JP2021160969A - Cooling gas introducing device, chlorine bypass facility, cement clinker manufacturing facility and method for manufacturing cement clinker - Google Patents

Abstract

To provide a cooling gas introducing device which makes it possible to stabilize an operation of a chlorine bypass facility and an operation of a cement clinker manufacturing facility.SOLUTION: A cooling gas introducing device 10 introduces a cooling gas so as to flow along a circumferential direction of a side surface 13 of an extraction steam pipe 12 of a chlorine bypass facility. A flow channel for the cooling gas 62 in an introduction part 11 of the cooling gas 62 is divided into a plurality of parts along a circulation direction of the cooling gas 62. The cooling gas introducing device includes control parts 11a to 11f configured so that at least one of an introduction position and an introduction amount of the cooling gas 62 into the extraction steam pipe 12 can be controlled.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a cooling gas introduction device, a chlorine bypass facility, a cement clinker manufacturing facility, and a cement clinker manufacturing method.

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.

Various techniques for suppressing dust accumulation and coaching in the bleed pipe of a chlorine bypass facility have been studied. For example, Patent Document 1 proposes to protect the inner wall of the bleeding pipe with an air curtain due to the backflow of the swirling flow of cooling air and to suppress the occurrence of coaching. Then, in order to adjust the backflow, it has been proposed to provide an inlet cross-sectional area variable mechanism of the air inlet such as a slide gate type. In Patent Document 2, dust removal that removes dust accumulated in the bleed air duct by ejecting a swirling flow of gas along the inner wall of the bleed air duct from the downstream side of the bleed air gas toward the exhaust duct side into the bleed air duct. It has been proposed to provide a nozzle.

Japanese Unexamined Patent Publication No. 9-175847 JP-A-2010-126410

As in Patent Document 1, changing the blowing position by changing the flow velocity of the cooling gas that protects the inner wall of the bleeding pipe by the insertion amount of the slide gate suppresses the accumulation of dust and coaching in the bleeding pipe of the chlorine bypass. It is considered to be effective for. However, in the slide gate type mechanism as in Patent Document 1, there is a limit to the degree of freedom in adjusting the blowing position of the cooling air. Further, in the technique of inserting and arranging the dust removing nozzle in the bleed air pipe as in Patent Document 2, there is a concern that dust is likely to be accumulated in the vicinity of the dust removing nozzle.

Therefore, in the present disclosure, it is possible to stabilize the operation of the chlorine bypass equipment by reducing the accumulation and adhesion of dust in the bleeding pipe and suppressing the heat loss due to the inflow of the cooling gas into the cement kiln. A possible cooling gas introduction device is provided. Further, by providing such a cooling gas introduction device, 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 cooling gas introduction device according to one aspect of the present disclosure is a cooling gas introduction device that introduces cooling gas along the circumferential direction of the side surface of the bleeding pipe of the chlorine bypass equipment, and is a cooling gas introduction device in the cooling gas introduction portion. The flow path is divided into a plurality of sections along the flow direction of the cooling gas, and includes an adjusting unit configured to be able to adjust at least one of the introduction position and the introduction amount of the cooling gas into the bleeding pipe.

In the cooling gas introduction device, the flow path of the cooling gas in the cooling gas introduction portion is divided into a plurality of sections along the flow direction of the cooling gas, and at least one of the introduction position and the introduction amount of the cooling gas into the bleeding pipe is set. It is provided with an adjustment unit for adjustment. Therefore, at least one of the introduction position and the introduction amount of the cooling gas into the bleeding pipe is adjusted according to the dust accumulation condition and the operation condition of the cement kiln to reduce the dust accumulation and adhesion in the bleeding pipe. In addition, it is possible to suppress heat loss due to the inflow of cooling gas into the kiln. Therefore, the operation of the chlorine bypass equipment and the cement clinker manufacturing equipment can be stabilized.

It is preferable that the adjusting unit individually adjusts the amount of cooling gas introduced from each of the flow paths formed by being partitioned into a plurality of sections. In this way, if the amount of cooling gas introduced from each flow path is individually adjusted, the position and amount of cooling gas introduced into the bleeding pipe can be adjusted with high accuracy. Therefore, the operation of the chlorine bypass facility and the cement clinker manufacturing facility can be further stabilized.

The adjusting portion preferably has a shaft body and a member that is rotatably or swingably attached to the shaft body. As a result, the position and amount of the cooling gas introduced into the bleeding pipe can be adjusted with high accuracy while having a simple structure. Therefore, the operation of the chlorine bypass equipment can be further stabilized.

The cooling gas introduction device according to one aspect of the present disclosure is a cooling gas introduction device that introduces cooling gas along the circumferential direction of the side surface of the bleeding pipe of the chlorine bypass equipment, and the cooling gas is introduced into the cooling gas introduction portion. A control unit that is inserted into the flow path of the flow path and has an insertion member that is configured to be movable in the throttle portion of the flow path, and that is configured to be able to adjust at least one of the introduction position and the introduction amount of the cooling gas by the insertion member. Be prepared.

