CN217358001U

CN217358001U - Rotary cement kiln with good airtight effect

Info

Publication number: CN217358001U
Application number: CN202122650573.7U
Authority: CN
Inventors: 杨利文
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-09-02
Anticipated expiration: 2031-11-02

Abstract

The utility model relates to a cement rotary kiln with good airtight effect, which utilizes a kiln head cover, a sealing cover, a first fish scale ring and an anti-corrosion high-temperature-resistant flexible sealing retaining ring to form a complete first flexible sealing structure, the sealing cover, a second fish scale ring and a wear-resistant sleeve form a second sealing structure, and the two sealing structures are combined to thoroughly solve the problem of dust escape; an exhaust device is added to discharge a large amount of cold air blown out by the cooling fan, so that the cold air blown out by the cooling fan is prevented from being discharged in a sealing cover without clearance, a large amount of cold air enters the rotary kiln along with the negative pressure operation of the rotary kiln to cause influence on the process operation, and the negative pressure or micro negative pressure operation in the rotary kiln is ensured; the high-temperature glass observation door is designed to observe the operation conditions of other devices in the sealing cover at any time, so that the safety guarantee is provided for production. The utility model discloses a fundamentally solves rotary cement kiln head problem that leaks out, leaks the material, reduces coal consumption to a certain extent, reduces the powder and spills, reduces the raise dust of cement kiln factory, improves factory sanitary environment, reduces cleaner production's maintenance cost.

Description

Rotary cement kiln with good airtight effect

Technical Field

The utility model relates to a cement technology field specifically is a cement rotary kiln with good airtight effect.

Background

The cement rotary kiln is a device for calcining cement raw materials into clinker, raw material powder is added at the kiln tail of the rotary kiln, fuel oil or coal powder is blown into the kiln at the kiln head, the formed flame flows to the kiln tail, so that the raw material powder which rolls along the circumferential direction and moves from the kiln tail to the kiln head along the axial line is heated and calcined in the moving process, and finally the calcined clinker is discharged from the kiln head. The rotary cement kiln consists of mainly combustor, kiln hood, cylinder, support mechanism, large gear ring, transmission unit, smoke chamber and kiln tail. The rotary cement kiln has large overall dimension, the diameter can reach 6 meters, the length is about 200 meters, the weight is nearly thousand tons, a main body is a cylinder body rolled by a steel plate, a fireproof material is built in the cylinder body, the cylinder body is inclined at a certain angle and is arranged on a plurality of pairs of riding wheels, and the cylinder body is driven by a transmission device to rotate at a low speed. The structure form of the kiln head seal of the existing rotary kiln is relatively backward, the sealing effect is relatively poor, and the kiln head seal structure has the phenomena of air leakage and material leakage in different degrees. The secondary air temperature is seriously lost due to air leakage of the kiln head of the rotary kiln, a large amount of flying sand appears at the sealing part of the kiln head when the negative pressure fluctuation is large, clinker particles are scattered from the sealing part in the production process, a large amount of dust covers the periphery of hundreds of square meters on site, the pollution is serious, and a large amount of manpower and material resources are needed to be spent to keep the cleanness. The flying sand material can also enter the joint of a first-gear tugboat of the rotary kiln, an air inlet of a fan and other parts, so that the equipment is abraded, and the service life of the equipment is shortened; in addition, the flying sand material can be mixed into the lubricating oil of the first retaining roller, so that the lubricating failure is caused, the high-temperature phenomenon of the roller shoe is caused, and the service life of other equipment is further influenced. In order to avoid serious consequences caused by material leakage and air leakage of the equipment, the loss caused by improper sealing of the kiln head of the rotary cement kiln needs to be fundamentally eliminated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rotary kiln with good airtight effect to the drawback of current cement rotary kiln head sealing technique, it can fundamentally solve the problem that cement rotary kiln head leaks out, leaks the material, reduces coal consumption to a certain extent, reduces the powder and spills, reduces the raise dust of cement kiln factory, improves factory sanitary environment, reduces cleaner production's maintenance cost.

