flows through the satellite hole 24 and can be sprayed into the bag filter 80 instantaneously. 21 and the lower nozzle hole 22, respectively, are fitted upright.

Here, the compressed air tank 20 has a plurality of upper nozzle holes 21 and lower nozzle holes 22 corresponding to the plurality of open / close valves 40 at upper and lower portions thereof, respectively. And the lower nozzle hole 22 is linearly aligned with the upright direction of the bag filter 80. In addition, a satellite tube 24 is intermittently drilled around the upper nozzle hole 21, and a guide pipe connected to an external pressure providing means 93 that provides a forward ejection pressure to a side of the compressed air tank 20. 23 is provided.

The satellite hole 24 is intermittently drilled around the upper nozzle hole 21 and is called a satellite hole. The satellite hole 24 is a jet nozzle from the compressed air tank 20. It is used as a passage of the ejection pressure provided to the 30, the pressure providing means 93 provides a low pressure, for example, a pressure of 0.3 ~ 0.7 bar to the compressed air tank 20 to open the injection nozzle 30 In case of loss, it is possible to act on the bag filter 80 at the instant of the ejection pressure at a moment of 0.1 to 0.3 sec.

Meanwhile, the plurality of injection nozzles 30 including the compressed air tank 20 are embedded in the clean air tank 10 coupled to the cyclone part 60 with the partition plate 70 interposed therebetween. The tank 10 filters the vacuum air introduced from the vacuum air suction hole 61 of the cyclone part 60 into the bag filter 80 while filtering the clean air to the external suction fan 92. It is made of a structure having a clean air discharge hole (11) to supply to.

The suction fan 92 provides a reverse suction pressure to the clean air tank 10 so that externally contaminated air is introduced into the cyclone unit 60 through the vacuum-containing air suction hole 61 and then a plurality of bags. Only the pure air is allowed to escape through the filter 80 and the clean air discharge hole 11.

Next, the on-off valve 40 will be described in more detail as follows.

The on-off valve 40 serves to pulse open and close the injection nozzle 30 fitted in the upper nozzle hole 21 of the compressed air tank 20 under the control of the solenoid valve 1, and in a specific structure thereof. As shown in FIG. 4, the first diaphragm 41 including a satellite hole 24 of the partition plate 70 therein and having a few equal holes 41a to close and open the upper end of the injection nozzle 30 in close contact. ) Is ready.

The equal hole 41a of the first diaphragm 41 always matches the pressure around the extrusion spring 46 to be described later with the pressure provided from the satellite hole 24 of the compressed air tank 20. At least two or three holes should be drilled.

The first case 42 is stacked on the first diaphragm 41, and the first case 42 includes a center hole 42a formed with a spring support jaw 42b for supporting the extrusion spring 46. The bolt 45 is coupled to the partition plate 70 while the first diaphragm 41 is embedded therein.

On the first case 42, a second case 44 having a tube hole 44a which is bored in the vertical direction of the center and communicates with the tube 50 is coupled to the bolt 45, and the second case ( Between the 44 and the first case 42, a second diaphragm 43 which opens and closes the center hole 42a in association with the suction pressure or the ejection pressure flowing through the tube 50 as the solenoid valve 1 is opened and closed. ) Is sandwiched.

In addition, the above-mentioned extrusion spring 46 is supported by the spring support jaw 42b of the center hole 42a to pressurize the first diaphragm 41 to seal the injection nozzle 30 at all times. do.

On the other hand, the bag filter 80 for filtering the external vacuum air must be replaced when used for a long time, in order to facilitate such replacement work extending downward from the inner circumference of the filter hole 71 of the partition plate 70 And a protrusion jaw 72 having a thread 72a formed therein, and screw grooves 81a formed at the inner circumference of the bag filter 80 are screwed to the threads 72a of the protrusion jaw 72 to each other. Detachable work can be facilitated.

Referring to the operation and action of the low-pressure dust collector 100 according to the present invention made in the above configuration with reference to Figure 5 as follows.

5A is an explanatory diagram showing a dust adsorption state of the bag filter applied to the low pressure dust collector according to the present invention, and FIG. 5B is an explanatory diagram showing the dust separation state of the bag filter applied to the low pressure dust collector according to the present invention.

First, when the suction fan 92 communicated with the clean air discharge hole 11 is driven, reverse suction pressure is applied to the clean air tank 10 to filter the vacuum-containing air of the cyclone part 60 through the bag filter 80. While being sucked in the reverse direction and discharged (dotted arrows shown in Figs. 3 and 5a).

