Kiln mouth structure of dry-process cement kiln

Abstract

The utility model provides a dry-process cement kiln mouth structure, which belongs to the technical field of dry-process cement kilns, and comprises a kiln barrel, a cold air sleeve, a connecting sleeve component, an air inlet pipe, an air outlet pipe, an air outlet pipe and an air outlet pipe, and the cold air sleeve is arranged on the radial outer side of a front kiln opening of the kiln barrel and forms a cooling cavity with the outer wall of the kiln barrel. The connecting sleeve assembly is arranged on the radial outer side of the cold air sleeve; the air bellow is arranged on the radial outer side of the kiln barrel, the air bellow communicates with the cooling cavity, and the air bellow is in butt joint with the end, away from the cold air sleeve, of the connecting sleeve assembly; the multiple cold air sleeve exhaust ports are formed in the side wall of the air bellow and used for exhausting hot air flow in the cold air sleeve; the air box is provided with a plurality of air outlets of the cold air sleeve, and the cooling air duct is arranged at the inner side barrel body of the fish scale part of the edge opening of the cold air sleeve, so that the temperature of the front kiln opening barrel body is effectively reduced by utilizing the air outlets and the cooling air duct, and the normal work of the kiln barrel body is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to dry cement kiln technical field, concretely relates to a dry cement kiln mouth structure. BACKGROUND

[0002] Cement rotary kiln is mainly used for calcining cement clinker, and is divided into dry cement rotary kiln and wet cement rotary kiln two categories. Dry cement kiln structure is advanced, and good sealing, and sealing device is arranged at the kiln head and the kiln tail, can effectively guarantee the reliable sealing of kiln body, avoids heat loss.

[0003] The existing dry cement rotary kiln head sealing device designs an air outlet at the top of the cold air casing box, and cold air is blown into the cold air casing by the external centrifugal fan, and the hot air is taken away by the air outlet at the top of the cold air casing box, which continuously reduces the temperature of the front end of the kiln cylinder and protects the kiln cylinder. However, the existing cold air casing box top only sets an air outlet, and the amount of hot air taken away is small, which brings risk to the high temperature of the kiln mouth cylinder, and at the same time, the inner side cylinder of the cold air casing along the fish scale piece part is easy to be high temperature, so the fish scale piece is damaged, resulting in the decline of sealing effect. SUMMARY

[0004] The utility model provides a kind of dry cement kiln mouth structure, by being provided with multiple top cold air casing exhaust port on wind box, and being provided with cooling air duct at the inner side cylinder of cold air casing along fish scale part, utilize both to effectively reduce the temperature of front kiln mouth cylinder, to guarantee kiln cylinder normal work.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A kind of dry cement kiln mouth structure, including kiln cylinder and the cold air casing being set in the radial outer side of kiln cylinder front kiln mouth and forming cooling chamber with the outer wall of kiln cylinder, further comprising:

[0007] Connecting sleeve assembly, the connecting sleeve assembly is set in the radial outer side of cold air casing;

[0008] Wind box, the wind box is set in the radial outer side of kiln cylinder, the wind box is communicated with cooling chamber setting, and the wind box is butted with the end of connecting sleeve assembly away from cold air casing;And

[0009] Cold air casing exhaust port, the cold air casing exhaust port is set in multiple for the wind box side wall, for discharging hot gas flow in cold air casing.

[0010] Preferably, the dry cement kiln mouth structure further includes cooling air duct, the inlet of the cooling air duct is circumscribed with centrifugal fan air duct, and the outlet of the cooling air duct faces the kiln cylinder.

[0011] Preferably, the kiln cylinder front kiln mouth end is fixed with a sheath, and the cold air sheath is fixed outside the kiln cylinder through the sheath.

[0012] Preferably, the connecting sleeve assembly comprises a front material blocking flange arranged on the radial outer wall of the cold air sheath, a first connecting sleeve arranged on the radial outer wall of the front material blocking flange, and a second connecting sleeve arranged on the radial outer wall of the cold air sheath and connected with the first connecting sleeve, and the end of the second connecting sleeve away from the first connecting sleeve is connected with the wind box.

