JP2021160965A - Chamber, chlorine bypass facility, cement clinker production facility, and production method of cement clinker - Google Patents

Abstract

To provide a chamber capable of stabilizing operations of a chlorine bypass facility.SOLUTION: A chamber 20 comprises: a main body part 40 which is provided on a chlorine bypass in a cement clinker production facility, and causes a plurality of gases to merge. The chamber 20 comprises: a plurality of introduction holes 30A and 32A for introducing an extraction gas 60 extracted by an extraction pipe of the chlorine bypass or the extraction gas 60 and a coolant gas 61 to the main body part 40; and at least one derivation hole 34B for deriving the extraction gas 62 from the main body part 40. In the main body part 40, an obstacle 42 is arranged in a manner in which all virtual channels connecting the plurality of introduction holes 30A, 32A and the derivation holes 34B, are blocked.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to a chamber, a chlorine bypass facility, a cement clinker manufacturing facility, and a method for manufacturing a cement clinker.

A wide variety of waste is treated at the cement clinker manufacturing facility. In recent years, as the amount of waste treated has increased, the amount of volatile components such as chlorine and sulfur input to cement kilns has increased. These volatile components adhere to the inside of the manufacturing equipment and become a factor to generate coaching, which affects the operation of the cement clinker manufacturing equipment. For this reason, many cement clinker manufacturing facilities are equipped with chlorine bypass facilities to reduce volatile components.

When small kilns are installed adjacent to each other, it is more efficient to combine a plurality of kiln exhaust gases and treat them collectively rather than providing a chlorine bypass for each kiln. For example, Patent Document 1 proposes a gas merging device including a chamber for merging bleed air guided by a plurality of gas inlet ducts. In Patent Document 1, it is proposed to set the ratio of the distance between the gas inlet duct and the gas outlet duct to the inner diameter of the duct within a predetermined range.

Japanese Unexamined Patent Publication No. 2006-137644

In a chamber as in Patent Document 1, there is a concern that the introduced gases are not sufficiently mixed with each other and that a short-circuit flow from the inlet duct to the outlet duct occurs. When such a phenomenon occurs, if the chamber is designed to collect dust, there is a concern that the dust recovery rate will also decrease. In addition, the properties of the gas drawn out from the outlet duct fluctuate, making the operation of the chlorine bypass equipment unstable, and the heat resistance of the outlet duct is due to being drawn out from the outlet duct without mixing high-temperature gas. There is concern that it will be necessary.

Therefore, the present disclosure provides a chamber capable of stabilizing the operation of the chlorine bypass equipment. Further, by providing such a chamber, a chlorine bypass facility and a cement clinker manufacturing facility capable of stable operation are provided. Further, the present invention provides a method for producing cement clinker capable of stably producing cement clinker.

The chamber according to one aspect of the present disclosure is provided in a chlorine bypass in a cement clinker manufacturing facility and has a main body for merging a plurality of gases. This chamber has a plurality of inlets for introducing bleed gas extracted by a chlorine bypass bleed pipe, or a gas different from the bleed gas into the main body, and at least one guide for deriving the bleed gas from the main body. It has an exit. An obstacle is provided inside the main body so that a plurality of virtual flow paths connecting the plurality of inlets and outlets are blocked.

An obstacle is provided inside the main body of the chamber so that all of the virtual flow paths connecting the plurality of inlets and outlets are blocked. Therefore, it is possible to suppress a so-called short-circuit flow in which the respective gases introduced from the plurality of inlets are not mixed and are directly led out from the outlet. Then, since the gas introduced from the plurality of inlets collides with the obstacle, the plurality of bleed air gases or the bleed air gas and a gas different from the bleed air gas are mixed. In addition, dust can be sufficiently recovered. Therefore, it is possible to suppress fluctuations in the properties of the bleed gas due to factors such as short-circuit flow, poor mixing, and fluctuations in the dust recovery rate, and to stabilize the operation of the chlorine bypass equipment. However, the above-mentioned chamber is not limited to the one that collects dust.

The obstacle preferably includes at least one selected from the group consisting of a plate-shaped member, a columnar member, and a rotating member. As a result, the mixture of the bleed air gases or a gas different from the bleed air gas can be improved, and fluctuations in the properties of the bleed air gas can be further suppressed.

At least one of the plurality of inlets and outlets may be provided at the tip of the cylinder inserted inside the main body. Thereby, the position and the introduction direction of the gas inlet, or the position and the outlet direction of the gas outlet can be set with a high degree of freedom. Therefore, fluctuations in the properties of the bleed gas due to factors such as short-circuit flow, poor mixing, and fluctuations in the dust recovery rate can be further suppressed, and the operation of the chlorine bypass equipment can be further stabilized.

The chamber according to one aspect of the present disclosure is provided in a chlorine bypass in a cement clinker manufacturing facility and has a main body for merging a plurality of gases. This chamber has a plurality of inlets for introducing bleed gas extracted by a chlorine bypass bleed pipe, or a gas different from the bleed gas into the main body, and at least one guide for deriving the bleed gas from the main body. It has an exit. At least one of the inlet and the outlet is provided at the tip of the cylinder inserted inside the main body.

Inside the main body of the chamber, at least one of the plurality of inlets and outlets is provided at the tip of the cylinder into which the main body is inserted. In such a main body, the position and direction of the gas introduction port, or the position and direction of the gas outlet can be set with a high degree of freedom. As a result, the flow state of the gas in the main body can be adjusted so as to suppress a so-called short-circuit flow in which the plurality of introduced gases are not mixed with each other and are directly derived from the outlet. As a result, it is possible to prevent the bleed air gas or the bleed air gas and a gas different from the bleed air gas from being sufficiently mixed and being drawn out from the outlet. It is also possible to adjust the gas flow state so that the dust can be sufficiently recovered. Therefore, it is possible to suppress fluctuations in the properties of the bleed gas due to factors such as short-circuit flow, poor mixing, and fluctuations in the dust recovery rate, and to stabilize the operation of the chlorine bypass equipment. However, the above-mentioned chamber is not limited to the one that collects dust.