That is, when the suction fan 92 is continuously driven, the vacuum-containing air existing outside the cyclone part 60 is introduced while turning into the cyclone part 60 through the vacuum-containing air suction hole 61 and then back. At the same time as filtered by the filter 80, only pure clean air is discharged to the clean air discharge hole 11 and the suction fan 92 via the clean air tank (10).

At this time, a large number of dust piles are attached to the outer circumference of the bag filter 80 by the reverse suction pressure of the suction fan 92 as shown in FIG. 5A.

On the other hand, the compressed air tank 20 built in the clean air tank 10 has a forward blow pressure, for example, 0.3 to 0.7 bar supplied from an external pressure providing means 93 through a guide tube 23. Pressure will be filled.

The forward ejection pressure filled in the compressed air tank 20 is instantaneously, for example, 0.1 to 0.3 sec. Through the injection nozzle 30 in accordance with the opening and closing of the on-off valve 40 which is sequentially opened and closed pulsed by the controller. Instantly sprayed on the bag filter 80 at the moment to shake off the dust adsorbed on the outside of the bag filter 80 (solid line arrows shown in Figs. 3 and 5b).

At this time, the dust pile adsorbed on the outer circumference of the bag filter 80 is cleanly separated as shown in Figure 5b is to be transferred to a separate storage space by the rotary valve 91 of the cyclone portion (60).

Referring to the operation of the plurality of on-off valve 40 in more detail as follows.

First, the compressed air tank 20 is continuously filled with, for example, a compression pressure of 0.3 to 0.7 bar, that is, a forward ejection pressure supplied from an external pressure providing means 93. This forward ejection pressure may be injected at a speed close to the maximum sound speed when injected through the injection nozzle (30).

The solenoid valve 1 controlled by an external controller provides a suction pressure as shown in FIG. 4A through the plurality of tubes 50, or as shown in FIG. 4B. Provide blowout pressure.

These suction pressures or ejection pressures are alternately provided to the plurality of on / off valves 40 in accordance with the opening and closing of the solenoid valve 1 which is sequentially controlled by the controller, that is, pulsed, and further to the cyclone part 60. It is applied to the number of injection nozzles 30 corresponding to the plurality of filter bags arranged so that the forward ejection pressure of the compressed air tank 20 can be sequentially injected to the bag filter 80.

For example, when the ejection pressure is provided from the solenoid valve 1 by the control of the controller, as shown in (b) of FIG. 4, the second diaphragm 43 has the center hole 42a of the first case 42. At this time, the pressure of the caution of the extruded spring 46 fitted to the spring support jaw 42b of the first case 42 is equal to the equal hole 41a of the first diaphragm 41 and the compressed air tank 20. Since the satellite holes 24 are in communication with each other, the pressure is equal to the pressure of the compressed air tank 20, and the injection nozzle 30 is formed by the first diaphragm 41 that is eventually pressed by the extrusion spring 46. Will be sealed.

In this case, the reverse suction pressure of the suction fan 92 is applied to the bag filter 80 that is linearly matched to the lower part of the injection nozzle 30 so that dust powder contained in the external vacuum air can be continuously adsorbed. do.

On the other hand, when the suction pressure is provided from the solenoid valve 1 by the control of the controller, as shown in FIG. 4A, the second diaphragm 43 is spaced apart from the center hole 42a of the first case 42. It is maintained so that the pressure around the extrusion spring 46 is instantaneously exits the clean air discharge hole 11 through the clean air tank (10).

In this way, when the pressure around the extrusion spring 46 immediately exits the clean air tank 10, the first diaphragm 41 instantly opens the injection nozzle 30 while pushing up the extrusion spring 46. As soon as the injection nozzle 30 is opened, the forward ejection pressure of the compressed air tank 20 is applied to the bag filter 80 at a speed close to the speed of sound through the satellite hole 24 and the injection nozzle 30. As a result, the dust pile adsorbed on the outer circumference of the bag filter 80 may be transferred to the outside through the lower rotary valve 91 at an instant.

Thereafter, when the ejection pressure is again supplied from the solenoid valve 1 by the control of the controller, the second diaphragm 43 seals the center hole 42a of the first case 42, and the first diaphragm 41 ) Seals the injection nozzle 30 naturally by the extrusion pressure of the extrusion spring 46 so that the reverse suction pressure of the suction fan 92 acts on the bag filter 80.

At this time, the first diaphragm 41 is provided with a few even holes (41a) can accept the pressure of the compressed air tank 20 through the satellite hole 24 as it is, and eventually the extrusion spring 46 The surrounding pressure and the pressure inside the compressed air tank 20 can be made equal to each other so that the injection nozzle 30 is naturally sealed by the extrusion pressure of the extrusion spring 46.

