Extraction apparatus and extraction method

Abstract

To provide an extraction apparatus and an extraction method, capable of reducing a load on a dust collector while increasing an extraction rate.SOLUTION: An extraction apparatus includes: an extraction pipe configured to extract, as an extraction gas, a part of exhaust gas discharged from a kiln that calcines a clinker material; a supply part configured to supply a cooling gas to the extraction gas extracted through the extraction pipe; and a chamber configured to separate coarse powder contained in dust accompanying the extraction gas, from the extraction gas cooled to a temperature lower than a melting point of potassium chloride by the cooling gas. The chamber includes: a housing provided with an inlet part into which the extraction gas flows and an outlet part from which the extraction gas is discharged; and at least one baffle member detachably attached to the housing between the inlet part and the outlet part, so as to prevent a flow of the extraction gas from the inlet part toward the outlet part.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to an air bleed device and an air bleed method. [Background technology]

[0002] Clinker plants burn a thermal energy source in a kiln to burn clinker material to produce cement clinker. In recent years, the amount of waste material used as a thermal energy source and clinker material has increased, resulting in an increase in volatile components such as chlorine, particularly in the kiln. These volatile components circulate within the clinker plant, entrained in the combustion gases generated by the kiln combustion, and can gradually become concentrated. The concentrated components can take on a paste-like form and adhere to the inside of the clinker calciner. Such deposits, sometimes called coatings, can impede the flow of raw materials and gases if they grow within the kiln. Patent Document 1 therefore discloses a chlorine bypass system that extracts a portion of the exhaust gas from the kiln to reduce the concentration of volatile components circulating within the clinker plant (system). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-160965 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in recent years, the amount of waste used has been increasing, and increasing the extraction rate through the chlorine bypass facility has resulted in an increase in the amount of dust entrained in the extracted gas. This dust is collected by a dust collector downstream, but the dust collector's upper limit on the amount of dust it can collect places a limit on how much the extraction rate can be increased.

[0005] Therefore, the present disclosure describes an air extraction device and an air extraction method that can increase the air extraction rate while reducing the load on the dust collector. [Means for solving the problem]

[0006] An example of a gas bleeding device includes an air bleeding pipe configured to bleed, as a bleeding gas, a portion of exhaust gas discharged from a kiln that burns clinker material, a supply unit configured to supply a cooling gas to the bleeding gas bled through the air bleeding pipe, and a chamber configured to separate coarse particles contained in dust accompanying the bleeding gas from the bleeding gas cooled by the cooling gas to a temperature below the melting point of potassium chloride. The chamber includes a housing provided with an inlet portion through which the bleeding gas flows and an outlet portion through which the bleeding gas is discharged, and at least one baffle member detachably attached to the housing between the inlet portion and the outlet portion so as to obstruct the flow of the bleeding gas from the inlet portion toward the outlet portion. [Effects of the Invention]

[0007] According to the air extraction device and air extraction method of the present disclosure, it is possible to increase the air extraction rate while reducing the load on the dust collector. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram schematically illustrating an example of a clinker production facility. [Figure 2] FIG. 2(a) is a cross-sectional view of an example (first example) of the chamber as viewed from the side, and FIG. 2(b) is a cross-sectional view taken along line BB in FIG. 2(a). [Figure 3] FIG. 3(a) is a cross-sectional view of another example (second example) of the chamber as seen from the side, and FIG. 3(b) is a cross-sectional view taken along line BB in FIG. 3(a). [Figure 4] FIG. 4(a) is a cross-sectional view of another example (third example) of the chamber as seen from the side, and FIG. 4(b) is a cross-sectional view taken along line BB in FIG. 4(a). [Figure 5]FIG. 5(a) is a cross-sectional side view of another example (fourth example) of the chamber, and FIG. 5(b) is a cross-sectional view taken along line BB in FIG. 5(a). [Figure 6] FIG. 6(a) is a cross-sectional side view of another example (fifth example) of the chamber, and FIG. 6(b) is a cross-sectional view taken along line BB in FIG. 6(a). [Figure 7] FIG. 7(a) is a cross-sectional side view of another example (sixth example) of the chamber, and FIG. 7(b) is a cross-sectional view taken along line BB in FIG. 7(a). [Figure 8] FIG. 8(a) is a cross-sectional view of another example (seventh example) of the chamber as viewed from the side, and FIG. 8(b) is a cross-sectional view taken along line BB in FIG. 8(a). [Figure 9] FIG. 9(a) is a cross-sectional view of another example (eighth example) of the chamber as viewed from the inlet side, and FIG. 9(b) is a cross-sectional view of another example (ninth example) of the chamber as viewed from the inlet side. DETAILED DESCRIPTION OF THE INVENTION

[0009] In the following description, the same elements or elements having the same functions will be designated by the same reference numerals, and redundant explanations will be omitted. Note that in this specification, when referring to the top, bottom, right, and left of a drawing, the directions of the reference numerals in the drawing will be used as the reference.