Since the cooling gas introduction device includes an adjustment unit for adjusting the introduction position of the cooling gas, the introduction position of the cooling gas into the bleeding pipe is adjusted according to the dust accumulation state and the operation state of the cement kiln. be able to. Therefore, it is possible to reduce the accumulation and adhesion of dust in the bleed air pipe and to suppress the heat loss due to the inflow of the cooling gas into the kiln. Therefore, the operation of the chlorine bypass equipment and the cement clinker manufacturing equipment can be stabilized.

The cooling gas introduction device is based on an air extraction pipe, a measuring unit that measures at least one operation information selected from a rising duct, a cement kiln, and a kiln tail through which the air extraction pipe communicates, and an operation information measured by the measurement unit. It is preferable that the adjusting unit has a control unit that outputs a control signal for adjusting at least one of the introduction position and the introduction amount of the cooling gas. As a result, the position and amount of the cooling gas introduced into the bleeding pipe can be adjusted according to the operating conditions of the chlorine bypass equipment and the cement kiln. Therefore, the operation of the chlorine bypass equipment can be further stabilized.

The chlorine bypass equipment according to one aspect of the present disclosure includes any of the above-mentioned cooling gas introduction devices. The cooling gas introduction device includes an adjusting unit configured to be able to adjust at least one of the introduction position and the introduction amount of the cooling gas into the bleeding pipe. Thereby, at least one of the introduction position and the introduction amount of the cooling gas into the bleeding pipe can be adjusted according to the dust accumulation state of the bleeding pipe and the operating condition of the cement kiln. Therefore, it is possible to reduce the accumulation and adhesion of dust in the bleed air pipe and to suppress the heat loss due to the inflow of the cooling gas into the kiln. Therefore, the chlorine bypass equipment and the cement clinker manufacturing equipment can be operated stably.

The cement clinker manufacturing facility according to one aspect of the present disclosure includes a preheating and calcined portion, a cement kiln, a rising duct, and a chlorine bypass facility connected to the rising duct and / or the kiln butt of the cement kiln. The equipment is equipped with any of the cooling gas introduction devices described above. Since this cement clinker manufacturing facility is equipped with any of the above-mentioned cooling gas introduction devices, the position where the cooling gas is introduced into the extraction pipe and the position where the cooling gas is introduced into the extraction pipe are determined according to the dust accumulation condition of the extraction pipe and the operation condition of the cement kiln. At least one of the introduction amounts can be adjusted. Therefore, it is possible to reduce the accumulation and adhesion of dust in the bleed air pipe and to suppress the heat loss due to the inflow of the cooling gas into the kiln. Therefore, the cement clinker manufacturing equipment can be operated stably.

The method for producing cement clinker according to one aspect of the present disclosure includes a preheating and calcining step of preheating and calcining the cement raw material, and a firing step of calcining the preheated and calcined cement raw material to produce the cement clinker. It has a cooling step of introducing a cooling gas along the circumferential direction of the side surface of the bleeding pipe of the chlorine bypass facility to cool the bleeding gas extracted by the bleeding pipe. In the cooling step, the cooling gas is introduced into the bleed air pipe to cool the bleed air gas by using any of the above-mentioned cooling gas introduction devices.

In this manufacturing method, the above-mentioned cooling gas introduction device is used in the cooling step of cooling the bleed gas. Therefore, the introduction position or the introduction amount of the cooling gas can be adjusted according to the dust accumulation and adhesion state of the bleeding pipe and the operation state of the cement kiln. Therefore, it is possible to reduce the accumulation and adhesion of dust in the bleed air pipe and to suppress the heat loss due to the inflow of the cooling gas into the kiln. Therefore, the operation of the chlorine bypass equipment and the cement clinker manufacturing equipment can be stabilized.

According to the present disclosure, by reducing the accumulation and adhesion of dust in the bleeding pipe and suppressing the heat loss due to the inflow of cooling gas into the cement kiln, the operation of chlorine bypass equipment and the operation of cement clinker manufacturing equipment It is possible to provide a cooling gas introduction device capable of stabilizing the operation. Further, by providing such a cooling gas introduction device, 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 enlarges and shows the vicinity of the connection part of a bleeding pipe and a cooling gas introduction device. It is a figure which shows an example of the cooling gas introduction apparatus. It is a figure which shows another example of a cooling gas introduction apparatus. It is a figure which shows the modification of the chlorine bypass equipment. It is a figure which shows another modification of the chlorine bypass equipment. FIG. 6 is a sectional view taken along line VII-VII of FIG. (A) and (B) are diagrams showing an example of a chamber provided in a chlorine bypass facility. (A) and (B) are diagrams showing another example of a chamber provided in a chlorine bypass facility. 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 the chlorine bypass equipment 100 according to the 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 a cement clinker is manufactured by extracting kiln gas containing volatile components such as chlorine generated by the production of the cement clinker. Reduce volatile components such as chlorine in the equipment 200.

