JP5331641B2 - Cleaning dust collection equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide space-saving and inexpensive washing and dust collection equipment having superior mist separation performance as washing and dust collection equipment (ring slit washer, hereafter, RSW) for blast furnace gas etc. <P>SOLUTION: A precleaning chamber 11 is provided at the top part side of a mist separator (MS) built-in type RSW 10, a venturi scrubber 17 is provided at the bottom side of the MS built-in type RSW 10, and a mist separator 13 is provided between the precleaning chamber 11 and venturi scrubber 17 so as to surround an RSE inlet pipe 14 serving as a gas introducing pipe. A substantially cylindrical inner part 18 with a top side of an inner hollow part 18a directed toward an outlet duct 19 is provided in the mist separator 13 so as to surround a part of the RSE inlet pipe 14. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a cleaning and dust collection facility for cleaning and collecting exhaust gas (blast furnace gas and converter gas) from a furnace body such as a blast furnace and a converter in an ironworks.

  At steelworks, blast furnace gas and converter gas are recovered and used effectively as fuel gas. For example, furnace top pressure power generation is performed using blast furnace gas (see, for example, Patent Document 1).

  As described above, when effectively using blast furnace gas or converter gas (hereinafter referred to as blast furnace gas) as fuel gas, it is necessary to clean and collect the collected blast furnace gas so as to have a predetermined dust concentration level. .

  For this purpose, the cleaning dust collection equipment is roughly divided into wet cleaning dust collection equipment and dry cleaning dust collection equipment. In addition, wet cleaning dust collection equipment includes a ring slit washer and a venturi scrubber. (For example, refer to Patent Documents 1 and 2).

  Among them, a ring slit washer (hereinafter referred to as RSW) passes a preliminary cleaning chamber in which water is sprayed from a nozzle to blast furnace gas, etc., and a precleaned blast furnace gas, etc. Water from the Venturi scrubber called Ring Slit Element (hereinafter referred to as RSE), which adjusts the cross-sectional area of the gas flow path so that the gas flow rate can be changed, and blast furnace gas that has passed through the RSE This is a cleaning dust collection facility including a mist separator for separating (mist).

  The RSW includes a mist separator built-in type in which the mist separator (Mist Separator) is built in the RSW body (hereinafter referred to as MS built-in type RSW), and a mist separator that is independent from the RSW body. There is a formula (hereinafter referred to as MS independent RSW).

  FIG. 6 shows a conventional MS built-in type RSW 50, and this equipment is provided with a mist separation section 53 in an intermediate space between the preliminary cleaning chamber 51 and the RSE section 52. In this conventional MSRS RSW 50, first, blast furnace gas or the like is supplied to the preliminary cleaning chamber 51 and preliminarily cleaned with water from the nozzle. Next, the precleaned gas containing moisture (mist) is sent to the RSE section 52 via the RSE inlet pipe 54, then exits the RSE 55, reverses, and swirls through the swirl vane 57. To rise. The mist (moisture) is separated from the gas by the swirl force, drops on the wall of the RSE inlet pipe 54 and the like, and is drained out of the system through the drainage groove on the outer periphery of the swirl vane 57. The gas having been removed flows out from the outlet duct 59.

  On the other hand, FIG. 7 shows an MS independent RSW 60, and this equipment is provided with a mist separator 63 independently of an RSW body 60 ′ having a pre-cleaning chamber 61 and an RSE section 62. 'And the mist separator 63 are connected by a connecting duct 66. In the MS independent RSW 60, the mist-containing gas flowing out from the RSW main body 60 ′ (the preliminary cleaning chamber 61 and the RSE section 62) flows linearly into the mist separator 63 via the communication duct 66, and the swirl vane 67 is moved. Go down as you turn through. The mist (moisture) is separated from the gas by the turning force and adheres to the inner wall of the mist separator 63, is discharged out of the system from the drain receiver 68, and the gas from which the moisture has been removed flows out from the outlet duct 69.