[0013] Preferably, the connecting sleeve assembly further comprises a forward fish scale arranged between the radial outer side of the cold air sheath and the radial outer side of the front material blocking flange, and a reverse fish scale arranged between the radial outer side of the kiln cylinder and the radial inner side of the wind box.

[0014] Preferably, the radial outer side of the kiln cylinder is further provided with a friction sleeve matched with the reverse fish scale.

[0015] Preferably, the wind box is an annular box structure arranged on the outer wall of the kiln cylinder.

[0016] Preferably, the bottom of the cold air sheath is further provided with a material receiving hopper.

[0017] Preferably, the cold air sheath exhaust port comprises a pipe body connected with the wind box and a baffle arranged on the top air outlet of the pipe body.

[0018] Preferably, the inner wall of the pipe body is provided with alternately distributed material blocking plates.

[0019] According to the above technical scheme, the present application has the following beneficial effects:

[0020] 1. In the present application, multiple top exhaust ports can be arranged on the top of the wind box according to the power and air volume of the kiln mouth cold air sheath centrifugal fan, and an external centrifugal fan is used to blow cold air into the cold air sheath, so that the hot air at the position of the kiln cylinder front kiln mouth is taken away during the flow of the cold air in the cooling chamber, and finally discharged through the cold air sheath exhaust port of the wind box side wall, thereby reducing the temperature of the kiln cylinder in the kiln mouth cold air sheath. Since the number of cold air sheath exhaust ports is multiple, the discharge amount of hot air flow in the kiln mouth cold air sheath can be increased, and the cooling effect on the kiln cylinder is enhanced, so as to protect the kiln mouth refractory brick, the kiln mouth sheath and the kiln cylinder.

[0021] 2. In the present application, the cooling air duct of the centrifugal fan is connected with the inner cylinder of the cold air sheath along the kiln mouth fish scale part, so that the cooling air generated by the centrifugal fan can be blown to the kiln cylinder to reduce the temperature of the cold air sheath along the kiln mouth fish scale part. In this way, the cold air sheath exhaust port can be combined to enhance the temperature reduction effect on the front kiln mouth cylinder, so as to ensure the normal operation of the kiln cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1The dry-process cement kiln mouth structure provided by the utility model has the advantages that the kiln mouth cooling device is provided with the cooling cavity, the cooling cavity is formed between the outer wall of the kiln cylinder and the inner wall of the cold air jacket, and the cooling cavity is communicated with the air bellow.

[0023] Figure 2 The utility model discloses a dry-process cement kiln mouth structure, which has the advantages that the kiln mouth cooling device is provided with the cooling cavity, the cooling cavity is formed between the outer wall of the kiln cylinder and the inner wall of the cold air jacket, and the cooling cavity is communicated with the air bellow. Figure 1 The utility model discloses a dry-process cement kiln mouth structure, which has the advantages that the kiln mouth cooling device is provided with the cooling cavity, the cooling cavity is formed between the outer wall of the kiln cylinder and the inner wall of the cold air jacket, and the cooling cavity is communicated with the air bellow. The utility model discloses a dry-process cement kiln mouth structure, which has the advantages that the kiln mouth cooling device is provided with the cooling cavity, the cooling cavity is formed between the outer wall of the kiln cylinder and the inner wall of the cold air jacket, and the cooling cavity is communicated with the air bellow.

[0024] The utility model discloses a dry-process cement kiln mouth structure, which has the advantages that the kiln mouth cooling device is provided with the cooling cavity, the cooling cavity is formed between the outer wall of the kiln cylinder and the inner wall of the cold air jacket, and the cooling cavity is communicated with the air bellow. Figure 3 The utility model discloses a dry-process cement kiln mouth structure, which has the advantages that the kiln mouth cooling device is provided with the cooling cavity, the cooling cavity is formed between the outer wall of the kiln cylinder and the inner wall of the cold air jacket, and the cooling cavity is communicated with the air bellow. Figure 1 The utility model discloses a dry-process cement kiln mouth structure, which has the advantages that the kiln mouth cooling device is provided with the cooling cavity, the cooling cavity is formed between the outer wall of the kiln cylinder and the inner wall of the cold air jacket, and the cooling cavity is communicated with the air bellow. The utility model discloses a dry-process cement kiln mouth structure, which has the advantages that the kiln mouth cooling device is provided with the cooling cavity, the cooling cavity is formed between the outer wall of the kiln cylinder and the inner wall of the cold air jacket, and the cooling cavity is communicated with the air bellow.