[0010] [Clinker manufacturing facility] First, the configuration of a clinker production facility 1 will be described with reference to Fig. 1. The clinker production facility 1 is an apparatus for producing cement clinker from clinker material. As illustrated in Fig. 1, the clinker production facility 1 includes a preheating section 10, a kiln 20 (a firing furnace), a cooling section 30 (a bleed device), a chamber 40 (a bleed device), a cooling tower 50, a dust collector 60, and a blower 70.

[0011] The preheating section 10 is a device that preheats clinker material in order to increase the efficiency of burning raw materials in the kiln 20. The preheating section 10 may be, for example, an SP (suspension preheater). The SP includes multiple stages (for example, about four to five stages) of cyclones. The clinker material fed into the cyclone located at the top of the SP moves downward while passing through each stage of cyclones in sequence. The preheating section 10 may be, for example, an NSP (new suspension preheater). The NSP is an SP with a calciner added.

[0012] The kiln 20 is configured to produce cement clinker by firing the clinker material preheated by the preheating section 10 at a high temperature. The kiln 20 may be, for example, a rotary kiln extending horizontally. The kiln end 21 of the kiln 20 is connected to the rising duct 11 of the preheating section 10. In the kiln 20, the preheated cement raw material is heated to, for example, about 1450°C. Exhaust gas G1 generated inside the kiln 20 by firing is introduced into the preheating section 10 through the rising duct 11. The temperature of the exhaust gas G1 when introduced into the preheating section 10 is, for example, about 900°C to 1250°C.

[0013] The cooling section 30 includes an extraction pipe 31 and a blower 32 (supply section). One end of the extraction pipe 31 is connected to the rising duct 11, as illustrated in FIG. 1. Although not shown, the extraction pipe 31 may be connected to the kiln bottom 21. The extraction pipe 31 is configured to extract (bleed) a portion of the exhaust gas G1 from the kiln 20 as extracted gas G2. The other end of the extraction pipe 31 is connected to the chamber 40.

[0014] The blower 32 is configured to supply cooling gas to the extraction pipe 31 to cool the extraction gas G2 flowing through the extraction pipe 31. When the extraction gas G2 is cooled by the cooling gas supplied from the blower 32, the extraction gas G2 is cooled to a temperature below the melting point of potassium chloride (776°C). The cooling gas may be air at room temperature (for example, approximately 20°C to 30°C) or may contain exhaust gas generated in a factory or the like. The extraction gas G2 is accompanied by dust such as raw material dust and clinker dust. Here, raw material dust refers to dust-like clinker material. Clinker dust includes fine powder and coarse powder. Fine powder refers to minute dust with a relatively high chlorine concentration. Coarse powder refers to large-diameter dust (for example, 1 mm or more) with a relatively low chlorine concentration.

[0015] The chamber 40 is configured to separate coarse particles from the bleed gas G2 cooled to a temperature below the melting point of potassium chloride. The structure of the chamber 40 will be described later, but the coarse particles separated in the chamber 40 fall to the bottom of the chamber 40 and are collected. The collected coarse particles may be returned to the rising duct 11, the kiln butt 21, or the like, for example.

[0016] The cooling tower 50 is configured to cool the extracted gas G2 from which the coarse particles have been separated in the chamber 40. The cooling tower 50 is, for example, a heat exchanger, and may be configured to cool the extracted gas G2 to approximately room temperature (for example, approximately 20°C to 30°C) by heat exchange with a refrigerant. The refrigerant may be, for example, a cooling gas (such as air) or a cooling liquid (such as water). The cooling tower 50 may be configured with a long pipe, and the extracted gas G2 may be cooled naturally by heat exchange with outside air while flowing through the pipe.

[0017] The dust collector 60 is configured to collect particles contained in the bleed gas G2 introduced from the cooling tower 50. The particles may include, for example, raw dust, fine powder, and composite particles in which fine powder adheres to raw dust. The particles collected by the dust collector 60 are collected in a dust tank (not shown). The dust collector 60 may be, for example, a bag filter, an electrostatic precipitator, or the like.