JP 2006-213952 A JP 2003-010622 A

  However, in the conventional cleaning dust collecting apparatus 50 with a built-in mist separator shown in FIG. 6, the mist-containing gas swirls through the swirl blades 57 and rises while being separated from the mist by colliding with the mist on the inner wall. The swirl force of the contained gas is governed by the inclination angle of the guide vane 57 and tends to be a vertically rising flow, so that the swirl force that causes the mist to collide was weak. Further, in the cleaning dust collecting apparatus 50 with a built-in mist separator, the mist that is separated from the mist-containing gas and falls along the inner wall repeats separation and collection as the gas rises. Performance, that is, dust removal performance was inferior.

  On the other hand, in the mist separator independent cleaning and dust collecting equipment 60 shown in FIG. 7, an installation space for the mist separator 63 is required in addition to the RSW main body 60 '. Further, the cost is higher than that of the mist separator independent cleaning and dust collection facility 60.

  The present invention has been made in view of the above circumstances, and as a cleaning dust collection facility (ring, slit, washer) for blast furnace gas and the like, it has excellent mist separation performance and can save space and is low in cost. The purpose is to provide a cleaning and dust collection facility.

  One aspect of the present invention is a cleaning dust collection facility that removes dust contained in a gas discharged from a furnace body, and is preliminarily cleaned in a preliminary cleaning chamber for preliminary cleaning of the gas and the preliminary cleaning chamber A venturi scrubber connected to the precleaning chamber via a gas introduction pipe for introducing gas and changing the flow rate of the introduced gas; and installed between the precleaning chamber and the venturi scrubber, the venturi scrubber A mist separator that separates mist from the gas that has passed, a connection duct that guides the gas that has passed through the venturi scrubber to the top side of the mist separator, and a gas that has separated the mist by the mist separator to the outside of the mist separator It is provided in the mist separator so as to surround a discharge outlet duct and a part of the gas introduction pipe. An inner cylindrical portion having a substantially cylindrical shape whose top side of the inner hollow portion is directed to the outlet duct, and the mist separator causes the gas flowing in from the connection duct to flow onto the outer peripheral surface of the inner cylindrical portion. And when the gas that has flowed down reaches the lower end of the inner cylinder part, the gas is reversed and raised so as to pass through the inner hollow part of the inner cylinder part, and then from the outlet duct. The present invention relates to a cleaning and dust collection facility characterized by flowing out.

  According to one aspect of the present invention, as described above, by providing the inner cylinder portion in the mist separator, interference between the mist-containing gas and the water removal gas can be suppressed, and the mist separation performance can be improved.

  At this time, in one aspect of the present invention, the preliminary cleaning chamber is provided on the top side of the cleaning dust collection equipment, the venturi scrubber is provided on the bottom side of the cleaning dust collection equipment, and the mist separator is the gas inlet. It may be installed between the preliminary cleaning chamber and the venturi scrubber so as to surround the tube.

  In this way, by incorporating the mist separator, space can be saved as compared with the mist separator independent cleaning dust collection equipment.

  In one aspect of the present invention, the mist separator has a substantially cylindrical shape, and the inner cylinder portion has a length equal to or greater than the diameter of the introduction portion of the connection duct to the mist separator, and the introduction portion The gas that has passed through the venturi scrubber may flow into the gap between the inner peripheral surface of the mist separator and the outer peripheral surface of the inner cylinder portion.

  In this way, the gas peripheral speed in the vicinity of the inner peripheral surface of the mist separator can be increased to increase the turning force, so that the mist easily collides with and adheres to the inner peripheral surface of the mist separator. Can be increased.

  In the aspect of the invention, the introduction unit may cause the gas that has passed through the venturi scrubber to flow in from a tangential direction of the inner peripheral surface of the mist separator.

  If it does in this way, the gas conveyed to the upper part of the mist separator will flow while flowing into the gap between the inner peripheral surface of the mist separator and the outer peripheral surface of the inner cylinder portion, and mist separation can be performed efficiently. It becomes like this.

  In the present invention, as a cleaning dust collection facility (ring / slit / washer) for blast furnace gas or the like, a low-cost cleaning dust collection facility can be provided by achieving excellent mist separation performance and space saving.