The introduction port is provided at the tip of a cylinder inserted inside the main body, and the outlet is arranged on the rear side of the introduction port with reference to the introduction direction of the gas introduced from the introduction port. It is preferable to have. As a result, the flow path of the gas in the main body becomes complicated and long, so that the bleed air gas or the bleed air gas and a gas different from the bleed air gas can be more sufficiently mixed. Therefore, the operation of the chlorine bypass equipment can be further stabilized.

The outlet is provided at the tip of a cylinder inserted inside the main body, and the introduction port is arranged on the front side of the outlet with reference to the direction in which the gas is derived from the outlet. It is preferable to have. As a result, the flow path of the gas in the main body becomes complicated and long, so that the bleed air gas or the bleed air gas and a gas different from the bleed air gas can be more sufficiently mixed. Therefore, the operation of the chlorine bypass equipment can be further stabilized.

It is preferable that the main body is connected to a dust discharge port for discharging dust contained in the bleed air. As a result, the load on the dust recovery equipment provided on the downstream side of the chamber can be reduced.

The gas different from the bleed gas is preferably a cooling gas. Normally, the temperatures and components of the bleed gas introduced from the inlet and the cooling gas are significantly different, but with this chamber, fluctuations in the temperature and components of the derived gas derived from the outlet are sufficiently suppressed. be able to.

The chlorine bypass equipment according to one aspect of the present disclosure comprises any of the chambers described above. As a result, the chlorine bypass can be operated stably. Further, since a plurality of bleed air gases can be introduced from the introduction port, the bleed air gas can be efficiently processed.

The cement clinker manufacturing facility according to one aspect of the present disclosure is the above-mentioned chlorine bypass facility having a preheating and calcined portion, a cement kiln, a rising duct, and an air extraction pipe connected to the rising duct and / or the kiln tail of the cement kiln. And. Since this cement clinker manufacturing facility is equipped with a chlorine bypass facility having any of the above chambers, it can be operated stably. Further, since the chlorine bypass equipment can introduce a plurality of bleed gas or a gas different from the bleed gas and the bleed gas from the inlet of the chamber, the bleed gas is treated stably and efficiently. be able to. Therefore, the cement clinker manufacturing apparatus can be operated stably, and the production efficiency of the cement clinker can be improved.

The method for producing a cement clinker according to one aspect of the present disclosure includes a preheating calcination step of preheating and calcining a cement raw material, and a calcination step of firing the preheated and calcined cement raw material to produce a cement clinker. It also has a recovery step of recovering at least a part of volatile components contained in the kiln exhaust gas generated in the firing step as dust by the above-mentioned chlorine bypass facility.

This manufacturing method includes a recovery step of recovering dust with the chlorine bypass equipment described above. Therefore, since the dust can be treated stably and efficiently, each process is stabilized, and the cement clinker can be produced stably and efficiently.

According to the present disclosure, it is possible to provide a chamber capable of stabilizing the operation of a chlorine bypass facility. Further, by providing such a chamber, it is possible to provide a chlorine bypass facility and a cement clinker manufacturing facility capable of stable operation. Further, it is possible to provide a method for producing cement clinker capable of stably producing cement clinker.

It is a figure which shows the outline of the chlorine bypass equipment which concerns on one Embodiment. It is a figure which shows the outline of the chlorine bypass equipment which concerns on another embodiment. It is a figure which shows an example of the chamber provided in the chlorine bypass equipment. It is a figure which shows the internal structure of the main body part when the chamber of FIG. 3 is seen from above. It is a figure which shows the modification of a chamber. It is a figure which shows the internal structure when the chamber of FIG. 5 is seen from above. It is a front view which shows the example of the obstacle provided in the main body part. It is a figure which shows another modification of a chamber. It is a figure which shows another modification of a chamber. It is a figure which shows another example of the chamber provided in the chlorine bypass equipment. It is a figure which shows still another example of the chamber provided in the chlorine bypass equipment. It is a figure which shows still another example of the chamber provided in the chlorine bypass equipment. It is a figure which shows the cement clinker manufacturing equipment which concerns on one Embodiment.

Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings as the case may be. However, the following embodiments are examples for explaining the present disclosure, and are not intended to limit the present disclosure to the following contents. In the description, the same reference numerals are used for the same elements or elements having the same function, and duplicate description may be omitted in some cases. In addition, the positional relationship such as up, down, left, and right shall be based on the positional relationship shown in the drawings unless otherwise specified. Further, the dimensional ratio of each element is not limited to the ratio shown in the figure.

FIG. 1 is a diagram showing an outline of a chlorine bypass facility according to an embodiment. The chlorine bypass facility 100 is provided in a cement clinker manufacturing facility 200 provided with a cement kiln 50, a kiln tail 52, and a rising duct 51, and extracts kiln exhaust gas containing volatile components such as chlorine generated during the production of the cement clinker to extract air. The volatile components such as chlorine contained in the gas are recovered as dust to reduce the volatile components in the cement clinker manufacturing facility.

The chlorine bypass facility 100 extracts the kiln exhaust gas from the kiln tail 52 of the rising duct 51 and / or the cement kiln 50, mixes the extracted kiln exhaust gas with the cooling gas, and obtains the extracted gas containing the kiln exhaust gas and the cooling gas. The air tube 12, the introduction fan 14 for supplying the cooling gas to the air extraction tube 12, the chamber 20 that mixes the air extraction gas and the cooling gas from the air extraction tube 12 and separates the massive dust, and the cooling gas in the chamber 20. An introduction fan 15 for introduction, a heat exchanger 25 that cools the bleed gas from which lumpy dust is separated to a temperature below the melting point of the volatile alkali salt, and dust (chlorine) contained in the bleed gas precipitated by the cooling. Bypass dust) is provided with a dust collector 26 that separates the extracted gas from the extracted gas, and a suction fan 28 that extracts the extracted gas via the chamber 20, the heat exchanger 25, and the dust collector 26. The bleed air tube 12 may be called an bleed air probe. Examples of the suction fan 28 include ordinary suction fans such as a sirocco fan and a turbo fan.