[0018] The blower 70 is configured to suck gas from the upstream side of the blower 70 and extract the extracted gas G2 from the rising duct 11 through the extraction pipe 31. The blower 70 may be, for example, a suction blower of a sirocco type or a turbo type.

[0019] [Chamber configuration] Next, the configuration of one example (first example) of the chamber 40 will be described with reference to Fig. 2. The chamber 40 includes a housing 41 and a baffle member 42.

[0020] The housing 41 includes an upper portion having a cylindrical shape (for example, a rectangular cylindrical shape) and a lower portion having a frustum shape (for example, a rectangular truncated pyramid shape) that narrows downward. An inlet portion 41a is provided on one side wall of the housing 41. The other end of the air bleed pipe 31 is connected to the inlet portion 41a. That is, the bleed gas G2 flows into the housing 41 through the inlet portion 41a. The other end of the air bleed pipe 31 may be connected to the housing 41 so as to extend obliquely upward, as illustrated in FIG. 2, or may be connected to the housing 41 so as to extend horizontally.

[0021] An outlet 41b is provided in the other side wall of the casing 41 that faces the one side wall. One end of a pipe connecting the chamber 40 and the cooling tower 50 is connected to the outlet 41b. That is, the extracted gas G2 is discharged from the casing 41 through the outlet 41b. Note that, as illustrated in FIG. 2, one end of the pipe may be connected to the casing 41 so as to extend horizontally.

[0022] The baffle member 42 is disposed in the housing 41 between the inlet portion 41a and the outlet portion 41b so as to obstruct the flow of the bleed gas G2 from the inlet portion 41a toward the outlet portion 41b. In the example of Fig. 2, the baffle member 42 has a plate shape (for example, a flat plate shape) and extends downward from the upper wall of the housing 41. The upper end of the baffle member 42 may be in contact with the upper wall of the housing 41 or may be spaced apart from the upper wall of the housing 41. In other words, the baffle member 42 may extend downward from the upper portion of the housing 41.

[0023] 2, the height of the bottom end of the baffle member 42 is located slightly higher than the height of the bottom of the outlet portion 41b when viewed from the opposing direction between the inlet portion 41a and the outlet portion 41b (hereinafter simply referred to as the "opposing direction"). Therefore, when viewed from the opposing direction, the baffle member 42 overlaps with almost the entire outlet portion 41b. Note that the height of the bottom end of the baffle member 42 may be located higher than the height of the bottom of the outlet portion 41b.

[0024] In the example of Fig. 2, the baffle member 42 extends across the entire width direction of the casing 41 (hereinafter simply referred to as the "width direction"), which is a direction intersecting the opposing direction. Therefore, when a portion of the exhaust gas G1 discharged from the kiln 20 is extracted as the extracted gas G2 through the extraction pipe 31, the extracted gas G2 is cooled by the cooling gas from the blower 32 to a temperature below the melting point of potassium chloride, and then flows around the lower end of the baffle member 42 without going around the side ends of the baffle member 42, and flows from the inlet portion 41a to the outlet portion 41b. Note that at least one side end of the baffle member 42 may be in contact with the side wall of the casing 41 or may be spaced apart from the side wall of the casing 41.

[0025] The baffle member 42 is detachably attached to the housing 41. The baffle member 42 may be removable and insertable in the width direction relative to the housing 41, or may be removable and insertable in the up-down direction relative to the housing 41. The baffle member 42 may be removable and insertable in and out of the housing 41 partially or entirely.

[0026] [Effect] According to the above example, when the detachable baffle member 42 is attached to the housing 41, the bleed gas G2 flowing from the inlet 41a toward the outlet 41b collides with the baffle member 42. As a result, coarse particles contained in the dust accompanying the bleed gas G2 fall downward from the housing 41. Therefore, even if the extraction rate is increased, the amount of dust heading toward the dust collector 60 located downstream of the chamber 40 is reduced. As a result, it is possible to increase the extraction rate while reducing the load on the dust collector 60. On the other hand, when a part or all of the detachable baffle member 42 is detached from the housing 41, the bleed gas G2 flows directly from the inlet 41a toward the outlet 41b. Therefore, if the dust collector 60 located downstream of the chamber 40 has a sufficient capacity to collect dust, the dust is collected by the dust collector 60, which has a higher dust collection performance than the chamber 40. Therefore, by removing part or all of the baffle members 42 from the housing 41 depending on the remaining dust collection capacity of the dust collector 60, it becomes possible for the clinker manufacturing equipment 1 as a whole to efficiently collect dust.