The chlorine bypass facility 100 extracts bleed air from the rising duct 51 and / or the kiln end 52 of the cement kiln 50, mixes the bleed air with the cooling gas, and obtains the bleed gas containing the bleed gas and the cooling gas. , A chamber 20 for separating the lumpy dust contained in the bleed air from the bleed air pipe 12, a heat exchanger 25 for cooling the bleed air gas from which the lumpy dust is separated below the melting point of the volatile alkali salt, and a heat exchanger 25 for cooling. The dust (chlorine bypass dust) contained in the bleed air that has been deposited is separated from the bleed air by the dust collector 26, and the suction that extracts the bleed air through the chamber 20, the heat exchanger 25, and the dust collector 26. It is equipped with a fan 28. 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 chlorine bypass equipment 100 includes a cooling gas introduction device 10 that introduces cooling gas into the bleeding pipe 12, and an introduction fan 14 that supplies cooling gas to the cooling gas introduction device 10. 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 acceptance, storage, and fermentation of hydrous sludge such as sewage sludge brought into a cement manufacturing factory, and exhaust gas discharged from a suction fan 28 and a suction fan in another process. Be done.

As shown in FIG. 1, the bleeding pipe 12 may be inclined with respect to the horizontal direction or may be horizontal. From the viewpoint of suppressing the accumulation of dust in the bleeding pipe 12, when the rising duct 51 (kiln butt 52) of the bleeding pipe 12 is on the upstream side and the chamber 20 side is on the downstream side, the downstream side is better than the upstream side. It is preferable that it is inclined so as to be high. As a result, the dust containing the raw material dust can be returned to the rising duct 51 or the kiln tail 52 by the swirling flow and gravity. The tilt angle may be, for example, 20 to 70 ° upward with respect to the horizontal plane.

FIG. 2 is an enlarged view showing the vicinity of the connection portion between the bleeding pipe 12 and the cooling gas introduction device 10. The kiln gas 60 contains dust as a solid content together with a gaseous volatile component at the bleed air port 12a which is the inlet of the bleed air pipe 12. This dust may include raw material dust that becomes a cement clinker. The cooling gas introduction device 10 is connected to the bleeding pipe 12 so as to extend in the tangential direction of the side surface 13 of the circular bleeding pipe 12. The cooling gas 62 introduced from the cooling gas introduction device 10 is introduced along the circumferential direction of the side surface 13 of the bleeding pipe 12. As a result, an air curtain is formed on the inner wall surface of the bleeding pipe 12 by the swirling flow of the cooling gas 62, and protects the inner wall surface of the bleeding pipe 12 from the high temperature kiln gas 60.

The cooling gas 62 introduced from the cooling gas introduction device 10 along the circumferential direction of the side surface 13 of the bleeding pipe 12 and the kiln gas 60 flowing into the bleeding pipe 12 from the bleeding port 12a become a mixed gas and become the bleeding pipe 12 The swirling flow SF1 and SF2 are formed in the above. The swirling shafts of the swirling flows SF1 and SF2 and the central shaft of the bleeding pipe 12 having a circular tube shape substantially coincide with each other. The mixed gas moves along the longitudinal direction of the bleeding pipe 12 while swirling inside the bleeding pipe 12.

The cooling gas introduction device 10 has an extension unit 16 that expands the flow path 15 of the cooling gas along the flow direction of the cooling gas 62 in the introduction unit 11 that introduces the cooling gas 62 into the bleeding pipe 12. In the expansion portion 16, the flow path 15 is divided into a plurality of sections along the flow direction of the cooling gas 62 by the partition body 17. In the compartment 17, each of the partitioned flow paths 15a, 15b, 15c, 15d, 15e, and 15f may be composed of a member (for example, a plate-shaped member) that can be isolated from the adjacent flow paths. Since the cooling gas is rectified by partitioning the flow path 15 into a plurality of sections 17 in this way, the swirling flows SF1 and SF2 can be made more stable.

The flow paths 15a, 15b, 15c, 15d, 15e, and 15f (hereinafter collectively referred to as "15a to 15f") are adjusting units 11a and 11b for adjusting the amount of cooling gas 62 introduced into the bleeding pipe 12, respectively. , 11c, 11d, 11e, 11f (hereinafter collectively referred to as "11a to 11f"). The adjusting units 11a to 11f are configured so that the amount of the cooling gas 62 introduced can be adjusted independently. Thereby, the introduction unit 11 can adjust the introduction amount of the cooling gas 62. Further, if the adjusting units 11a to 11f selectively fully close a part of the flow paths 15a to 15f, the introduction unit 11 can also adjust the introduction position of the cooling gas 62 into the bleeding pipe 12.

For example, the flow rate of the cooling gas from the flow paths 15a, 15b, 15c located on the upstream side of the bleeding pipe 12 is larger than the flow rate of the cooling gas from the flow paths 15d, 15e, 15f located on the downstream side of the bleeding pipe 12. The swirling flow SF2 can be strengthened by adjusting the adjustment units 11a to 11f so as to increase the number. On the other hand, the flow rate of the cooling gas from the flow paths 15d, 15e, 15f located on the downstream side of the bleeding pipe 12 is larger than the flow rate of the cooling gas from the flow paths 15a, 15b, 15c located on the upstream side of the bleeding pipe 12. The swirling flow SF1 can be strengthened by adjusting the adjustment units 11a to 11f so as to increase the number.