The problem of the utility model is solved with following technical scheme:

a cement rotary kiln with good sealing effect comprises a kiln head, a cylinder body, a kiln tail, a supporting mechanism and a driving mechanism, wherein the kiln head is provided with a kiln head cover, the kiln head cover is a cavity with an opening at one end, and the kiln head cover are connected into a whole at the opening; a flexible sealing ring is arranged in the front end of the sealing cover, one end of the first fish scale ring is fixed on the cold air sleeve, the other end of the first fish scale ring is pressed on the inner wall of the flexible sealing ring in a contact mode, and a first-stage seal is formed between the first fish scale ring and the inner wall of the flexible sealing ring.

2. The rotary cement kiln with the good sealing effect is characterized in that the flexible sealing ring is a cylinder with a taper of 25-35 degrees, the outer wall of the flexible sealing ring is fixed with the middle section of the sealing cover through the inner partition plate, and the flexible sealing ring is coated with the wear-resistant layer.

3. Foretell rotary cement kiln with good airtight effect, first fish scale ring is formed by a plurality of fish scale overlap joints, and adjacent fish scale overlap joint area is one tenth of fish scale area, and the fish scale is fixed in proper order on the outer wall of cold wind cover, and the cold wind cover is the awl tube-shape of outside expansion, and the contained angle of awl tube outer wall and fish scale is 12 for alpha, and the tip of fish scale dabs on the wearing layer of sealing ring.

4. The rotary cement kiln with the good sealing effect is additionally provided with the air outlet which is fixed on the middle section of the sealing cover, and the middle section of the sealing cover is fixed on the front end of the sealing cover through the flange; the air outlet comprises an air exhaust cylinder and a heat-resistant steel dust screen, wherein the lower half part of the air exhaust cylinder is in a circular drum shape, the upper end surface and the lower end surface of the air exhaust cylinder are respectively provided with the heat-resistant steel dust screen, and the air outlet is connected with the dust collection fan.

5. Foretell cement rotary kiln with good airtight effect adds and constitutes the second grade between sealed cowling middle section, the sealed cowling tail end, the second fish scale ring sum the stainless steel wear-resisting cover sealed, the one end in sealed cowling middle section and the one end of sealed cowling tail end are passed through the ring flange and are fixed together, second fish scale ring one end is established on the sealed cowling tail end, is pressed the fastening by the fixed ring and decides, and the second fish scale ring is together fixed with solid fixed ring, touches with the wear-resisting cover excircle of stainless steel and presses, the wear-resisting cover welding of stainless steel is on the rotary kiln barrel.

6. Foretell rotary cement kiln with good airtight effect adds the afterbody of mounting bracket setting at the sealed cowling tail end in the observation window constitution, and the built-in flashboard of mounting bracket, the external glass observation door of mounting bracket.

7. The cement rotary kiln with the good sealing effect is additionally provided with the ash return hopper which is welded on the middle section of the sealing cover.

8. The rotary cement kiln with the good sealing effect is additionally provided with the bidirectional cooling air pipe and welded on the middle section of the sealing cover.

Advantageous effects

The utility model utilizes the kiln hood cover, the sealing cover, the first fish scale ring and the anti-corrosion high temperature resistant flexible sealing baffle ring to form a complete first flexible sealing structure, the sealing cover, the second fish scale ring and the wear-resistant sleeve form a second sealing structure, the two sealing structures are combined, one sealing insurance is provided for the equipment, and the problem of dust escape is thoroughly solved; an air exhaust device is added to exhaust a large amount of cold air blown out by a cooling fan, so that the cold air blown out by the air cooler is prevented from being exhausted in a sealing cover without clearance, the large amount of cold air enters the rotary kiln along with the negative pressure operation of the rotary kiln to cause the influence on the process operation, and the negative pressure or micro negative pressure operation in the rotary kiln is ensured; the high-temperature glass observation door is designed to observe the operation conditions of other devices in the sealing cover at any time, so that the safety guarantee is provided for production.