[0025] The utility model discloses a dry-process cement kiln mouth structure, which has the advantages that the kiln mouth cooling device is provided with the cooling cavity, the cooling cavity is formed between the outer wall of the kiln cylinder and the inner wall of the cold air jacket, and the cooling cavity is communicated with the air bellow. Figure 4 The utility model discloses a dry-process cement kiln mouth structure, which has the advantages that the kiln mouth cooling device is provided with the cooling cavity, the cooling cavity is formed between the outer wall of the kiln cylinder and the inner wall of the cold air jacket, and the cooling cavity is communicated with the air bellow. The utility model discloses a dry-process cement kiln mouth structure, which has the advantages that the kiln mouth cooling device is provided with the cooling cavity, the cooling cavity is formed between the outer wall of the kiln cylinder and the inner wall of the cold air jacket, and the cooling cavity is communicated with the air bellow.

[0026] In the figure: 10, kiln cylinder; 110, sheath; 20, cold air jacket; 310, front material blocking flange; 320, first connecting sleeve; 330, second connecting sleeve; 340, forward fish scale; 350, reverse fish scale; 360, friction sleeve; 40, air bellow; 50, cold air jacket exhaust port; 510, pipe body; 520, material blocking plate; 60, cooling air duct; 70, material receiving hopper. Specific implementation

[0027] The preferred embodiment of the utility model will be described in detail below with reference to the drawings.

[0028] To achieve the above object, the embodiment of the utility model adopts the following technical scheme: referring to Figure 1 , Figure 2 , Figure 3 , a dry-process cement kiln mouth structure, which comprises a kiln cylinder 10 and a cold air jacket 20, the cold air jacket 20 is arranged on the radial outer side of the front kiln mouth of the kiln cylinder, and a cooling cavity is formed between the inner side of the cold air jacket and the outer wall of the kiln cylinder, further, the dry-process cement kiln mouth structure further comprises a connecting sleeve assembly, an air bellow 40 and a cold air jacket exhaust port 50, the connecting sleeve assembly is arranged on the radial outer side of the cold air jacket 20, the air bellow 40 is arranged on the radial outer side of the kiln cylinder 10, the air bellow is arranged in communication with the cooling cavity, and the air bellow 40 is in butt joint with the end of the connecting sleeve assembly far away from the cold air jacket 20, the cold air jacket exhaust port is a plurality of cold air jacket exhaust ports arranged on the side wall of the air bellow 40, which is used for discharging the hot air flow in the cold air jacket 20, in use, according to the power of the centrifugal fan of the kiln mouth cold air jacket and the air volume of the air bellow, a plurality of cold air jacket exhaust ports are arranged on the top of the air bellow, the external centrifugal fan is used to blow cold air into the cold air jacket, and the cold air carries away the hot air at the position of the front kiln mouth of the kiln cylinder in the process of flowing along the aforementioned cooling cavity, and finally is discharged through the cold air jacket exhaust ports on the side wall of the air bellow, so that the temperature of the kiln cylinder in the kiln mouth cold air jacket is reduced, since the number of the cold air jacket exhaust ports is multiple, the discharge amount of the hot air flow in the kiln mouth cold air jacket can be increased, and the cooling effect on the kiln cylinder is enhanced, so as to protect the kiln mouth refractory brick, the kiln mouth sheath and the kiln cylinder.

[0029] Referring to Figure 1, as the preferred technical scheme of the embodiment, the dry cement kiln mouth structure further comprises a cooling air duct 60, the air inlet of the cooling air duct is connected with the air duct of the centrifugal fan, the air outlet of the cooling air duct is directed to the kiln cylinder 10, and the air outlet of the cooling air duct is made into a duckbill type air outlet and is aligned with the inner side of the cylinder at the fish scale part of the cold air sleeve to reduce the temperature of the cylinder at this part, so as to solve the problem that the temperature of the inner side of the cylinder at the outer edge of the cold air sleeve of the existing kiln mouth is high during daily operation, and ensure that the temperature of the kiln mouth is not easy to be high. In the embodiment, the inner diameter of the cooling air duct is 105 mm, so that the cooling air duct cooperates with the exhaust ports of the plurality of cold air sleeves to effectively reduce the temperature of the front kiln mouth cylinder.