The introduction fan 14 supplies the cooling gas to the cooling gas introduction unit 10, and the cooling gas introduction unit 10 introduces the cooling gas into the bleeding pipe 12. The introduction fan 15 introduces the cooling gas into the chamber 20. The cooling gas may be air at room temperature and may include exhaust gas generated in a factory or the like. Examples of the exhaust gas include odorous gas generated during reception, storage and fermentation of hydrous sludge such as sewage sludge brought into a cement manufacturing plant, exhaust gas discharged from a suction fan 28 and a suction fan in another process, and the like. Be done.

In the chamber 20, the bleed gas and the cooling gas are mixed. The mixed gas (bleed gas) obtained in the chamber 20 sequentially flows through the heat exchanger 25 and the dust collector 26. The dust contained in the bleed gas is discharged from the dust discharge port of the chamber 20. The remaining dust contained in the bleed gas is collected by the dust collector 26. The dust collector 26 may be a bug filter or a wet dust collector such as a wet scrubber. Further, a classifier may be provided upstream or downstream of the dust collector 26 separately from the dust collector 26.

FIG. 2 is a diagram showing an outline of a chlorine bypass facility according to another embodiment. The cement clinker manufacturing facility 210 includes two cement kilns 50, a kiln tail 52 connected to the two cement kilns 50, and a rising duct 51. In the chlorine bypass facility 110 provided in the cement clinker manufacturing facility 210 of FIG. 2, bleed gas is introduced into the chamber 20A from two bleed pipes 12, respectively. That is, the chamber 20 of FIG. 1 is different in that the bleed gas and the cooling gas are introduced, whereas the chamber 20A of FIG. 2 is introduced with a plurality of bleed gas. In the chamber 20A, bleed gas obtained by bleeding the kiln exhaust gas generated from the two cement kilns 50 is introduced and mixed. The dust contained in the bleed gas is discharged from the dust discharge port of the chamber 20A.

When a plurality of bleeding pipes 12 are connected to one kiln tail 52 or a rising duct 51, bleed gas may be introduced into the chamber 20A from the plurality of bleeding pipes 12, respectively. Also in this case, a plurality of bleed air gases are mixed in the chamber 20A. In the modified example, a plurality of bleed gas and cooling gas may be introduced into the chamber, respectively, and a gas other than the bleed gas and cooling gas may be introduced into the chamber.

FIG. 3 is a diagram showing an example of a chamber provided in a chlorine bypass facility. The chamber 20 is connected to a main body 40 having an internal space for mixing gas, two introduction pipes 30 and 32 that are connected to the main body 40 and introduce gas into the main body 40, and a main body 40. It has a lead-out pipe 34 that draws out the gas mixed in 40 from the main body 40, and a dust discharge pipe 36 that is connected to the main body 40 and discharges dust separated from the bleed air gas.

Introduction ports 30A and 32A are formed at the connection portions between the main body 40 and the two introduction pipes 30 and 32, respectively, and the outlet 34B is formed at the connection portion between the main body 40 and the outlet pipe 34. .. A dust discharge port 36B is formed in the connection between the main body 40 and the dust discharge pipe 36. That is, the chamber 20 has an introduction port 30A, an introduction port 32A, an outlet port 34B, and a dust discharge port 36B in the main body 40. An obstacle 42 made of a plate-shaped member is provided inside the main body 40 of the chamber 20.

The bleed gas 60 that has flowed through the introduction pipes 30 and 32 and the cooling gas 61 that cools the bleed gas are introduced into the main body 40 from the introduction port 30A and the introduction port 32A, respectively. The bleed gas 60 and the cooling gas 61 introduced into the main body 40 merge and are mixed at the main body 40. The mixed bleed gas (mixed gas) is led out from the outlet 34B to the outlet pipe 34. The dust 65 contained in the bleed air 60 is discharged from the dust discharge port 36B by the dust discharge pipe 36.

FIG. 4 is a diagram showing the internal structure of the main body 40 when the chamber 20 is viewed from above. The obstacle 42 provided inside the main body 40 is provided so as to block both _{VL 0 connecting the introduction port 30A and the outlet 34B and VL 2} connecting the introduction port 32A and the outlet 34B. As a result, the phenomenon (short-circuit flow) in which the bleed gas 60 and the cooling gas 61 flowing in from the introduction port 30A and the introduction port 32A are not mixed with each other and are directly led out from the outlet 34B is suppressed, and the bleed gas 60 and the cooling gas are cooled. Mixing of gas 61 can be promoted. Therefore, it is possible to prevent the bleed air 60 and the cooling gas 61 from being led out from the outlet 34B without being sufficiently mixed. In addition, dust can be sufficiently recovered from the dust discharge pipe 36. As a result, the property fluctuation and the temperature fluctuation of the mixed gas 62 led out from the outlet 34B are suppressed, and the operation of the chlorine bypass equipment 100 and the cement clinker manufacturing equipment 200 can be stabilized.

In the modified example of FIG. 4, two bleed air 60s are introduced into the main body 40 of the chamber 20A from the introduction port 30A and the introduction port 32A, respectively, and merge at the main body 40. The properties and temperature of the two bleed gas 60s vary depending on the operating state of each cement kiln 50. Therefore, if the mixture is not sufficiently mixed, the properties and temperature of the outlet pipe 34 led out from the outlet 34B also fluctuate. However, in the chamber 20A, the bleed gas 60s can be sufficiently mixed with each other. Therefore, the property fluctuation and the temperature fluctuation of the bleed air 62 led out from the outlet 34B are suppressed, and the operation of the chlorine bypass equipment 110 and the cement clinker manufacturing equipment 210 can be stabilized.