Drawings

The present invention will be described in detail with reference to fig. 1.

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic diagram of a first fish scale ring structure:

fig. 3 is a left side view of fig. 2:

in the drawings, the reference numerals denote: 1. kiln hood, 2, rotary kiln barrel, 3, cold wind cover, 4, sealed cowling front end, 5, sealed cowling middle section, 6, sealed cowling tail end, 7, exhaust barrel, 8, heat-resisting steel dust screen, 9, flexible sealing ring, 10, first fish scale ring, 11, second fish scale ring, 12, return ash fill, 13, two-way cooling tuber pipe, 14, the wear-resisting cover of stainless steel, 15, the wearing layer, 16, the fish scale, 17, the mounting bracket, 18, the flashboard, 19, the glass observation door, 20, solid fixed ring.

Detailed Description

The utility model provides a rotary cement kiln with good airtight effect, the utility model discloses can fundamentally solve the sealed problem of leaking out, leaking the material of rotary cement kiln hood. The rotary kiln device of the good sealed effect of this patent design is realized through inside seal and outside seal twice device, it mainly by the kiln hood cover, the rotary kiln barrel, the cold wind cover, the sealed cowling front end, the sealed cowling middle section, the sealed cowling tail end, the exhaust section of thick bamboo, heat-resisting steel dust screen, flexible seal fender ring, the fish scale ring, return the ash bucket, two-way cooling air pipe, the wear-resisting cover of stainless steel, the bolt, the nut, the mounting bracket, the flashboard, high temperature glass observation door, the solid fixed ring of fish scale ring, the screw, constitution such as sealing ring.

Referring to fig. 1, the rotary kiln with good sealing effect comprises a first seal and a second seal, wherein the first seal is formed by arranging a flexible sealing baffle ring on a sealing ring at the middle section of a sealing cover, and a first fish scale ring is overlapped and circumferentially arranged on a cold air sleeve and is fastened by screws one by one. Fly sand material by being blown to the flexible seal under the state of kiln head malleation and keep off the position department of ring, fly sand material under the guide of flexible seal fender ring, the wind of area material forms a high-speed vortex field in the confined space, and the material strikes each other in succession, loses kinetic energy, under the action of gravity, is caught one by first sealing device one by one, gets into the cold machine of comb through arranging the material pipe, and very few dust can break through first flexible seal in succession, enters into fish scale ring position.

The second is sealed covers on the kiln head through the kiln head cover, sealed front end one end and the welding of kiln head cover, the other end and the riveting of sealed middle section, the other end in sealed middle section and the one end riveting of sealed tail end, second fish scale ring stack border sets up at the sealed afterbody, the one end of second fish scale ring is compressed tightly by the solid fixed ring of fish scale ring and is fixed on the sealed tail end through the screw one by one, the other end is compressed tightly by the solid fixed ring of fish scale ring equally, by the fix with screw, form the second and say sealing device, live with the sealed a small amount of dust that first sealing device leaked.

In the production operation process of the rotary cement kiln, in order to ensure that the operation conditions of other equipment in the sealing cover cannot be observed at any time during production operation and the problem that the cold air jacket and the kiln mouth iron protector cannot be visually inspected during operation of the rotary kiln after installation due to the sealed flexible seal, a glass observation door parallel to the rotary kiln cylinder body is arranged, and the operation use conditions of the cold air jacket and the kiln mouth iron protector during operation of the rotary kiln can be observed at any time.