For example, if the introduction of the cooling gas 62 is continued so that the swirling flow SF1 is formed stronger, dust may be accumulated on the upstream side (rising duct 51 side) of the bleeding pipe 12. In this case, the adjusting units 11a to 11f change the introduction position of the cooling gas 62 to the upstream side of the bleeding pipe 12, or the flow rate of the cooling gas from the flow paths 15a, 15b, 15c located on the upstream side of the bleeding pipe 12. The swirling flow SF2 can be strengthened by increasing the number of. As a result, the dust accumulated on the upstream side of the bleeding pipe 12 can be removed by the swirling flow SF2. The dust accumulated on the upstream side of the bleeding pipe 12 may be returned to the rising duct 51 (kiln tail 52) by the swirling flow SF2, or may be led out to the downstream side of the bleeding pipe 12.

The dust deposited on the upstream side of the bleeding pipe 12, that is, in the vicinity of the bleeding port 12a may have a higher content of raw material dust as a cement clinker than the volatile component. By returning the dust containing such raw material dust into the rising duct 51 (kiln tail 52), the amount of chlorine bypass dust can be reduced and the yield of cement clinker can be increased.

It is preferable that the amount of the cooling gas (or the mixed gas of the cooling gas and the kiln gas) introduced into the bleeding pipe 12 into the rising duct 51 (the kiln tail 52) is small. Thereby, heat loss can be suppressed. Therefore, for example, when the amount of kiln gas generated decreases due to factors such as changes in the cement raw material and the amount of cooling gas or mixed gas flowing in from the bleeding pipe 12 to the rising duct 51 (kiln tail 52) increases. , The adjusting units 11a to 11f reduce the flow rate of the cooling gas from the flow paths 15a, 15b, 15c located on the upstream side of the bleeding pipe 12, or stop the introduction, and the flow paths 15d, 15e, 15f located on the downstream side. The flow rate of the cooling gas 62 from the above may be increased or the introduction may be started. Thereby, the heat loss in the preheater, the calcining furnace and the like can be reduced.

FIG. 3 is a diagram showing an example of a cooling gas introduction device. The cooling gas introduction device 10A of FIG. 3 has an expansion unit 16 in the introduction unit 11A that expands the flow path 15 of the cooling gas along the flow direction of the cooling gas 62. In the expansion portion 16, the flow path 15 is partitioned into the flow paths 15a to 15f along the flow direction of the cooling gas 62 by the partition body 17. Adjustment units 11a to 11f are provided in the flow paths 15a to 15f, respectively. The adjusting portions 11a to 11f each include a shaft body 30 and a member 32 that is rotatably or swingably attached to the shaft body 30. Such adjusting units 11a to 11f can individually adjust the amount of cooling gas introduced from each of the flow paths 15a to 15f.

In FIG. 3, a part of the flow paths (flow paths 15a to 15c) is closed by the adjusting portions 11a to 11c, and only the other flow paths (flow paths 15d to 15f) are open. In this case, the cooling gas 62 is not supplied from the flow paths 15a to 15c, and the cooling gas 62 can be supplied only from the flow paths 15d to 15f. From this state, for example, at least a part of the adjusting portions 11a to 11f is adjusted to start the introduction of the cooling gas from at least one of the flow paths 15a to 15c, or cooling from at least one of the flow paths 15d to 15f. If the introduction of the gas is stopped, the position where the cooling gas 62 is introduced into the bleeding pipe 12 can be adjusted. As described above, the introduction unit 11A has the flow paths 15a to 15f and the individually provided adjustment units 11a to 11f, so that the introduction state of the cooling gas into the bleeding pipe 12 can be adjusted with a high degree of freedom. Can be done. Therefore, it is possible to sufficiently stabilize the operation of the chlorine bypass equipment 100.

The adjusting units 11a to 11f may have, for example, a structure capable of adjusting the amount of the cooling gas 62 introduced. For example, it may be composed of a normal valve such as a ball valve, a gate valve, or a butterfly valve, or may be composed of a damper.

The length L of the flow paths 15a to 15f along the flow direction of the cooling gas 62 is preferably 5 times or more the width D of the flow paths 15a to 15f. As a result, even if the flow of the cooling gas 62 is disturbed by the expansion unit 16, the flow of the cooling gas 62 can be sufficiently rectified in the flow paths 15a to 15f.

FIG. 4 is a diagram showing an example of a cooling gas introduction device. The cooling gas introduction device 10B of FIG. 4 is different from the cooling gas introduction device 10A of FIG. 3 in that it has an introduction unit 11B having an adjusting unit 11g instead of the introduction unit 11A. The introduction unit 11B of the cooling gas introduction device 10B includes an adjustment unit 11g on the downstream side of the expansion unit 16. The adjusting unit 11g has two insertion members 33A and 33B that are inserted inside the cooling gas flow path 15. The insertion members 33A and 33B may be, for example, plate-shaped members such as a baffle plate that narrows the flow path of the cooling gas 62. The two insertion members 33A and 33B are independently supported by support portions (not shown) that are slidable along a direction orthogonal to the flow direction of the cooling gas 62.