The virtual flow path in the present disclosure includes an opening edge of an inlet for an bleed gas 60 or a cooling gas 61 and an opening edge of an outlet for a mixed gas 62 (bleed gas), which occupy a part of the internal space of the main body. It is a three-dimensional area that connects. When the opening edges of the inlet and outlet are circular with the same size, the virtual flow path has a cylindrical shape. When this virtual flow path is blocked, it means that the virtual flow path is interrupted and discontinuous due to an obstacle.

FIG. 5 is a diagram showing a modified example of the chamber. The chamber 20B is connected to a main body 40 having an internal space for mixing gas, three introduction pipes 30, 31, 32 that are connected to the main body 40 and introduce gas into the main body 40, and a main body 40. It has a lead-out pipe 34 for leading out the mixed gas from the main body 40. The chamber 20B of this example does not have a dust discharge pipe 36 for discharging dust. In this case, the dust may be collected, for example, by the dust collector 26 on the downstream side of the chamber 20B.

Introductory ports 30A, 31A, and 32A are formed at the connection portions between the main body 40 and the three introduction pipes 30, 31, 32, respectively, and the outlet 34B is formed at the connection portion between the main body 40 and the outlet pipe 34. It is formed. A plurality of plate-shaped obstacles 42A, 42B, 42C, 42D, 42E, and 42F are provided inside the main body 40 of the chamber 20B.

The bleed air 60 that has circulated through the introduction pipes 30 and 31 is introduced into the main body 40 from the introduction ports 30A and 31A. Further, the cooling gas 61 that has flowed through the introduction pipe 32 is introduced from the introduction port 32A. The two bleed gas 60 and the cooling gas 61 introduced into the main body 40 are mixed in the main body 40. The mixed gas 62 obtained by mixing the bleed air 60 and the cooling gas 61 is led out from the outlet 34B to the outlet pipe 34.

FIG. 6 is a diagram showing an internal structure when the chamber 20B of FIG. 5 is viewed from above. A plurality of obstacles 42A, 42B, 42C, 42D, 42E, 42F provided inside the main body 40 of the chamber 20B are VL ₀ connecting the introduction port 30A and the outlet 34B, and virtual connecting the introduction port 31A and the outlet 34B. Both the flow path VL _{1 and the VL 2} connecting the introduction port 32A and the outlet port 34B are provided so as to block. As a result, the phenomenon (short-circuit flow) in which the two bleed gas 60 and the cooling gas 61 that have flowed in from the introduction ports 30A, 31A, and 32A are not mixed with each other and are directly led out from the outlet 34B is suppressed, and the two are suppressed. Mixing of the bleed gas 60 and the cooling gas 61 can be promoted. Further, by having a plurality of obstacles 42A, 42B, 42C, 42D, 42E, 42F, gas branching and merging can be repeatedly performed in the chamber 20B. Therefore, the mixing of the bleed gas 60 and the cooling gas 61 can be promoted. Therefore, it is possible to prevent the two bleed gas 60 and the cooling gas 61 from being led out from the outlet 34B without being sufficiently mixed. As a result, the property fluctuation and the temperature fluctuation of the bleed air 62 led out from the outlet 34B are suppressed, and the operation of the chlorine bypass equipment and the cement clinker manufacturing equipment can be stabilized.

The shape, number, and arrangement position of obstacles provided inside the chamber 20B (20, 20A) are not particularly limited, and may be provided so as to block virtual lines connecting a plurality of introduction ports. In each of the above examples, there was only one outlet for deriving the mixed gas (bleed gas), but the present invention is not limited to this, and there are a plurality of outlets for the mixed gas (bleed gas). May be good. When there are a plurality of chlorine bypass facilities of the same scale, if there is a mixed gas in which the properties and temperature are mixed to the same level, the operation of each chlorine bypass facility can be performed stably. When a plurality of mixed gas outlets are provided, all virtual flow paths connecting the plurality of inlets and the plurality of outlets may be blocked by an obstacle. However, since the dust outlet is different from the gas outlet, it is excluded from the target.

FIG. 7 is a front view showing an example of an obstacle provided inside the main body 40. 7 (A) and 7 (B) are views when the obstacles 42G and 42H are viewed from the introduction port side, respectively. The obstacles 42G and 42H each have a quadrangular outer shape and have a plurality of through holes 43. The obstacles 42G and 42H made of such a perforated plate are arranged inside the main body 40 shown in FIGS. 3 and 4, for example. When the obstacles 42G and 42H are arranged in this order from the upstream side with reference to the flow direction of the bleed gas 60 (cooling gas 61), as shown in FIG. 7, the virtual flow paths VL ₀ and VL ₂ are the obstacles 42G. , 42H. That is, since the positions of the through holes 43 provided in the obstacles 42G and 42H are _{deviated from the virtual flow paths VL 0} and VL ₂ , the bleed gas 60 (cooling gas 61) passes through the through holes 43 without being mixed. This can suppress the short-circuit flow. As described above, since the obstacles 42G and 42H are provided with through holes 43 so as not to overlap with _{the virtual flow paths VL 0} and VL _{2, a short-circuit flow can be suppressed.}

In the example of FIG. 7, in both the obstacles 42G and 42H, the through holes 43 were _{arranged so as to deviate from the virtual flow paths VL 0} and VL ₂ , but in either of the obstacles 42G and 42H. , The through hole 43 may overlap with the _{virtual flow paths VL 0} and VL _2. Further, the shape of the through hole 43 is not particularly limited. In yet another example, a plate-shaped member with a part cut out may be used as an obstacle. In this case, an obstacle may be arranged so that the virtual flow paths VL ₀ and VL _{2 do not pass through the notched portion.}

FIG. 8 is a diagram showing another modification of the chamber. The chamber 20C of FIG. 8 has a propeller-shaped obstacle 42P having a rotary blade inside the main body 40. Other than this point, it has the same configuration as the chamber 20 (20A) shown in FIGS. 3 and 4. The obstacle 42P cuts off the virtual flow path by rotating the wing. At this time, the circumscribed circle at the tip of the rotary blade may block the virtual flow path. The obstacle 42P composed of such a rotating member can further promote mixing by the stirring action of the gas while suppressing the short-circuit flow of the bleed gas (cooling gas). Further, since the size of the obstacle can be reduced, the pressure loss in the main body 40 can also be reduced. The power of the suction fan 28 may be used for the rotation of the obstacle 42P. This eliminates the need to provide a separate power source.