[0027] According to the above example, the baffle member 42 may be plate-shaped. In this case, the flow of the extracted gas G2 that has flowed into the housing 41 from the inlet portion 41a is more likely to be obstructed by the baffle member 42. Therefore, it is possible to further reduce the load on the dust collector 60 while increasing the extraction rate.

[0028] [Variations] The disclosure in this specification should be considered to be illustrative in all respects and not restrictive. Various omissions, substitutions, modifications, etc. may be made to the above examples without departing from the scope and spirit of the claims.

[0029] (1) As in another example (second example) of chamber 40 illustrated in Fig. 3, the length in the vertical direction of plate-shaped baffle member 42 may be shorter than that of the first example. That is, the height of the bottom end of baffle member 42 may be located higher than the height of the top end of outlet portion 41b.

[0030] (2) As in another example (third example) of the chamber 40 illustrated in FIG. 4, a plurality of through holes H may be provided in a plate-shaped baffle member 42.

[0031] (3) As in another example (fourth example) of the chamber 40 illustrated in FIG. 5, the chamber 40 may include a plurality of baffle members 42. The plurality of baffle members 42 may be rod-shaped (e.g., cylindrical). The plurality of baffle members 42 may be lined up from the top of the housing 41 downward. Each of the plurality of baffle members 42 may extend in the width direction. At least one side end of each baffle member 42 may be in contact with a side wall of the housing 41 or may be spaced apart from the side wall of the housing 41.

[0032] 5, the plurality of baffle members 42 may include a plurality of baffle members 42a (first plurality of baffle members) arranged downward from the top of the housing 41 on the inlet portion 41a side, and a plurality of baffle members 42b (second plurality of baffle members) arranged downward from the top of the housing 41 on the outlet portion 41b side. That is, the plurality of baffle members 42a and the plurality of baffle members 42b may be arranged in the opposing direction. As illustrated in FIG. 5, each baffle member 42a constituting the plurality of baffle members 42a may be located between adjacent baffle members 42b among the plurality of baffle members 42b when viewed from the opposing direction.

[0033] In the fourth example, the plurality of baffle members 42a and the plurality of baffle members 42b are arranged in a staggered pattern when viewed in the width direction. Therefore, the flow of the extracted gas G2 that flows into the housing 41 from the inlet 41a is more likely to be obstructed by the baffle members 42. This makes it possible to increase the extraction rate while further reducing the load on the dust collector 60. Note that when the chamber 40 includes a plurality of baffle members 42, the number of baffle members 42 that are attached to and detached from the housing 41 may be determined appropriately.

[0034] (4) As in another example (fifth example) of chamber 40 illustrated in Fig. 6, the plurality of baffle members 42 may be plate-shaped. Note that the plurality of plate-shaped baffle members 42 may be attached to housing 41 at an angle so as to form a predetermined elevation angle in the opposing direction.

[0035] (5) As in another example (sixth example) of chamber 40 illustrated in Fig. 7, the multiple baffle members 42 may extend downward from the upper wall of housing 41. The multiple baffle members 42 may include multiple baffle members 42a aligned in the width direction on the inlet 41a side and multiple baffle members 42b aligned in the width direction on the outlet 41b side. As illustrated in Fig. 7, each baffle member 42a constituting the multiple baffle members 42a may be located between adjacent baffle members 42b among the multiple baffle members 42b when viewed from the opposing direction.

[0036] (6) As in another example (seventh example) of the chamber 40 illustrated in FIG. 8, the chamber 40 may include multiple baffle members 42 of different shapes. In the example of FIG. 8, the multiple baffle members 42 include a plate-shaped baffle member 42c and multiple rod-shaped baffle members 42d. However, the shapes of the baffle members 42 and the number of baffle members 42 of each shape are not particularly limited. In the example of FIG. 8, multiple rod-shaped baffle members 42d are lined up in a row in the vertical direction below the plate-shaped baffle member 42c. However, the order and positions of these members are not particularly limited.