When the insertion members 33A and 33B narrow the flow path 15, the narrowing portion 18 is formed between the insertion members 33A and 33B. By sliding the insertion members 33A and 33B along the arrow direction (longitudinal direction of the bleeding pipe 12), the position of the throttle portion 18 can be moved along the longitudinal direction of the bleeding pipe 12. The introduction unit 11B of the cooling gas introduction device 10B can adjust the introduction position of the cooling gas 62 introduced into the bleeding pipe 12 by having the adjustment unit 11g having such a structure. Further, the amount of the cooling gas 62 introduced can be adjusted by changing the width of the throttle portion 18 with the adjusting portion 11g. The adjustment of the introduction amount of the cooling gas 62 and the adjustment of the introduction position may be performed at the same time.

The introduction unit 11B can adjust the introduction position and the introduction amount of the cooling gas 62 into the bleeding pipe 12 according to the accumulation state of dust in the bleeding pipe 12, the amount of kiln gas flowing in from the bleeding port 12a, and the like. .. Therefore, it is possible to reduce the accumulation and adhesion of dust in the bleeding pipe 12 and to suppress the heat loss due to the inflow of the cooling gas into the kiln.

The throttle portion 18 may be composed of a plurality of insertion members such as the adjusting portion 11g, or may be composed of, for example, one insertion member having a hole formed therein. Further, when it is necessary to introduce a large amount of the cooling gas 62 into the bleeding pipe 12, the insertion members 33A and 33B may be completely removed from the flow path 15. That is, the insertion members 33A and 33B may be configured so that they can be inserted and removed from the flow path 15. Further, the introduction unit 11B does not have to have the expansion unit 16. However, by having the expansion portion 16, the adjustment range of the introduction position of the cooling gas 62 into the bleeding pipe 12 can be increased.

The adjustment of the introduction position and the introduction amount of the cooling gas 62 into the bleeding pipe 12 by the adjusting parts 11a to 11f, 11g in the introducing parts 11, 11A, 11B of the cooling gas introducing devices 10, 10A, 10B described above is, for example, the bleeding pipe. This may be performed based on the measuring unit that measures the operation information of the rising duct 51, the cement kiln 50, or the kiln tail 52 through which the bleeding pipe 12 communicates. For example, the operator may manually adjust the introduction position and / or the introduction amount using the adjustment units 11a to 11g based on the operation information of the bleeding pipe, or may automatically adjust the introduction position and / or the introduction amount using the control unit. In this case, the chlorine bypass equipment 100 preferably includes a measuring unit that measures at least one operation information of the bleeding pipe 12, the rising duct 51, the cement kiln 50, and the kiln tail 52.

Examples of the operation information measured by the measuring unit include temperature, pressure, gas component, gas flow velocity, dust concentration, image, and the like. Specifically, the temperature inside or on the surface of the bleed air pipe 12, the temperature of the kiln gas in the rising duct 51 or the kiln tail 52, the temperature of the kiln gas flowing into the bleed air pipe 12, the pressure of the kiln gas or the bleed air gas, the kiln gas or the bleed air gas. The gas component of the above, the dust concentration contained in the kiln gas or the bleed air gas, the image of the inside of the bleed air pipe 12, and the like can be mentioned. Examples of the measuring unit include a temperature sensor, a pressure sensor, a gas component sensor, a flow velocity sensor, a camera, and the like.

The chlorine bypass equipment 100 may include a control unit that outputs a control signal for adjusting the introduction position and / or the introduction amount of the cooling gas to the adjustment units 11a to 11f, 11g based on the operation information measured by the measurement unit. good. The control unit may be a normal computer system, and may include, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an input / output interface, and the like.

By providing the control unit, the adjusting units 11a to 11g can automatically control the introduction position and the introduction amount of the cooling gas 62. For example, the temperature T1 near the bleeding port 12a of the bleeding pipe 12 is measured by the measuring unit, and when the temperature T1 falls below the lower limit, the adjusting units 11a to 11f, 11g set the introduction position of the cooling gas 62 in the bleeding pipe 12. Move to the downstream side. Alternatively, the amount of cooling gas 62 introduced is reduced. As a result, it is possible to prevent the cooling gas from flowing into the rising duct 51 (kiln tail 52). On the other hand, when the temperature T1 exceeds the upper limit, the adjusting units 11a to 11g change the introduction position of the cooling gas toward the upstream side of the bleeding pipe 12. Alternatively, the amount of cooling gas 62 introduced is increased. As a result, the amount of dust that accompanies the kiln gas and is brought into the bleeding pipe 12 can be reduced.

FIG. 5 is a diagram showing a modified example of the chlorine bypass equipment. In this modification, the formation of a swirling flow is promoted inside the bleeding pipe 12 from the end portion 12b side opposite to the bleeding port 12a of the bleeding pipe 12, and the swirling flow proceeds along the longitudinal direction of the bleeding pipe 12. It differs from the above embodiment in that the inner cylinder 40 that guides the direction is inserted. When viewed along the longitudinal direction of the bleeding pipe 12, the tip 40a of the inner cylinder 40 is a connection portion between the bleeding port 12a, which is an inlet of the kiln gas to the bleeding pipe 12, and the bleeding pipe 12 and the cooling gas introduction device 10. It is placed between. As a result, the swirling flow generated by the cooling gas introduced from the cooling gas introduction device 10 once heads for the bleed air port 12a, and then flows into the inner cylinder 40 from the tip 40a of the inner cylinder 40, and then flows into the inner cylinder 40. It circulates downstream of the body 40. Thereby, the accumulation of dust on the inner wall of the bleeding pipe 12 and the inner wall of the inner cylinder 40 can be sufficiently suppressed.