FIG. 9 is a diagram showing another modification of the chamber. The chamber 20D is connected to a main body 40 having an internal space for mixing gas, three introduction pipes 30, 32, 33 that are connected to the main body 40 and introduce gas into the main body 40, and a main body 40. It has a lead-out pipe 34 for drawing out the mixed gas (bleed air gas) mixed from the main body 40. The chamber 20D of this example does not have a dust discharge pipe for discharging dust. In this case, the dust may be collected, for example, by the dust collector 26 on the downstream side of the chamber 20D.

Introductory ports 30A, 32A, 33A are formed at the connection portions between the main body 40 and the three introduction pipes 30, 32, 33, respectively, and the outlet 34B is formed at the connection portion between the main body 40 and the outlet pipe 34. It is formed. A plurality of columnar obstacles 44A, 44B, 44C, 44D, 44E, 44F are provided inside the main body 40 of the chamber 20D.

The bleed air 60 that has circulated through the introduction pipes 30 and 32 is introduced into the main body 40 from the introduction ports 30A and 32A. Further, the cooling gas 61 that has flowed through the introduction pipe 33 is introduced from the introduction port 33A. The two bleed gas 60 and the cooling gas 61 introduced into the main body 40 are merged and mixed at the main body 40. The bleed gas 62 obtained by mixing the bleed gas 60 and the cooling gas 61 is led out from the outlet 34B to the outlet pipe 34. The dust contained in the bleed air 60 may be discharged from the outlet 34B together with the mixed gas 62 by the outlet pipe 34.

The plurality of columnar obstacles 44A, 44B, 44C, 44D, 44E, 44F of the chamber 20D are arranged so as to be different from each other in the longitudinal direction without being arranged. Therefore, the introduction direction of the gas introduced from the introduction port can be selected with a high degree of freedom. By having the plurality of obstacles 44A, 44B, 44C, 44D, 44E, 44F in the chamber 20D, gas branching and merging can be repeatedly performed in the chamber 20D. Therefore, the mixing of the bleed gas 60 and the cooling gas 61 can be promoted. The shape of the obstacles 44A, 44B, 44C, 44D, 44E, 44F is not limited to a columnar shape, and may be a columnar member such as a prismatic shape, and a plurality of shapes different from each other may be combined. Further, the arrangement of the plurality of columnar obstacles is not limited to the example of FIG. 9, and for example, the plurality of columnar obstacles may be arranged side by side so that the plurality of longitudinal directions are along the vertical direction. Further, the sizes and shapes of the plurality of columnar obstacles may be the same or different from each other.

FIG. 10 is a diagram showing another example of a chamber provided in a chlorine bypass facility. The chamber 20E is connected to a main body 40 having an internal space for mixing gas, two introduction pipes 37 and 38 that are connected to the main body 40 and introduce gas into the main body 40, and a main body 40. It has a lead-out pipe 39 that draws out the gas mixed from 40, and a dust discharge pipe 36 that is connected to the main body 40 and discharges dust separated from the bleed air gas.

The two introduction pipes 37 and 38 have cylinders 37G and 38G inserted inside the main body 40. Introductory ports 37A and 38A are provided at the tips of the cylinders 37G and 38G. A lead-out port 39B is formed at the connection portion between the main body portion 40 and the lead-out pipe 39. A dust discharge port 36B is formed at the connection portion between the main body portion 40 and the dust discharge pipe 36. That is, the chamber 20E has the introduction ports 37A and 38A, the outlet port 39B, and the dust discharge port 36B in the main body 40. The chamber 20E may have an obstacle inside the main body 40.

The bleed gas 60 that has flowed through 37 and 38 and the cooling gas 61 that cools the bleed gas are introduced into the main body 40 from the introduction ports 37A and 38A. The bleed gas 60 and the cooling gas 61 introduced into the main body 40 are merged and mixed at the main body 40. The mixed bleed air 62 is led out from the outlet 39B to the outlet pipe 39. The dust 65 contained in the bleed air 60 is discharged from the dust discharge port 36B by the dust discharge pipe 36.

In the chamber 20E, the introduction ports 37A and 38A are provided at the tip portions of the tubular bodies 37G and 38G inserted inside the main body portion 40. Based on the introduction directions d1 and d2 of the bleed gas 60 and the cooling gas 61 introduced from the introduction ports 37A and the introduction ports 38A at the tips of the cylinders 37G and 38G, respectively, the outlet ports 39B are the introduction ports 37A and 38A. It is located on the rear side of. The bleed gas 60 and the cooling gas 61 introduced from the introduction ports 37A and 38A are mixed while flowing in the main body 40 along the directions of arrows F1 and F2, for example.

In the main body 40, the flow paths of the bleed gas 60 and the cooling gas 61 become complicated and long, so that the bleed gas 60 and the cooling gas 61 can be sufficiently mixed. Therefore, it is possible to suppress a so-called short-circuit flow in which the gases are not mixed with each other and are directly derived from the outlet 39B. As a result, it is possible to prevent the bleed air 60 and the cooling gas 61 from being led out from the outlet 39B without being sufficiently mixed. In addition, dust can be sufficiently recovered from the dust discharge port 36B. As a result, the property fluctuation and the temperature fluctuation of the mixed gas 62 led out from the outlet 39B are suppressed, and the operation of the chlorine bypass equipment and the cement clinker manufacturing equipment can be stabilized.

