CN218097254U

CN218097254U - Material preheating separator of rotary kiln

Info

Publication number: CN218097254U
Application number: CN202221264229.2U
Authority: CN
Inventors: 田利峰; 肇峰
Original assignee: Liaoyang Tianrui Cement Co ltd
Current assignee: Liaoyang Tianrui Cement Co ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-12-20
Anticipated expiration: 2032-05-25

Abstract

The utility model relates to a rotary kiln material preheating separator, including whirlwind section of thick bamboo, inner tube, air-out pipeline and fan, be equipped with the windy material entry on the whirlwind section of thick bamboo top periphery wall, the bottom of whirlwind section of thick bamboo is equipped with the unloading pipe, and its technical essential is: the cyclone comprises reducing spiral case barrel and the cone of locating reducing spiral case barrel lower extreme, and the diameter of reducing spiral case barrel reduces from top to bottom gradually, and wind material entry is located the tangential position of maximum diameter department, and the cone has erect on the unloading pipe and has pressed down the dirt board, presses down the edge of dirt board and is equipped with many splice bars and the end of splice bar is connected fixedly with the cone, presses down to form annular unloading space between dirt board edge and the cone inner wall, and the lower extreme of unloading pipe is equipped with the flap valve. The utility model provides a current pre-heater cyclone problem that separation efficiency is low, separation efficiency is high, is showing improvement separation efficiency, the energy saving to the life of extension separator fan.

Description

Material preheating separator of rotary kiln

Technical Field

The utility model relates to a cement manufacture equipment technical field, concretely relates to rotary kiln material preheating separator.

Background

The clinker is prepared with limestone, clay and iron material in certain proportion as main material, and through pre-heater dewatering, decomposition, high temperature calcination in rotary kiln, partial or complete smelting and cooling to obtain granular material.

The firing section mainly comprises a preheater system, a rotary kiln system, a grate cooler system and a coal mill system, wherein the preheater system is mainly used for heating raw materials by fully utilizing waste heat of waste gas discharged by the rotary kiln and the decomposing furnace so as to preheat the raw materials and decompose part of carbonate. In order to improve the heat exchange efficiency between gas and solid to the maximum extent and realize the high quality, high yield and low consumption of the whole calcining system, the calcining system has three functions of uniform gas and solid dispersion, rapid heat exchange and high-efficiency separation. The following problems exist in the actual production process: the material firstly enters a secondary preheater uptake flue, and enters a primary preheater cyclone cylinder under the action of system negative pressure, hot gas after gas-material separation enters a next process through a fan, the material enters a secondary cyclone cylinder, but the separation efficiency of the primary cylinder is 90 percent, 10 percent of the material enters the fan along with the gas, the clinker feeding amount per hour is about 400 tons, namely 40 tons of raw materials enter the fan along with the gas every hour, the abrasion to fan blades is very large, and the working of the fan is greatly influenced, so that the rotating speed of the fan is increased and the power consumption is increased. Meanwhile, a large amount of heat raw materials do not enter a preheater system, but enter a fan along with gas, so that a large amount of heat is taken away, and the coal consumption is increased.

Summary of the invention

The utility model aims at providing a simple structure, use reliable rotary kiln material preliminary heat separator, solve the problem that current pre-heater cyclone separation efficiency is low, separation efficiency is high, is showing and is improving separation efficiency, the energy saving to the life of extension separator fan.

The technical scheme of the utility model is that:

the utility model provides a rotary kiln material preliminary heat separator, includes the cyclone, hangs the inner tube that is used for hot air outlet who locates the cyclone top, the air outlet pipeline of being connected with the inner tube outer end, locates the terminal fan of air outlet pipeline, be equipped with the wind material entry on the cyclone top periphery wall, the bottom of cyclone is equipped with the unloading pipe, and its technical essential is: the cyclone comprises a variable-diameter volute barrel and a cone arranged at the lower end of the variable-diameter volute barrel, the diameter of the variable-diameter volute barrel is gradually reduced from top to bottom, an air inlet is located at the tangential position of the maximum diameter, the cone is provided with a dust suppression plate above a discharging pipe, the edge of the dust suppression plate is provided with a plurality of connecting ribs, the tail ends of the connecting ribs are connected and fixed with the cone, an annular discharging space is formed between the edge of the dust suppression plate and the inner wall of the cone, and the lower end of the discharging pipe is provided with a flap valve.