1 is an overall view showing a cleaning dust collection facility with a built-in mist separator according to an embodiment of the present invention. It is a top view of the principal part of the cleaning dust collection equipment with a built-in mist separator concerning one embodiment of the present invention. It is a top view of the modification of the principal part of the mist separator built-in type cleaning dust collection equipment which concerns on one Embodiment of this invention. It is sectional drawing of the principal part of the washing | cleaning dust collection equipment with a built-in mist separator which concerns on one Embodiment of this invention. It is a top view of the principal part of the cleaning dust collection equipment with a built-in mist separator concerning one embodiment of the present invention. It is a figure which shows the conventional washing | cleaning dust collection equipment with a built-in mist separator. It is a figure which shows a mist separator independent-type washing | cleaning dust collection equipment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The present embodiment described below does not unduly limit the contents of the present invention described in the claims, and all the configurations described in the present embodiment are essential as means for solving the present invention. Not necessarily.

  FIG. 1 is an overall view showing a cleaning dust collection facility (MS built-in type RSW) with a built-in mist separator according to an embodiment of the cleaning dust collection facility of the present invention, and FIG. 2 is a plan view of the main part thereof. FIG. 3 is a modified example thereof, FIG. 4 is a cross-sectional view of the relevant part, and FIG. 5 is a plan view of an opening from the inner cylinder part provided in the mist separator to the outlet duct.

  As shown in FIG. 1, the MS built-in type RSW 10 according to this embodiment includes a pre-cleaning chamber 11 for pre-cleaning by injecting water from a nozzle to an inflowing gas (blast furnace gas or the like), and passing the pre-cleaned gas A venturi scrubber 17 that adjusts the cross-sectional area of the gas flow path to freely change the gas flow rate, and a substantially cylindrical mist separation section (MS) that functions as a mist separator that separates the mist from the gas that has passed through the venturi scrubber 17. (Compartment) 13 is provided. In this embodiment, the pre-cleaning chamber 11 is provided on the top side of the MS built-in type RSW 10, the venturi scrubber 17 is provided on the bottom side of the MS built-in type RSW 10, and the mist separation section 13 serves as a gas introduction pipe. Is installed between the pre-cleaning chamber 11 and the venturi scrubber 17.

  In the present embodiment, the venturi scrubber 17 includes an RSE inlet pipe 14, a ring split element (RSE) 15, and a ring slit element section (RSE section) 12, as shown in FIG. It is. The RSE inlet pipe 14 functions as a gas introduction pipe for introducing the gas precleaned in the preclean chamber 11 into the RSE section 12. The RSE 15 has a function of adjusting the gas flow rate by adjusting the cross-sectional area on the output side of the RSE inlet pipe 14. The RSE section 12 is provided on the bottom side of the MSW built-in RSW 10 and becomes a partition space (chamber) on the gas output side whose gas flow rate is changed by the RSE 15.

  In the present embodiment, the mist separation section 13 is installed in an intermediate space between the preliminary cleaning chamber 11 and the RSE section 12. That is, as shown in FIG. 1, the RSE section 12 is connected to the precleaning chamber 11 via the RSE inlet pipe 14 serving as a gas introduction pipe for introducing the gas preliminarily cleaned in the precleaning chamber 11, so that the mist separation section 13 is provided between the pre-cleaning chamber 11 and the RSE section 12 so as to surround the RSE inlet pipe 14.

  In addition, as shown in FIG. 1, the MS built-in type RSW 10 according to the present embodiment includes a connection duct 16, a drain receiver 20, an outlet duct 19, and an inner cylinder portion 18. To do.

  The connection duct 16 allows the gas that has passed through the RSE section 12 of the venturi scrubber 17 to pass through the outside of the RSW iron shell 22 that forms the outer wall of the mist separation section 13 and then to the upper side (top side) of the mist separation section 13. Lead. Note that the connection duct 16 is not limited to a configuration in which the gas that has passed through the RSE section 12 is guided to the upper side of the mist separation section 13 and that passes through the outside of the RSW core 22. The drain receiver 20 is provided on the bottom side of the mist separation section 13 and receives and drains the mist (water) separated from the gas in the mist separation section 13. The outlet duct 19 discharges the gas separated from the mist in the mist separation section 13 to the outside of the mist separation section 13. The inner cylinder portion 18 is provided in the mist separation section 13 so as to surround a part of a plurality of (three in this embodiment) RSE inlet pipes 14 for transporting gas from the preliminary cleaning chamber 11 to the RSE section 12. The top side of the inner hollow portion 18 a is directed to the outlet duct 19. In the present embodiment, three RSE inlet pipes 14 are provided, but the number of RSE inlet pipes 14 is not limited to three, and may be two or more or one.