[0037] (7) As in other examples (eighth and ninth examples) of the chamber 40 illustrated in FIG. 9 , the chamber 40 may further include a drive unit 80 configured to move the baffle member 42 in and out of the housing 41. The drive unit 80 may be, for example, an electric cylinder or a hydraulic cylinder. In the example of FIG. 9(a) (eighth example), the chamber 40 includes one baffle member 42, and therefore one drive unit 80 is connected to the baffle member 42. In the example of FIG. 9(b) (ninth example), the chamber 40 includes multiple baffle members 42, and therefore one drive unit 80 is connected to each baffle member 42. Therefore, the insertion and removal of the baffle members 42 in and out of the housing 41 can be controlled for each baffle member 42. However, in the example of FIG. 9(b) (ninth example), one drive unit 80 may be connected to all the baffle members 42, and the insertion and removal of all the baffle members 42 may be controlled simultaneously by the single drive unit 80. Alternatively, some of the multiple baffle members 42 may be connected to one drive unit 80, and other of the multiple baffle members 42 may be connected to another drive unit 80. In the eighth and ninth examples, for example, by controlling the drive unit 80 with a control unit, it becomes possible to automatically insert and remove the baffle members 42 into and from the housing 41, rather than manually. Therefore, it becomes possible to automate the attachment and detachment of the baffle members 42 to and from the housing 41.

[0038] (8) The housing 41 may include a plurality of outlets 41b. In this case, the presence of the baffle member 42 reduces the temperature difference between the extracted gas G2 discharged from each outlet 41b.

[0039] [Other examples] Example 1. One example of a gas extraction device includes an extraction pipe configured to extract, as extraction gas, a portion of exhaust gas discharged from a kiln that burns clinker material; a supply unit configured to supply cooling gas to the extraction gas extracted through the extraction pipe; and a chamber configured to separate coarse particles contained in dust accompanying the extraction gas from the extraction gas cooled by the cooling gas to a temperature below the melting point of potassium chloride. The chamber includes a housing having an inlet through which the extraction gas flows and an outlet through which the extraction gas is discharged, and at least one baffle member detachably attached to the housing between the inlet and the outlet so as to obstruct the flow of the extraction gas from the inlet to the outlet. In this case, when the at least one detachable baffle member is attached to the housing, the extraction gas flowing from the inlet to the outlet collides with the at least one baffle member. As a result, the coarse particles contained in the dust accompanying the extraction gas fall downward from the housing. Therefore, even if the extraction rate is increased, the amount of dust heading toward the dust collector located downstream of the chamber is reduced. As a result, it is possible to increase the extraction rate while reducing the load on the dust collector. On the other hand, when at least one removable baffle member is partially or completely removed from the housing, the bleed gas flows directly from the inlet to the outlet. Therefore, if the dust collector located downstream of the chamber has a surplus capacity to capture dust, the dust collector, which has a higher dust capture performance than the chamber, captures the dust. Therefore, by removing at least one baffle member partially or completely from the housing depending on the surplus capacity of the dust collector, it is possible to efficiently capture dust throughout the entire air extraction device.

[0040] Example 2: In the device of Example 1, at least one baffle member may include a rod-shaped baffle member, a plate-shaped baffle member, or a plate-shaped baffle member with through holes. If the baffle member has any of these shapes, the flow of the bleed gas that has flowed into the housing from the inlet port is more likely to be obstructed by the baffle member. This makes it possible to increase the bleed rate while further reducing the load on the dust collector.

[0041] Example 3 In the device of Example 1 or Example 2, at least one baffle member may include a baffle member extending downward from the upper part of the housing. In this case, the same effects as those of the device of Example 2 can be obtained.

[0042] Example 4: In the device of either Example 1 or Example 2, at least one baffle member may include a plurality of baffle members extending in a direction intersecting the opposing direction of the inlet and outlet and aligned downward from the top of the housing. In this case, the same effects as those of the device of Example 2 can be obtained.

[0043] Example 5: In any of the devices of Examples 1 to 4, the at least one baffle member may include a first plurality of baffle members aligned downward from the top of the housing and a second plurality of baffle members aligned downward from the top of the housing. The first plurality of baffle members and the second plurality of baffle members may be aligned in the opposing direction between the inlet and outlet. Each baffle member constituting the first plurality of baffle members may be located between adjacent baffle members of the second plurality of baffle members when viewed from the opposing direction. In this case, the first plurality of baffle members and the second plurality of baffle members are arranged in a staggered pattern when viewed from a direction intersecting the opposing direction. This makes it easier for the baffle members to obstruct the flow of bleed gas that has flowed into the housing from the inlet. This makes it possible to increase the bleed rate while further reducing the load on the dust collector.

[0044] Example 6: In the device of Example 1 or Example 2, at least one baffle member may include a plurality of baffle members extending in the vertical direction and arranged in a direction intersecting the opposing direction of the inlet and outlet. In this case, the same effects as those of the device of Example 2 can be obtained.