The "rear side" in the present disclosure includes not only directly behind but also diagonally behind. That is, it may be behind the virtual surface orthogonal to the gas introduction direction into the internal space of the main body at the introduction port. As a result, the gas introduced from the introduction port needs to change its direction at an angle of 90 ° or more before being taken out from the outlet, so that the gas is sufficiently mixed in the main body 40.

Two bleed gas 60s may be introduced into the main body 40 of the chamber 20E from the introduction ports 37A and 38A, respectively. The properties and temperature of the two bleed gas 60s vary depending on the operating state of each cement kiln 50. Therefore, if the mixture is not sufficiently mixed, the properties and temperature of the bleed air 62 derived from the outlet 39B also fluctuate. However, in the chamber 20E, the bleed gas 60s can be sufficiently mixed with each other. Therefore, the property fluctuation and the temperature fluctuation of the bleed air 62 led out from the outlet 39B are suppressed, and the operation of the chlorine bypass equipment 110 and the cement clinker manufacturing equipment 210 can be stabilized. Further, the gases introduced from the introduction ports 37A and 38A can be sufficiently mixed without providing an obstacle in the main body 40. Therefore, the size of the chamber can be reduced. However, it does not exclude those having obstacles in the main body 40.

FIG. 11 is a diagram showing still another example of the chamber provided in the chlorine bypass equipment. The chamber 20F has a main body 40 having an internal space for mixing gas, an introduction pipe 37 and an introduction pipe 38 which are connected to the main body 40 and introduce an bleed gas 60 and a cooling gas 61 into the main body 40, respectively. It has a lead-out pipe 45 connected to the main body 40 and leading out the mixed gas 62 from the main body 40, and a dust discharge pipe 36 connected to the main body 40 and discharging the dust separated from the bleed gas 60.

The two introduction pipes 37 and 38 have cylinders 37G and 38G inserted inside the main body 40. Introductory ports 37A and 38A are provided at the tips of the cylinders 37G and 38G. A lead-out port 45B is formed at the tip of one lead-out pipe 45. A dust discharge port 36B is formed at the connection portion between the main body portion 40 and the dust discharge pipe 36. That is, the chamber 20F has an introduction port 37A, 38A, an outlet port 45B, and a dust discharge port 36B in the main body 40.

In the chamber 20F, the introduction ports 37A and 38A are provided at the tips of the cylinders 37G and 38G inserted inside the main body 40, and the outlet 45B is the tip of the cylinder 45G inserted inside the main body 40. It is provided in the section. With reference to the introduction directions d3 and d4 of the bleed gas 60 and the cooling gas 61 introduced from the introduction port 37A and the introduction port 38A provided at the tips of the cylinders 37G and 38G, respectively, the outlet 45B is the introduction port 37A, It is located on the rear side of 38A. The outlet 45B is arranged on the rear side of the introduction ports 37A and 38A with reference to the outlet direction d5 of the mixed gas 62 led out from the outlet 45B provided at the tip of the tubular body 45G. The bleed gas 60 and the cooling gas 61 introduced from the introduction port 37A and the introduction port 38A circulate in the main body 40 along the directions of arrows F3 and F4, for example.

In the main body 40, the flow paths of the bleed gas 60 and the cooling gas 61 become complicated and long, so that the bleed gas 60 and the cooling gas 61 can be sufficiently mixed. Therefore, it is possible to suppress a so-called short-circuit flow in which the gases are not mixed with each other and are directly derived from the outlet 45B. As a result, it is possible to prevent the bleed air 60 and the cooling gas 61 from being led out from the outlet 45B without being sufficiently mixed. In addition, dust can be sufficiently recovered from the dust discharge port 36B. As a result, the property fluctuation and the temperature fluctuation of the mixed gas 62 led out from the outlet 45B are suppressed, and the operation of the chlorine bypass equipment and the cement clinker manufacturing equipment can be stabilized.

Two bleed gas 60s may be introduced into the main body 40 of the chamber 20F from the introduction ports 37A and 38A, respectively. Also in this case, the property fluctuation and the temperature fluctuation of the bleed air 62 led out from the outlet 45B are suppressed, and the operation of the chlorine bypass equipment 110 and the cement clinker manufacturing equipment 210 can be stabilized.

The chambers 20E and 20F each have two gas inlets and one gas outlet, but are not limited thereto. For example, it may have three or more gas inlets. Further, it may have two or more gas outlets. In this case, the plurality of gas outlets are all arranged on the rear side of all the introduction ports with reference to the introduction direction of the gas introduced from each of the plurality of gas introduction ports. As a result, the gases introduced from the plurality of inlets can be sufficiently mixed. Further, the cylinders 37G, 38G, and 45G may be bent instead of straight pipes. Further, the cylinders 37G, 38G and 45G may be provided along the vertical direction.

FIG. 12 is a diagram showing still another example of the chamber provided in the chlorine bypass equipment. The chamber 20G includes a main body 40 having an internal space for mixing gas, two introduction pipes 46 and an introduction pipe 47 which are connected to the main body 40 and introduce an bleed gas 60 and a cooling gas 61 into the main body 40, respectively. It has a lead-out pipe 48 connected to the main body 40 and leading out the mixed gas 62 from the main body 40, and a dust discharge pipe 36 connected to the main body 40 and discharging the dust 65 separated from the extracted gas.

Introductory ports 46A and 47A are formed at the connection between the two introduction pipes 46 and 47 and the main body 40. The lead-out pipe 48 has a tubular body 48G inserted inside the main body 40. An outlet 48B is provided at the tip of the cylinder 48G. A dust discharge port 36B is formed at the connection portion between the main body portion 40 and the dust discharge pipe 36. That is, the chamber 20G has an introduction port 46A, 47A, an outlet port 48B, and a dust discharge port 36B in the main body 40.