[0030] Further, the kiln cylinder 10 is provided with a sheath 110 at the front kiln mouth end, the sheath is made of iron, and the cold air sleeve 20 is fixedly arranged outside the kiln cylinder 10 by the sheath.

[0031] Referring to Figure 3 In some embodiments, the connecting sleeve assembly comprises a front material blocking flange 310, a first connecting sleeve 320 and a second connecting sleeve 330, the front material blocking flange 310 is arranged on the radial outer wall of the cold air sleeve 20, the first connecting sleeve 320 is arranged on the radial outer wall of the front material blocking flange, the second connecting sleeve 330 is arranged on the radial outer wall of the cold air sleeve 20, and the second connecting sleeve 330 is arranged in abutment with the first connecting sleeve 320, and the end of the second connecting sleeve away from the first connecting sleeve 320 is in abutment with the air bellow 40. In this way, the front material blocking flange, the first connecting sleeve and the second connecting sleeve in the connecting sleeve assembly cooperate with the air bellow to form a cover structure on the radial outer wall of the cold air sleeve, which covers the outside of the cold air sleeve. A certain volume of cavity is formed between the inner wall of the cover structure and the outer wall of the cold air sleeve. When the centrifugal fan blows cold air into the cold air sleeve, the cold air flows through the cooling chamber and the aforementioned cavity in sequence and is finally discharged through the exhaust port of the cold air sleeve. In this way, the hot gas flow in the kiln cylinder can be discharged during the flow of the cold air, achieving the effect of cooling.

[0032] Further, in order to improve the sealing performance of the connecting sleeve assembly and the outer wall of the kiln cylinder, the connecting sleeve assembly further comprises a forward fish scale 340 and a reverse fish scale 350, the forward fish scale 340 is arranged between the radial outer side of the cold air sleeve 20 and the radial outer side of the front material blocking flange 310, and the reverse fish scale 350 is arranged between the radial outer side of the kiln cylinder 10 and the radial inner side of the air bellow 40. In this way, the forward fish scale realizes the sealing between the front material blocking flange and the cold air sleeve, and the reverse fish scale realizes the sealing between the air bellow and the kiln cylinder, so as to improve the sealing effect between the connecting sleeve assembly, the air bellow and the kiln cylinder.

[0033] Further, the kiln cylinder 10 radially outer side is also provided with a friction sleeve 360 matched with the reverse fish scale 350, the presence of the friction sleeve can enhance the connection effect of the reverse fish scale and the outer wall of the kiln cylinder, to further improve the sealing effect of the wind box and the kiln cylinder connection.

[0034] Further, the wind box 40 is an annular box structure placed on the outer wall of the kiln cylinder 10, which is placed on the outer wall of the top of the kiln cylinder, so that when the cooling air is blown into the cooling air sleeve by the centrifugal fan, it can be sequentially transported to the wind box through the cooling chamber and the cavity, and finally discharged through the cooling air sleeve exhaust port, so as to cool the front kiln port position of the kiln cylinder through the cooling air flow process.

[0035] In some embodiments, the bottom of the cooling air sleeve 20 is also provided with a material receiving hopper 70, which facilitates the reception of material ash existing in the inner side of the cooling air sleeve and the inner side of the connecting sleeve assembly, to facilitate subsequent processing.

[0036] In another embodiment, referring to Figure 4 , the cooling air sleeve exhaust port 50 includes a pipe body 510 and a baffle, the pipe body 510 is in communication with the wind box 40, and the baffle is arranged at the top of the pipe body. Further, the inner wall of the pipe body 510 is provided with alternately distributed material blocking plates 520. During operation, the cooling air is transported to the pipe body through the wind box, and after being blocked and transmitted by the baffle, the material ash in the airflow is hindered to fall, and the remaining airflow is discharged through the pipe body exhaust port.