  Moreover, in this embodiment, the outflow port 16a used as the introduction part to the mist separation | separation division 13 of the connection duct 16 is with respect to the RSW iron skin 22 of the upper part (top part side) of the mist separation | segmentation division 13, as shown in FIG. The gas passing through the venturi scrubber 17 is caused to flow from the tangential direction of the inner peripheral surface of the mist separation section 13. By providing the outlet 16a of the connection duct 16 in this way, the gas transported to the upper part of the mist separation section 13 causes the gap portion 13a between the inner peripheral surface of the mist separation section 13 and the outer peripheral surface of the inner cylindrical portion 18 to be formed. It turns into the mist separation section 13 while turning.

  In addition, the installation direction of the outlet 16a of the connection duct 16 is not limited to the direction in which gas flows in from the tangential direction with respect to the RSW core 22. That is, the outlet 16 a of the connection duct 16 flows into the mist separation section 13 while turning to the gap portion 13 a between the inner peripheral surface of the mist separation section 13 and the outer peripheral surface of the inner cylinder portion 18. As long as it is installed. For example, as shown in FIG. 3, even if the outlet 16a of the connection duct 16 is installed so as to face the front side of the inner cylinder portion 18, the RSW iron skin 22 (of the mist separation section 13) is connected to one end of the outlet 16a. By providing the wall portion 13b that blocks the inflow of gas in the gap portion 13a between the inner circumferential surface) and the outer circumferential surface of the inner cylinder portion 18, the gas flowing in from the outlet 16a is swirled in the gap portion 13a. The gas can be sent into the mist separation section 13.

  Further, as shown in FIG. 4, the inner cylinder portion 18 has an upper end that coincides with an upper end of the outlet 16 a of the connection duct 16, and a lower end that is a predetermined height position up to the drain receiver 20. For this reason, the gas flowing in from the outlet 16 a of the connection duct 16 is guided so as to collide with the outer peripheral surface of the inner cylindrical portion 18 and the inner wall of the RSW iron shell 22. Incidentally, the upper end and the lower end of the inner cylinder 18 are opened.

  Further, in the present embodiment, as shown in FIG. 4, the length L in the longitudinal direction of the inner cylindrical portion 18 is longer than the diameter W of the outlet 16 a serving as an introduction portion to the mist separation section 13 of the connection duct 16. Have For this reason, the gas that has passed through the RSE section 12 of the venturi scrubber 17 flows from the outlet 16a into the gap 13a between the inner wall of the RSW iron shell 22 of the mist separation section 13 and the inner cylinder section 18, and enters the RSE inlet. By circumventing the tube 14, the inside of the gap 13 a can be swung along the outer peripheral surface of the inner cylindrical portion 18 (inner wall of the RSW iron skin 22). As a result, the gas rotation is not inhibited by the RSE inlet pipe 14, so that the gas peripheral speed in the vicinity of the inner peripheral surface of the mist separation section 13 can be increased to increase the turning force. For this reason, since the mist contained in the gas that has passed through the venturi scrubber 17 easily collides with and adheres to the inner peripheral surface of the mist separation section 13, the mist separation performance can be improved.

  In the present embodiment, a partition plate 21 is provided between the outer periphery of the upper end of the inner cylinder portion 18 and the upper end of the outlet 16a of the connection duct 16 to partition the mist separation section 13 from the outside. Specifically, the partition plate 21 is provided so as to block between the outer periphery of the upper end of the inner cylinder portion 18 and the inner periphery of the upper end of the mist separation section 13. Then, the partition plate 21 has a portion excluding the RSE inlet pipe 14 on the inner side of the inner cylindrical portion 18, as shown by a hatched portion in FIG. 5, from the inner hollow portion 18 a of the inner cylindrical portion 18 to the outlet duct 19. It becomes the opening 18b.