If the inner cylinder 40 is simply provided, the cooling gas may not sufficiently reach the bleed air port 12a, and dust may be accumulated or adhered. However, the cooling gas introduction device 10 includes adjustment units 11a to 11f. Therefore, the dust adhering to the vicinity of the bleed air port 12a can be removed by adjusting the introduction position and / or the introduction amount of the cooling gas with the adjusting units 11a to 11f. When the amount of kiln gas generated decreases, the cooling gas (mixed gas) flows into the rising duct 51 (kiln tail 52) by changing the introduction position of the cooling gas from the upstream side to the downstream side of the bleeding pipe 12. Can be suppressed. The bleed air 63 introduced into the inner cylinder 40 circulates toward the downstream of the inner cylinder 40. As shown in FIG. 1, a chamber 20, a heat exchanger 25, a dust collector 26, and a suction fan 28 may be provided on the downstream side of the inner cylinder 40.

In the modified example of FIG. 5, the cooling gas introduction device 10 is provided, but the cooling gas introduction device 10 may be the cooling gas introduction device 10A or the cooling gas introduction device 10B.

6 and 7 are views showing another modification of the chlorine bypass equipment. FIG. 7 is a sectional view taken along line VII-VII of FIG. In this modification, a double pipe 41 that promotes the formation of a swirling flow and guides the traveling direction of the swirling flow is inserted into the inside of the bleeding pipe 12 from the end portion 12b side of the bleeding pipe 12. The double pipe 41 includes a first pipe 41A and a second pipe 41B inserted into the first pipe 41A. The first tubular body 41A is slidably provided along the longitudinal direction of the second tubular body 41B. As shown in FIG. 7, the first pipe body 41A and the second pipe body 41B are provided so as to be concentric with the bleeding pipe 12 (center C). Similar to the inner cylinder 40 of FIG. 5, the double pipe 41 has a function of promoting the formation of the swirling flow SF inside the bleeding pipe 12 and guiding the traveling direction of the swirling flow SF along the longitudinal direction of the bleeding pipe 12. Has.

By sliding the first tube 41A with respect to the second tube 41B, the position of the tip 41a of the first tube 41A can be changed.

The chlorine bypass equipment of this modification includes a cooling gas introduction device 10B having an adjusting unit 11g. Therefore, by moving the throttle portion 18, the introduction position and the introduction amount of the cooling gas 62 in the bleeding pipe 12 can be changed. Further, since the double pipe 41 is provided, the tip position of the double pipe 41 in the bleeding pipe 12 can be made variable. Since the tip position of the double pipe 41 can be adjusted in addition to the adjustment of the introduction position and the introduction amount of the cooling gas 62 by the adjusting unit 11g, the flow state of the swirling flow can be adjusted with a higher degree of freedom. Therefore, even if the amount of kiln gas generated and the amount of dust generated change significantly, the accumulation and adhesion of dust on the inner wall of the bleeding pipe 12 and the inflow of cooling gas into the rising duct 51 (kiln tail 52). Can be sufficiently suppressed.

The bleed gas 63 circulates toward the downstream of the double pipe 41. As shown in FIG. 1, a chamber 20, a heat exchanger 25, a dust collector 26, and a suction fan 28 may be provided on the downstream side of the double pipe 41. In the modified examples of FIGS. 6 and 7, the cooling gas introduction device 10B is provided, but the cooling gas introduction device 10 (cooling gas introduction device 10A) may be used.

FIG. 8 shows an example of a chamber 20 provided in a chlorine bypass facility. FIG. 8A is a front view of the chamber 20A, and FIG. 8B is a top view of the chamber 20A. The chamber 20A includes a main body 21 having an internal space for separating at least a part of dust contained in the bleed air 63 from the bleed air pipe 12, an introduction pipe 22 for introducing the bleed air gas into the main body 21, and the main body 21. It includes a dust discharge pipe 24 that discharges dust separated from the bleed air gas, and a lead-out pipe 23 that leads out an bleed air gas 64 having less dust than the bleed air gas 63 from the main body 21.

In the chamber 20A, the introduction port 22a is formed at the connection portion between the main body portion 21 and the introduction pipe 22, and the outlet port 23a is formed at the connection portion between the main body portion 21 and the outlet pipe 23. As shown in FIGS. 8A and 8B, the extension line (virtual introduction line VG) of the bleed air 63 introduced from the introduction port 22a in the introduction direction is deviated from the outlet 23a and is the main body. It intersects the inner wall of 21. In the chamber 20A having such a main body 21, the dust contained in the bleed air 63 can be efficiently separated, and the dust accompanying the bleed air 64 led out from the outlet 23a can be sufficiently reduced. It is preferable that the virtual introduction line VG is also displaced from the dust discharge port 24a formed at the connection portion between the main body portion 21 and the dust discharge pipe 24. As a result, it is possible to prevent the dust once separated from the bleed air 63 from being mixed into the bleed air 63 again.