[0045] Example 7: In any of the devices of Examples 1 to 6, the height of the lowest part of at least one baffle member may be positioned at or above the height of the lowest part of the outlet portion. In this case, the same effects as those of the device of Example 2 can be obtained.

[0046] Example 8: The device of any one of Examples 1 to 7 may further include a drive unit configured to move at least one baffle member in and out of the housing. In this case, for example, by controlling the drive unit with a control unit, it becomes possible to automatically move at least one baffle member in and out of the housing without manual operation. Therefore, it becomes possible to automate the attachment and detachment of at least one baffle member to and from the housing.

[0047] Example 9. One example of a gas extraction method includes: extracting a portion of the exhaust gas discharged from a kiln that burns clinker material through an extraction pipe as extraction gas; supplying a cooling gas from a supply unit to the extraction gas extracted through the extraction pipe to cool it to a temperature below the melting point of potassium chloride; and introducing the extraction gas cooled by the cooling gas into a chamber to separate coarse particles contained in dust accompanying the extraction gas from the extraction gas. The chamber includes a housing having an inlet through which the extraction gas flows and an outlet through which the extraction gas is discharged, and at least one baffle member detachably attached to the housing between the inlet and the outlet so as to obstruct the flow of the extraction gas from the inlet to the outlet. In this case, the same effects as those of the device of Example 1 can be obtained. [Explanation of symbols]

[0048] 1...clinker manufacturing equipment, 20...kiln (firing furnace), 30...cooling section (air extraction device), 31...air extraction pipe, 32...blower (supply section), 40...chamber (air extraction device), 41...casing, 41a...inlet section, 41b...outlet section, 42...baffle member, 42a...plurality of baffle members (first plurality of baffle members), 42b...plurality of baffle members (second plurality of baffle members), 80...drive section, G1...exhaust gas, G2...bleed gas.

Claims

1. an extraction pipe configured to extract, as extraction gas, a portion of exhaust gas discharged from a calcination furnace that calcines the clinker material; a supply unit configured to supply a cooling gas to the bleed gas bled through the bleed pipe; a chamber configured to separate coarse particles contained in dust accompanying the bleed gas from the bleed gas cooled by the cooling gas to a temperature below the melting point of potassium chloride; The chamber comprises: a housing provided with an inlet portion through which the bleed gas flows and an outlet portion through which the bleed gas is discharged; at least one baffle member removably attached to the housing between the inlet and outlet portions so as to impede flow of the bleed gas from the inlet portion toward the outlet portion.

2. The device according to claim 1 , wherein the at least one baffle member comprises a rod-shaped baffle member, a plate-shaped baffle member, or a plate-shaped baffle member with through holes.

3. The apparatus of claim 1 , wherein the at least one baffle member includes a baffle member extending downward from a top portion of the housing.

4. The device according to claim 1 , wherein the at least one baffle member includes a plurality of baffle members extending in a direction intersecting the opposing direction of the inlet portion and the outlet portion and arranged downward from the top of the housing.

5. The at least one baffle member is a first plurality of baffle members arranged downward from the top of the housing; a second plurality of baffle members arranged downward from the top of the housing; the first plurality of baffle members and the second plurality of baffle members are aligned in a direction in which the inlet portion and the outlet portion face each other, 2. The apparatus of claim 1, wherein each baffle member of the first plurality of baffle members is located between adjacent baffle members of the second plurality of baffle members when viewed from the opposing direction.

6. The device according to claim 1 , wherein the at least one baffle member includes a plurality of baffle members extending in a vertical direction and arranged in a direction intersecting the opposing direction of the inlet portion and the outlet portion.

7. 2. The apparatus of claim 1, wherein a height of a bottom of the at least one baffle member is located above a height of a bottom of the outlet portion.

8. The apparatus of any one of claims 1 to 7, further comprising a drive configured to move the at least one baffle member in and out of the housing.

9. Bleeding a part of exhaust gas discharged from a calciner for calcining the clinker material through an extraction pipe as bleed gas; supplying a cooling gas from a supply unit to the extracted gas extracted through the extraction pipe to cool it to a temperature below the melting point of potassium chloride; introducing the bleed gas cooled by the cooling gas into a chamber, and separating coarse particles contained in dust accompanying the bleed gas from the bleed gas; The chamber comprises: a housing provided with an inlet portion through which the bleed gas flows and an outlet portion through which the bleed gas is discharged; at least one baffle member removably attached to the housing between the inlet and outlet portions so as to obstruct flow of the bleed gas from the inlet portion toward the outlet portion.

Images