On the other hand, when the low-pressure dust collector 100 is driven for a long time, the life of the bag filter 80 has to be replaced, and in this case, the door 62 of the cyclone part 60 is opened after stopping the operation of the dust collector. The bag filters 80 may be removed one by one and then replaced with new ones.

At this time, since the bag filter 80 is fixed to the protrusion jaw 72 protruding downward from the inner circumference of the filter hole 71 of the partition plate 70 by screwing, the detachment of the bag filter 80 can be made more easily. Will be.

As described above, the low-pressure dust collector 100 according to the present invention has the following beneficial effects.

First, after inhaling the polluted air outside by the cyclone rotation method, it can be filtered through a plurality of bag filters 80 to discharge only clean air to the outside, thereby improving the working conditions of the workplace and various environmental pollution. It can be prevented and has an excellent effect to improve the quality of the product.

Second, by allowing the dust pile adsorbed on the outer circumference of the bag filter 80 to be temporarily separated using the forward ejection pressure of the compressed air tank 20, the ability of dust collection is very excellent and the cleaning efficiency is very good. There is.

Third, through the solenoid valve 1 in which the forward ejection pressure provided to the bag filter 80 is opened and closed by the control of the controller, the plurality of open / close valves 40 can be opened and closed sequentially, that is, in a pulsed manner. This easy and trouble-free operation has the beneficial effect of automatically implementing the fractionation.

Fourth, since the bag filter 80 is fixed to the protrusion jaw 72 protruded downward from the inner periphery of the filter hole 71 of the partition plate 70, the replacement operation is very easy.

Claims (3)

The solenoid valve 1 which sequentially supplies the suction pressure or the ejection pressure to the plurality of tubes 50 by the control of the controller, and the rotary valve 91 which discharges the dust pile at the lower side are contaminated externally. A low pressure dust collector (100) comprising a cyclone portion (60) provided with a vacuum-containing air suction hole (61) for sucking air; A plurality of bag filters (80; bag filters) which open at an upper end thereof and are elongated in a cylindrical shape to filter external vacuum air; A disk-shaped partition plate having a plurality of filter holes 71 corresponding to the plurality of bag filters 80 uniformly disposed in the cyclone part 60 to seal the upper portion of the cyclone part 60. 70 and; A plurality of on / off valves 40 which are sequentially opened and closed by receiving the suction pressure or the ejection pressure of the solenoid valve 1 controlled by the controller through the plurality of tubes 50; A plurality of upper nozzle holes 21 and lower nozzle holes 22 corresponding to the plurality of open / close valves 40 are respectively drilled up and down at the same time, and the satellite holes intermittently drilled around the upper nozzle holes 21 ( A compressed air tank (20) having a guide tube (23) connected to an external pressure providing means (93) for providing a forward ejection pressure on a side thereof; When the on-off valve 40 is opened, the upper nozzle hole so that the forward blow pressure of the compressed air tank 20 flows through the satellite hole 24 and then sprays the bag filter 80 instantaneously. A plurality of injection nozzles 30, which are fitted upright in the 21 and lower nozzle holes 22, respectively; Built-in a plurality of injection nozzles 30, including the compressed air tank 20, and cleans by filtering the vacuum containing the air introduced from the suction air suction hole 61 into the interior of the bag filter (80). Iii) a clean air tank (10) coupled to the partition plate (70) with a clean air discharge hole (11) for discharging only air to the outside through the reverse suction pressure of the suction fan (92). Low pressure dust collector (100). The method of claim 1, The on-off valve 40, A first diaphragm 41 including a satellite hole 24 of the partition plate 70 therein and having a small number of equal holes 41a to close and open the upper end of the injection nozzle 30; A first case which is bored in the vertical direction of the center and has a center hole 42a formed with a spring support jaw 42b to incorporate the bolt 45 to the partition plate 70 while embedding the first diaphragm 41. With 42, A second case 44 having a tube hole 44a which is opened in a vertical direction of the center and communicates with the tube 50 and is coupled to the bolt 45 in a form of covering the first case 42; The center hole 42a is mounted between the first case 42 and the second case 44 and is linked to the suction pressure or the ejection pressure introduced through the tube 50 according to the opening and closing of the solenoid valve 1. A second diaphragm 43 for opening and closing a), And an extrusion spring 46 which is supported by the spring support jaw 42b of the center hole 42a and presses the first diaphragm 41 to seal the injection nozzle 30. Low pressure dust collector (100). The method of claim 1, A protruding jaw 72 extending downward from an inner circumference of the filter hole 71 of the partition plate 70 and having a thread 72a formed therein; Low pressure dust collector (100), characterized in that it further comprises a screw groove (81a) formed on the inner circumference of the bag filter (80) so that the screw thread (72a) of the protruding jaw (72).