  With such a configuration, the gas flowing into the mist separation section 13 from the outlet 16a of the connection duct 16 is prevented from flowing upward, and the gas introduced from the connection duct 16 is prevented from flowing to the outer peripheral surface of the inner cylinder portion 18. It will be able to flow down while turning along. Then, when the gas flowed down while swirling along the outer peripheral surface of the inner cylinder portion 18 reaches the lower end portion of the inner cylinder portion 18, the gas is reversed and raised so as to pass through the inner hollow portion 18 a and flows out from the outlet duct 19. To come.

  Moreover, the drain receptacle 20 is installed above the upper end of the inflow port 16b of the connection duct 16, as shown in FIG. As a result, the gas that has passed through the RSE section 12 does not flow directly to the mist separation section 13 without passing through the connection duct 16.

  Note that the guide vane 57 installed in the conventional MS built-in type RSW 50 shown in FIG. 6 is abolished here in order to reduce the pressure loss and simplify the structure.

  In the MS built-in type RSW 10 according to the present embodiment configured as described above, first, blast furnace gas or the like is supplied to the preliminary cleaning chamber 11 and preliminarily cleaned with water from the nozzle. Next, the pre-cleaned gas (mist-containing gas) containing moisture (mist) is sent to the RSE section 12 via the RSE inlet pipe 14 and then exits the RSE 15 as shown in FIG. It reverses (arrow A1), passes through the connection duct 16 (arrow A2), is guided to the upper part of the mist separation section 13 (arrow A3), and flows into the mist separation section 13 while turning (arrow A4). The mist-containing gas flowing into the mist separation section 13 descends while turning around the gap 13a between the inner wall of the RSW iron shell 22 and the outer peripheral surface of the inner cylinder portion 18, and the mist is gasified by the turning force. And is attached to the inner wall of the RSW iron skin 22 of the mist separation section 13 and is discharged from the drain receiver 17 to the outside of the system. On the other hand, the gas from which moisture has been removed (moisture removal gas) is inverted and raised at the lower end portion of the inner cylinder portion 18 (arrow A5) and passes between the inner hollow portion 18a of the inner cylinder portion 18 and the RSE inlet pipe 14. (Arrow A6), flows out from the outlet duct 19.

  Thus, in the MS built-in type RSW 10 according to this embodiment, the mist-containing gas is guided to the upper part of the mist separation section 13 via the connection duct 16 and flows into the mist separation section 13 while turning. Therefore, the flow is not hindered by the falling mist that is separated from the mist-containing gas and falls.

  Further, by providing the inner cylinder portion 18, interference between the mist-containing gas and the water removal gas that has flowed in via the connection duct 16 is suppressed, and the mist-containing gas is placed on the outer peripheral surface of the inner cylinder portion 18. It goes down while turning the gap 13a along. For this reason, while ensuring the residence time of the mist-containing gas sufficiently, the gas peripheral speed in the vicinity of the RSW core 22 can be increased to increase the turning force, so that the mist collides with the inner wall of the RSW core 22 and adheres. This facilitates the mist separation of the mist-containing gas.

  Furthermore, by providing the inner cylinder part 18 as in the present embodiment, the flow of the mist-containing gas that descends while turning is rapidly reversed and raised at the lower end of the inner cylinder part 18 to change the speed direction of the gas. And speed change can be changed suddenly. As described above, by rapidly changing the flow rate and direction of the mist-containing gas, acceleration is generated in the mist and the mist-containing gas can be easily separated from the flow of the mist-containing gas, so that the mist separation performance can be improved.

  Further, the inner cylinder portion 18 has an upper portion (top side) of the mist separation section 13 so as to surround a part of the RSE inlet pipe 14 so that the gas flowing in from the outlet 16a of the connection duct 16 collides with the outer peripheral surface thereof. ), The gas flowing in from the outflow port 16a bypasses the RSE inlet pipe 14 and turns in the gap portion 13a along the outer peripheral surface of the inner cylinder portion 18. For this reason, when a plurality of RSE inlet pipes 14 are provided, it is possible to prevent the mist-containing gas swirling through the connection duct 16 from being obstructed by the RSE inlet pipes 14, and thus the mist-containing gas. The residence time of the mist-containing gas in the mist separation section 13 can be ensured without reducing the swirl force.