FIG. 9 shows another example of a chamber provided in a chlorine bypass facility. 9 (A) is a front view of the chamber 20B, and FIG. 9 (B) is a top view of the chamber 20B. Like the chamber 20A, the chamber 20B also includes a main body 21, an introduction pipe 22, a dust discharge pipe 24, and a lead-out pipe 23. As shown in FIGS. 9A and 9B, the extension line (virtual introduction line VG) of the bleed air 63 introduced from the introduction port 22a in the introduction direction is deviated from the outlet 23a and is the main body. It intersects the inner wall of 21. The virtual introduction line VG is also deviated from the dust discharge port 24a. Therefore, the chamber 20B can also efficiently separate the dust contained in the bleed air 63 and sufficiently reduce the dust accompanying the bleed air 64 led out from the outlet 23a.

The configuration of the chamber is not limited to that illustrated in FIGS. 8 and 9. For example, the virtual introduction line VG shown in FIGS. 8 and 9 described above is deviated from the outlet 23a and the dust discharge port 24a in the front view (A) and the top view (B), respectively, but in yet another example. Then, in either the front view (A) or the top view (B), the outlet 23a and the dust discharge port 24a may be deviated from each other. Even in such an example, the dust contained in the bleed air 63 can be efficiently separated. Further, it is possible to prevent the dust separated from the bleed air 63 from being mixed into the bleed air 63 again. Further, although the chlorine bypass equipment 100 of the present embodiment includes the chamber 20, it is not necessary to include the chamber in another embodiment. Even in this case, the dust contained in the bleed air gas can be collected by, for example, 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. 10 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 is 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 butt 52, an air extraction pipe 12 of a chlorine bypass facility 100 that extracts the kiln gas generated in the cement kiln 50 and recovers the dust contained in the kiln gas is connected. The bleeding pipe 12 is provided with a cooling gas introduction device 10 for introducing a cooling gas along the circumferential direction of the side surface 13. The cooling gas introduction device 10 includes an adjustment unit for adjusting the introduction position and / or the introduction amount of the cooling gas into the bleeding pipe 12 in the introduction unit 11. By providing the chlorine bypass facility 100 having such a cooling gas introduction device 10, 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 cooling gas introduction device 10, the position where the cooling gas is introduced into the bleeding pipe 12 and / or the position where the cooling gas is introduced into the bleeding pipe 12 are determined according to the dust accumulation state of the bleeding pipe 12 and the operating condition of the cement kiln 50. The amount of introduction can be adjusted. Therefore, the accumulation and adhesion of dust in the bleeding pipe 12 can be reduced, and the cement clinker manufacturing facility 200 can be operated stably.

The method for producing cement clinker according to one embodiment can be carried out using the cement clinker production facility 200. In this manufacturing method, a preheating calcining step of preheating and calcining a cement raw material in a preheating calcining unit 70 and a preheated and calcined cement raw material are introduced into a cement kiln 50 from a kiln tail 52 to manufacture a cement clinker. The firing step is included in the firing step, and the cooling step of introducing the cooling gas along the circumferential direction of the side surface 13 of the bleeding pipe 12 of the chlorine bypass facility 100 to cool the bleeding gas extracted by the bleeding pipe 12, and the bleeding gas. It has a recovery step of recovering dust. 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 cooling step, a cooling gas is introduced along the circumferential direction of the side surface 13 of the bleed pipe 12 to cool the bleed gas extracted by the bleed pipe 12. At this time, the introduction amount and / or the introduction position of the cooling gas is adjusted by the adjusting unit. In the cooling step, the amount and / or the introduction position of the cooling gas introduced into the bleeding pipe 12 can be adjusted according to the dust accumulation state of the bleeding pipe 12 and the operating condition of the cement kiln 50. Therefore, the accumulation and adhesion of dust in the bleeding pipe 12 can be reduced, and the cooling step and the firing step can be stabilized. Therefore, the cement clinker can be stably produced.

In the cooling step, the introduction position of the cooling gas introduced into the bleeding pipe 12 from the introduction portion 11 of the cooling gas introducing device 10 and the introduction position of the cooling gas introduced into the bleeding pipe 12 based on the operation information of the bleeding pipe 12, the rising duct 51, the cement kiln 50, or the kiln tail 52. / Or the introduction amount may be adjusted. The cooling gas introduction position and / or the introduction amount can be adjusted by individually adjusting the introduction amount of the cooling gas in each of the flow paths 15a to 15f formed by being partitioned by the adjusting portions 11a to 11f. can.

The chlorine bypass facility 100 of the cement clinker manufacturing facility 200 may have a cooling gas introduction device 10B instead of the cooling gas introduction device 10. In this case, the introduction position and / or the introduction amount of the cooling gas in the bleeding pipe 12 can be adjusted by the adjusting portion 11g by moving the drawing portion 18 or changing the size of the drawing portion 18.