In the chamber 20G, the outlet 48B is provided at the tip of the tubular body 48G inserted inside the main body 40. The introduction ports 46A and 47A are arranged on the front side of the outlet 48B with reference to the lead-out direction d5 of the mixed gas (bleed air) led out from the outlet 48B provided at the tip of the tubular body 48G. .. The bleed gas 60 and the cooling gas 61 introduced from the introduction ports 46A and 47A circulate in the main body 40 along the directions of arrows F5 and F6, for example.

In the main body 40, the flow paths of the bleed gas 60 and the cooling gas 61 become complicated and long, so that the bleed gas 60 and the cooling gas 61 can be sufficiently mixed. Therefore, it is possible to suppress a so-called short-circuit flow in which the gases are not mixed with each other and are directly derived from the outlet 48B. Further, the dust 65 can be sufficiently recovered from the dust discharge port 36B. As a result, the property fluctuation and the temperature fluctuation of the mixed gas 62 led out from the outlet 48B are suppressed, and the operation of the chlorine bypass equipment and the cement clinker manufacturing equipment can be stabilized.

The "front side" in the present disclosure includes not only the front side but also the diagonal front side. That is, it suffices as long as it is on the front side of the virtual plane orthogonal to the direction in which the gas is derived from the internal space of the main body at the outlet. As a result, the gas introduced from the introduction port needs to change its direction at an angle of 90 ° or more before being taken out from the outlet, so that the gas is sufficiently mixed in the main body 40.

The chambers 20F and 20G each had two gas inlets and one gas outlet, but are not limited to this. For example, it may have three or more gas inlets. Further, it may have two or more gas outlets. In this case, all of the plurality of gas outlets are arranged on the rear side of all the inlets with reference to the direction of the gas derived from each of the plurality of gas outlets. As a result, the gases introduced from the plurality of inlets can be sufficiently mixed.

FIG. 13 is a diagram showing a cement clinker manufacturing facility according to an embodiment. The cement clinker manufacturing facility 200 was obtained by a preheating calcining section 70 for preheating and calcining a cement raw material, a cement kiln 50 for obtaining a cement clinker by firing a preheated and calcined cement raw material, and a cement kiln 50. A clinker cooler 80 for cooling the cement clinker and a chlorine bypass facility 100 are provided. The preheating calcining section 70 has four cyclones C1, C2, C3, C4 (preheaters) and a calcining furnace 72.

The kiln butt 52 of the cement kiln 50 and the calcination furnace 72 of the preheating calcination section 70 are connected by a rising duct 51. In the vicinity of the connection portion between the rising duct 51 and the kiln tail 52, an air extraction pipe 12 of a chlorine bypass facility 100 that extracts the kiln exhaust gas generated in the cement kiln 50 and recovers the dust contained in the kiln exhaust gas is connected. A cooling gas introduction unit 10 for introducing cooling gas is connected to the bleeding pipe 12 along the circumferential direction of the peripheral surface thereof. By providing the cement clinker manufacturing facility 200 with the chlorine bypass facility 100, the volatile components in the cement clinker manufacturing facility 200 can be reduced.

The cement raw material introduced from the connection portion between the cyclone C1 and the cyclone C2 is distributed through the cyclone C1, the cyclone C2, the cyclone C3, the rising duct 51, the calcining furnace 72, and the cyclone C4 to the kiln tail 52 of the cement kiln 50. be introduced. In the cement kiln 50, the preheated and calcined cement raw material is heated by the combustion of the burner 54 provided on the opposite side of the kiln tail 52 to become a cement clinker. The obtained cement clinker is cooled by the clinker cooler 80. After cooling by the clinker cooler 80, a cement clinker is obtained.

Since the cement clinker manufacturing facility 200 includes the chlorine bypass facility 100 having the chamber 20, the chlorine clinker manufacturing facility 100 and the cement clinker manufacturing facility 200 can be stably operated. In the present embodiment, the chlorine bypass equipment 100 has the chamber 20, but the cement clinker manufacturing equipment 210 including the chlorine bypass equipment 110 having the chamber 20A may be used. Further, the chambers 20C, 20E, 20F or 20G may be provided instead of the chamber 20 of the chlorine bypass equipment 100. Alternatively, two bleeding tubes 12 may be connected to the rising duct 51 or the kiln tail 52, and the two bleeding gases and the cooling gas may be mixed by the chambers 20B and 20D. Alternatively, two or more cement kilns 50 are provided, and the bleed gas from the bleed pipe 12 for bleeding each kiln exhaust gas is introduced into one of the chambers, and the two or more bleed gases or two or more bleed gases are introduced. The bleed air gas and the cooling gas may be mixed.

The method for producing cement clinker according to one embodiment can be carried out using the cement clinker production facility 200 or 210. In this manufacturing method, a preheating calcining step in which the cement raw material is preheated and calcined in the preheating calcining section 70 and the preheated and calcined cement raw material are introduced into the cement kiln 50 from the kiln tail 52 to manufacture a cement clinker. It has a firing step of performing the firing step and a recovery step of recovering at least a part of the volatile components contained in the kiln exhaust gas generated in the firing step as dust by the chlorine bypass facility 100. Further, it may have a clinker cooling step in which the cement clinker obtained in the firing step is cooled by the clinker cooler 80.

In the preheating and calcining step, the cement raw material is introduced from the flow path between the cyclone C1 and the cyclone C2. The cement raw material is preheated by circulating cyclone C1, cyclone C2 and cyclone C3. After that, it is introduced into the calcining furnace 72 and calcined. The calcining furnace 72 may be provided with a burner for burning fuel such as coal. The cement raw material (temporary firing raw material) calcined in the calcining furnace 72 is introduced into the cyclone C4 and heated.

In the firing step, the calcining raw material heated by the cyclone C4 is introduced into the kiln tail 52. After that, it is fired in a cement kiln 50 to become a cement clinker. In the recovery step, the kiln exhaust gas and the cooling gas are mixed into the bleed gas in the bleed pipe 12. This bleed gas is introduced into the chamber 20 and mixed with the cooling gas. Further, in the chamber 20, dust contained in the bleed air gas is collected. When this dust contains raw material dust, it may be used as a cement raw material.