  Moreover, the MS built-in type RSW 10 of the present embodiment has an integrated configuration that is installed between the precleaning chamber 11 and the venturi scrubber 17 so that the mist separation section 13 surrounds the RSE inlet pipe 14. To do. For this reason, compared with the MS independent RSW 60 shown in FIG. 7, the installation space can be reduced, the production weight can be reduced and the foundation construction cost can be reduced, which is advantageous in terms of the installation space and the equipment cost.

  In this way, the MS built-in type RSW 10 according to the present embodiment is a low-cost cleaning dust collection facility that is excellent in mist separation performance and can save space as a cleaning dust collection facility for blast furnace gas and the like.

  As Example 1 of the present invention, a conventional MS built-in type RSW 50 shown in FIG. 6, an MS independent type RSW 60 shown in FIG. 7, and an MS built-in type RSW 10 according to an embodiment of the present invention shown in FIG. The mist separation performance (mist collection rate) was quantitatively compared and evaluated using airflow analysis software.

At that time, the simulation was performed under the conditions of a gas flow rate of 500,000 Nm ³ / h, a gas inlet pressure of 240 kPa, a gas inlet temperature of 51 ° C., a mist particle size of 55 μm, and a mist amount of 25 t / h.

  As a result of the analysis, the mist collection rate was 25% in the conventional MSW-type RSW50 and 46% in the MS-independent RSW60, whereas in the MS-type RSW10 according to one embodiment of the present invention, It was 63%, and an excellent mist collection rate about 2.5 times that of the conventional MSRS RSW50 was obtained. Thereby, the effectiveness of the cleaning dust collection equipment of the present invention could be confirmed.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

10 Mist separator built-in cleaning dust collection equipment (cleaning dust collection equipment)
11 Pre-cleaning room 12 Ring split element section (RSE section)
13 Mist separation section (mist separator)
14 RSE inlet pipe (gas introduction pipe)
15 Ring Split Element (RSE)
16 Connection duct 16a Outlet (introduction part)
16b Inflow port 17 Venturi scrubber 18 Inner tube portion 18a Inner hollow portion 19 Outlet duct 20 Drainage receptacle 21 Partition plate 22 RSW iron skin

Claims (4)

A cleaning dust collection facility that removes dust contained in gas discharged from the furnace body,
A precleaning chamber for precleaning the gas;
A venturi scrubber that is connected to the preliminary cleaning chamber via a gas introduction pipe that introduces the gas preliminarily cleaned in the preliminary cleaning chamber, and changes the flow rate of the introduced gas;
A mist separator installed between the preliminary cleaning chamber and the venturi scrubber to separate mist from the gas that has passed through the venturi scrubber;
A connection duct for guiding the gas that has passed through the venturi scrubber to the top side of the mist separator;
An outlet duct for discharging the gas separated from the mist by the mist separator to the outside of the mist separator;
A substantially cylindrical inner cylinder portion provided in the mist separator so as to surround a part of the gas introduction pipe, and having the top side of the inner hollow portion directed to the outlet duct,
The mist separator causes the gas flowing in from the connection duct to flow down while swirling along the outer peripheral surface of the inner cylinder part, and when the gas that has flowed down reaches the lower end part of the inner cylinder part, the gas is supplied to the mist separator. A cleaning and dust collection facility, wherein the dust collecting equipment is inverted and raised so as to pass through the inner hollow portion of the inner cylinder portion and flows out from the outlet duct.   The preliminary cleaning chamber is provided on the top side of the cleaning dust collection facility, the venturi scrubber is provided on the bottom side of the cleaning dust collection facility, and the mist separator surrounds the gas introduction pipe. The cleaning dust collection equipment according to claim 1, wherein the cleaning dust collection equipment is installed between a chamber and the venturi scrubber. The mist separator has a substantially cylindrical shape,
The inner cylinder portion has a length equal to or greater than the diameter of the introduction portion of the connection duct to the mist separator, and the introduction portion causes the gas that has passed through the venturi scrubber to flow between the inner peripheral surface of the mist separator and the inner surface. The cleaning dust collection equipment according to claim 1, wherein the cleaning dust collection equipment is caused to flow into a gap portion between the outer peripheral surface of the cylinder portion.   The cleaning dust collection equipment according to claim 3, wherein the introduction unit allows the gas that has passed through the venturi scrubber to flow in from a tangential direction of the inner peripheral surface of the mist separator.

Images