In the production operation process of the rotary cement kiln, cooling air blown out by a cooling fan cannot be discharged, a large amount of cold air enters the kiln, and because the inside of a sealing cover is in a positive pressure state and the inside of the rotary kiln is in negative pressure or micro negative pressure operation in sealed flexible sealing operation, in order to prevent the cooling air blown out by the cooling fan from being discharged in the sealing cover without gaps, a large amount of cold air enters the rotary kiln along with the negative pressure operation of the rotary kiln to influence the process operation, an air exhaust system is additionally arranged, and the problem that the cooling air in the sealing cover cannot be discharged is solved.

Claims

1. A cement rotary kiln with a good sealing effect comprises a kiln head, a cylinder body, a kiln tail, a supporting mechanism and a driving mechanism, wherein the kiln head is provided with a kiln head cover, the kiln head cover is a cavity with an opening at one end, and the kiln head cover are connected into a whole at the opening; be equipped with flexible sealing ring (9) in sealed cowling front end (4), first fish scale ring (10) one end is fixed on the cold wind cover, and the other end touches and presses on the inner wall of flexible sealing ring (9), constitutes first order sealedly between the two.

2. The rotary cement kiln with a good sealing effect as claimed in claim 1, wherein: the flexible sealing ring (9) is a hollow cylinder with a taper of 25-35 degrees, the outer wall of the flexible sealing ring is fixed with the middle section (5) of the sealing cover through an inner partition plate, and the flexible sealing ring (9) is coated with a wear-resistant layer (15).

3. The rotary cement kiln with a good sealing effect as claimed in claim 1, wherein: first fish scale ring (10) are formed by a plurality of fish scale (16) overlap joint, and adjacent fish scale (16) overlap joint area is one tenth of fish scale (16) area, and fish scale (16) are fixed in proper order on the outer wall of cold wind cover (3), and cold wind cover (3) are the awl tube-shape of outside expansion, and the contained angle of awl tube outer wall and fish scale (16) is 12 for alpha, and the tip of fish scale (16) dabs on wearing layer (15) of sealing ring (9).

4. The rotary cement kiln with a good sealing effect as claimed in claim 1, wherein: an air outlet is additionally arranged and fixed on the middle section (5) of the sealing cover, and the middle section (5) of the sealing cover is fixed on the front end (4) of the sealing cover through a flange; the air outlet comprises an air exhaust barrel (7) and a heat-resistant steel dust screen (8), wherein the lower half part of the air exhaust barrel (7) is in a circular drum shape, the upper end surface and the lower end surface of the air exhaust barrel are respectively provided with the heat-resistant steel dust screen (8), and the air outlet is connected with the dust collection fan.

5. The rotary cement kiln with a good sealing effect as claimed in claim 1, wherein: add and constitute the second grade between sealed cowling middle section (5), sealed cowling tail end (6), second fish scale ring (11) and the stainless steel wear-resisting cover sealed, the one end of sealed cowling middle section (5) and the one end of sealed cowling tail end (6) are passed through the ring flange and are fixed together, second fish scale ring (11) one end is established on sealed cowling tail end (6), is pressed the fastening by the retaining ring and is decided, and second fish scale ring (11) are fixed together with solid fixed ring (20), touch with the wear-resisting cover of stainless steel (14) excircle and press, the wear-resisting cover of stainless steel (14) welding is on rotary kiln barrel (2).

6. The rotary cement kiln with good sealing effect as claimed in claim 1, wherein: the installation frame (17) is arranged at the tail part of the tail end (6) of the sealing cover in the structure of additionally arranging the observation window, the flashboard (18) is arranged in the installation frame (17), and the glass observation door (19) is arranged outside the installation frame (17).

7. The rotary cement kiln with good sealing effect as claimed in claim 1, wherein: an ash return hopper (12) is additionally arranged and welded on the middle section (5) of the sealing cover.

8. The rotary cement kiln with a good sealing effect as claimed in claim 1, wherein: and a bidirectional cooling air pipe (13) is additionally arranged and welded on the middle section (5) of the sealing cover.