The bleed gas from which dust has been removed in the chamber 20 is cooled by the heat exchanger 25. The bleed gas containing dust generated by cooling is introduced into the dust collector 26, and the dust is recovered as chlorine bypass dust. Since the chamber 20 is used in the recovery step in this way, fluctuations in the temperature and properties of the bleed gas (mixed gas) flowing out to the downstream side of the chamber 20 can be suppressed. Therefore, load fluctuations of the heat exchanger 25 and the dust collector 26 are suppressed, and each process can be operated stably.

The description of the chlorine bypass equipment 100, 110 and the cement clinker production equipment 200, 210 described above also applies to the production method.

Although some embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments, and each configuration of each embodiment and each modification may be combined or replaced. good. The shape of the main body of the chamber is not limited to the shape of a cube or a rectangular parallelepiped, and may be, for example, a columnar shape, a pentagonal columnar shape, or a quadrangular pyramid shape. Further, the dust discharging portion may be provided at the lower end of the mortar portion formed in the lower part of the main body portion and narrowing downward. When there is a structure in the chamber, it is preferable to provide a mortar-shaped lower end upstream of the structure in order to efficiently discharge dust in the chamber. When the cylinder is inserted in the main body of the chamber, it is preferable to provide a mortar-shaped lower end below the folded portion of the gas.

According to the present disclosure, it is possible to provide a chamber capable of stabilizing the operation of a chlorine bypass facility. Further, by providing such a chamber, it is possible to provide a chlorine bypass facility and a cement clinker manufacturing facility capable of stable operation. Further, it is possible to provide a method for producing cement clinker capable of stably producing cement clinker.

10 ... Cooling gas introduction part, 12 ... Extraction pipe, 14, 15 ... Introduction fan, 20, 20A, 20B, 20C, 20D, 20E, 20F, 20G ... Chamber, 25 ... Heat exchanger, 26 ... Dust collector, 28 ... Suction fan, 30, 31, 32, 33, 37, 38, 46, 47 ... Introduction pipe, 30A, 31A, 32A, 33A, 37A, 38A, 46A, 47A ... Introduction port, 34, 39, 45, 48 ... Outlet pipe, 34B, 39B, 45B, 48B ... Outlet port, 36 ... Dust discharge pipe, 36B ... Dust discharge port, 37G, 38G, 45G, 48G ... Cylinder, 40 ... Main body, 42, 42A, 42B, 42C, 42D, 42E, 42F, 42G, 42H, 42P, 44A, 44B, 44C, 44D, 44E, 44F ... Obstacles, 43 ... Through holes, 50 ... Clinker, 51 ... Rising duct, 52 ... Kiln butt, 54 ... Burner , 60 ... Extraction gas, 61 ... Cooling gas, 62 ... Extraction gas (mixed gas), 65 ... Dust, 70 ... Preheating temporary firing section, 72 ... Temporary combustion furnace, 80 ... Clinker cooler, 100, 110 ... Chlorine bypass equipment, 200, 210 ... Cement clinker manufacturing equipment, C1, C2, C3, C4 ... Cyclone, VL ₀ , VL ₁ , VL ₂ ... Virtual flow path.

Claims (11)

A chamber provided in a chlorine bypass in a cement clinker manufacturing facility and having a main body for merging multiple gases.
A plurality of inlets for introducing the bleed gas extracted by the bleed pipe of the chlorine bypass, or a gas different from the bleed gas and the bleed gas into the main body.
It is provided with at least one outlet for deriving the bleed air gas from the main body.
A chamber in which an obstacle is provided inside the main body so that a plurality of virtual flow paths connecting the plurality of inlets and the plurality of outlets are blocked. The chamber according to claim 1, wherein the obstacle includes at least one selected from the group consisting of a plate-shaped member, a columnar member, and a rotating member. The chamber according to claim 1 or 2, wherein at least one of the inlet and the outlet is provided at the tip of a cylinder inserted inside the main body. A chamber provided in a chlorine bypass in a cement clinker manufacturing facility and having a main body for merging multiple gases.
A plurality of inlets for introducing the bleed gas extracted by the bleed pipe of the chlorine bypass, or a gas different from the bleed gas and the bleed gas into the main body.
It is provided with at least one outlet for deriving the bleed air gas from the main body.
A chamber in which at least one of the inlet and the outlet is provided at the tip of a cylinder inserted inside the main body. The introduction port is provided at the tip end portion of the tubular body inserted inside the main body portion.
The chamber according to claim 4, wherein the outlet is arranged on the rear side of the introduction port with reference to the introduction direction of the gas introduced from the introduction port. The outlet is provided at the tip of the cylinder inserted inside the main body.
The chamber according to claim 4 or 5, wherein the introduction port is arranged on the front side of the outlet with reference to the direction of the gas led out from the outlet. The chamber according to any one of claims 1 to 6, wherein a dust discharge port for discharging dust contained in the bleed air gas is connected to the main body. The chamber according to any one of claims 1 to 7, wherein the gas different from the bleed gas is a cooling gas. A chlorine bypass facility comprising the chamber according to any one of claims 1-8. A preheating and calcined portion, a cement kiln, a rising duct, and a chlorine bypass facility having an air extraction pipe connected to the rising duct and / or the kiln tail of the cement kiln.
The chlorine bypass facility is a cement clinker manufacturing facility including the chamber according to any one of claims 1 to 8. Preheating and calcining process for preheating and calcining cement raw materials
A firing step of producing a cement clinker by firing the preheated and calcined cement raw material, and
A method for producing cement clinker, which comprises a recovery step of recovering at least a part of volatile components contained in the kiln exhaust gas generated in the firing step as dust by the chlorine bypass equipment according to claim 9.

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