According to the above manufacturing method, dust in the bleeding pipe 12 can be efficiently removed, and the cooling step and the firing step can be stabilized. Therefore, the cement clinker can be stably produced. The description of the chlorine bypass facility 100 and the cement clinker manufacturing facility 200 described above also applies to the manufacturing method.

Although some embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments. Each configuration of each embodiment and each modification may be combined or replaced. Further, the bleeding pipe 12 may be connected only to the kiln tail 52 or only the rising duct 51, or two or more bleeding pipes 12 may be connected to each of the rising duct 51 and the kiln butt 52. .. In this case, the bleed gas containing the dust extracted by the plurality of bleed pipes 12 may be mixed in the chamber to collect the dust, and after the dust is reduced in the individual chambers, the dust remaining in the dust collector is collected. It may be recovered. Further, for example, the inner diameter of the bleeding pipe 12 does not have to be constant and may change along the longitudinal direction. In this case, the bleeding pipe 12 may have a tapered portion whose inner diameter becomes smaller as it approaches the rising duct 51 (kiln tail 52).

According to the present disclosure, by reducing the accumulation and adhesion of dust in the bleeding pipe and suppressing the heat loss due to the inflow of cooling gas into the cement kiln, the operation of chlorine bypass equipment and the operation of cement clinker manufacturing equipment A cooling gas introduction device capable of stabilizing the operation is provided. Further, by providing such a cooling gas introduction device, a chlorine bypass facility and a cement clinker manufacturing facility capable of stable operation are provided. Further, a method for producing cement clinker capable of stably producing cement clinker is provided.

10, 10A, 10B ... Cooling gas introduction device, 11, 11A, 11B ... Introduction part, 11a, 11b, 11c, 11d, 11e, 11f, 11g ... Adjustment part, 12 ... Extraction pipe, 12a ... Extraction port, 12b ... End Section, 13 ... Side surface, 14 ... Introduction fan, 15 ... Flow path, 15a, 15b, 15c, 15d, 15e, 15f ... Flow path, 16 ... Expansion part, 17 ... Section, 18 ... Squeezing part, 20, 20A, 20B ... Chamber, 21 ... Main body, 22 ... Introduction pipe, 22a ... Introduction port, 23 ... Outlet pipe, 23a ... Outlet port, 24 ... Dust discharge pipe, 24a ... Dust discharge port, 25 ... Heat exchanger, 26 ... Collection Dust, 28 ... suction fan, 30 ... shaft body, 32 ... member, 33A, 33B ... insertion member, 40 ... inner cylinder, 40a ... tip, 41 ... double pipe, 41A ... first pipe body, 41B ... Second tube, 41a ... tip, 50 ... cement kiln, 51 ... rising duct, 52 ... kiln butt, 54 ... burner, 60 ... kiln gas, 62 ... cooling gas, 63, 64 ... bleeding gas, 70 ... preheating calcining Department, 72 ... Temporary combustion furnace, 80 ... Clinker cooler, 100 ... Chlorine bypass equipment, 200 ... Clinker manufacturing equipment.

Claims (8)

It is a cooling gas introduction device that introduces cooling gas along the circumferential direction of the side surface of the bleeding pipe of the chlorine bypass equipment.
The flow path of the cooling gas in the introduction portion of the cooling gas is divided into a plurality of sections along the flow direction of the cooling gas.
A cooling gas introduction device including an adjusting unit configured to be able to adjust at least one of the introduction position and the introduction amount of the cooling gas into the bleeding pipe. The cooling gas introduction device according to claim 1, wherein the adjusting unit individually adjusts the amount of the cooling gas introduced from each flow path formed by being partitioned into a plurality of sections. The cooling gas introduction device according to claim 1 or 2, wherein the adjusting portion includes a shaft body and a member rotatably or swingably attached to the shaft body. It is a cooling gas introduction device that introduces cooling gas along the circumferential direction of the side surface of the bleeding pipe of the chlorine bypass equipment.
The cooling gas introduction portion has an insertion member that is inserted into the cooling gas flow path and is configured to be movable in the throttle portion of the flow path, and the cooling gas introduction position and introduction by the insertion member. A cooling gas introduction device including an adjusting unit configured to be able to adjust at least one of the amounts. A measuring unit that measures at least one operation information selected from the bleeding pipe or a rising duct, a cement kiln, and a kiln tail with which the bleeding pipe communicates, and the adjusting unit based on the operation information measured by the measuring unit. The cooling gas introduction device according to any one of claims 1 to 4, further comprising a control unit that outputs a control signal for adjusting at least one of the introduction position and the introduction amount of the cooling gas. A chlorine bypass facility including the cooling gas introduction device according to any one of claims 1 to 5. A preheated calcined portion, a cement kiln, a rising duct, and a chlorine bypass facility 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 cooling gas introduction device according to any one of claims 1 to 5. 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
It has a cooling step of introducing a cooling gas along the circumferential direction of the side surface of the bleed air pipe of the chlorine bypass equipment to cool the bleed air gas extracted by the bleed air pipe.
A method for producing cement clinker, wherein in the cooling step, the cooling gas is introduced into the bleed air pipe to cool the bleed air gas by using the cooling gas introduction device according to any one of claims 1 to 5.

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