[0037] In use, according to the power and air volume of the centrifugal fan of the kiln port cooling air sleeve 20, three top cooling air sleeve exhaust ports 50 are arranged at the top of the wind box 40, and the cooling air is blown into the cooling air sleeve by the external centrifugal fan. The cooling air carries away the hot air at the front kiln port position of the kiln cylinder during the flow process in the cooling chamber of the cooling air sleeve, and then flows along the cavity inside the connecting sleeve assembly, and then flows into the wind box, and finally is discharged through the cooling air sleeve exhaust port of the wind box side wall. In this way, the cooling air can reduce the temperature of the kiln cylinder in the kiln port cooling air sleeve during the flow process along the above-mentioned path. Since the number of cooling air sleeve exhaust ports is multiple, the discharge amount of hot airflow in the kiln port cooling air sleeve can be increased, and the cooling effect on the kiln cylinder can be enhanced to protect the kiln port refractory brick, the kiln port sleeve and the kiln cylinder. In addition, the cooling air duct extending to the inner cylinder of the cooling air sleeve along the kiln port fish scale position is connected to the air duct of the centrifugal fan, so that when the cooling air generated by the centrifugal fan blows to the kiln cylinder, the temperature of the cooling air sleeve along the kiln port fish scale position can be reduced. In this way, the cooling air sleeve exhaust port can be combined to enhance the temperature reduction effect on the front kiln port cylinder, and ensure the normal operation of the kiln cylinder.

[0038] The above described embodiments are merely preferred embodiments of the present application, and are not intended to limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those of ordinary skill in the art shall fall within the protection scope of the present application as defined by the claims.

Claims

1. A dry cement kiln mouth structure comprising a kiln barrel (10) and a cold air jacket (20) arranged radially outside the kiln mouth and forming a cooling chamber with the outer wall of the kiln barrel, characterized in that, Also included are: a connecting sleeve assembly arranged radially outside the cold air sleeve (20); a wind box (40) arranged radially outside the kiln cylinder (10), the wind box being arranged in communication with the cooling chamber, and the wind box (40) being in abutment with one end of the connecting sleeve assembly away from the cold air sleeve (20); and a cold air sleeve exhaust port (50) arranged in multiple on the side wall of the wind box (40) for discharging hot gas flow in the cold air sleeve (20).

2. The dry process cement kiln port structure of claim 1 wherein, The dry-process cement kiln mouth structure further comprises a cooling air duct (60), and a centrifugal fan air duct is circumscribed to the air inlet of the cooling air duct, and the air outlet of the cooling air duct is directed towards the kiln cylinder (10).

3. The dry process cement kiln port structure of claim 1 wherein, The kiln cylinder (10) is fixedly provided with a sheath (110) at the front kiln mouth end, and the cold air sleeve (20) is fixedly arranged outside the kiln cylinder (10) through the sheath.

4. The dry process cement kiln port structure of claim 1 wherein, The connecting sleeve assembly comprises a front material blocking flange (310) arranged on the radial outer wall of the cold air sleeve (20), a first connecting sleeve (320) arranged on the radial outer wall of the front material blocking flange, and a second connecting sleeve (330) arranged on the radial outer wall of the cold air sleeve (20) and in abutment with the first connecting sleeve, and one end of the second connecting sleeve away from the first connecting sleeve (320) is in abutment with the wind box (40).

5. A dry process cement kiln port structure according to claim 4, wherein, The connecting sleeve assembly further comprises a forward fish scale (340) arranged between the radial outer side of the cold air sleeve (20) and the radial outer side of the front material blocking flange (310), and a reverse fish scale (350) arranged between the radial outer side of the kiln cylinder (10) and the radial inner side of the wind box (40).

6. A dry process cement kiln port structure according to claim 5, wherein, The radial outer side of the kiln cylinder (10) is further provided with a friction sleeve (360) matched with the reverse fish scale (350).

7. The dry cement kiln port structure of claim 1 wherein, The wind box (40) is an annular box structure arranged on the outer wall of the kiln cylinder (10).

8. A dry process cement kiln port structure according to claim 7, characterised in that, The bottom of the cold air sleeve (20) is further provided with a material receiving hopper (70).

9. The dry cement kiln port structure of claim 1 wherein, The cold air sleeve exhaust port (50) comprises a pipe body (510) arranged in communication with the wind box (40), and a baffle arranged at the air outlet on the top of the pipe body.

10. A dry process cement kiln port structure according to claim 9, wherein, The inner wall of the pipe body (510) is provided with alternately distributed material blocking plates (520).

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