The rotary kiln material preheating separator comprises a variable-diameter volute barrel body, wherein the variable-diameter volute barrel body comprises a rotary barrel section I with the radius of R3325 mm, a rotary barrel section II with the radius of R3440 mm, a rotary barrel section III with the radius of R2895 mm, a rotary barrel section IV with the radius of R2780 mm, a rotary barrel section V with the radius of R2235 mm and a rotary barrel section VI with the radius of R2350mm, the rotary center lines of the rotary barrel section I, the rotary barrel section II, the rotary barrel section V and the rotary barrel section VI are perpendicular lines where dust suppression plate centers are located, the rotary center lines of the rotary barrel section III and the rotary barrel section IV deviate from the center 545mm of the dust suppression plate, and the deviation direction is close to the incoming direction of wind materials.

In the rotary kiln material preheating separator, the dust suppression plate is circular, the upper surface of the dust suppression plate is parallel to the horizontal plane, the outer diameter of the dust suppression plate is 1000mm, the thickness of the dust suppression plate is 160mm, and the distance between the dust suppression plate and the discharging pipe is 2300mm.

According to the rotary kiln material preheating separator, the dust suppression plate is formed by pouring the heat-resistant steel bar framework and the silicon carbide anti-skinning pouring material, so that the rotary kiln material preheating separator is good in heat resistance and long in service life.

According to the rotary kiln material preheating separator, the diameter of the inner cylinder is larger than that of the dust suppression plate, the central vertical pipe is hung in the inner cylinder, a hot air screwing-out channel is formed between the central vertical pipe and the inner cylinder, the lower end of the central vertical pipe is exposed out of the lower port of the inner cylinder and forms a central air inlet, and a spiral climbing groove is formed in the periphery of the central vertical pipe from bottom to top.

According to the rotary kiln material preheating separator, the gate valve is fixed at the outer end of the inner cylinder, so that the ventilation quantity can be adjusted conveniently.

The utility model has the advantages that:

1. the material and hot air enter the cyclone through the air inlet, the hot air and the material rotate at high speed on the inner wall of the cyclone, negative pressure is formed at the inner barrel, namely the hot air outlet, under the action of the fan, so that air and the material are separated, the material enters the discharging pipe, the flap valve is repeatedly opened and closed under the action of the gravity of the material, the material enters the next procedure, and the hot air is discharged from the inner barrel. When the flap valve is opened, part of materials return to the cyclone cylinder under the action of negative pressure, and the returned materials enter the blanking pipe again to be discharged under the blocking of the dust suppression plate and the action of descending materials. Reinforcing gas-solid separation effect reduces the dust content rate 30% among the exhaust hot-blast, and the separation effect improves about 30%, has 40 tons of materials to get into the fan along with the hot-blast for the every hour of traditional separator, the utility model discloses a fan entry reduces about 12 tons of materials, the energy saving.

2. Through setting up central standpipe, the periphery of central standpipe is equipped with spiral groove of climbing, when being favorable to hot-blast climbing, also is favorable to separating the material smugglied secretly among the hot-blast again, has further strengthened the inside gas-solid separation ability of cyclone.

Drawings

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

fig. 2 is a top view of the present invention;

fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.

In the figure: 1. the cyclone comprises a cyclone cylinder, 2. An air inlet, 3. An inner cylinder, 4. A dust suppression plate, 5. A discharging pipe, 6. A flap valve, 7. A fan, 8. A connecting rib, 9. An air outlet pipeline, 10. A gate valve, 11. A central vertical pipe and 12. A spiral climbing groove.

Detailed description of the preferred embodiments

Example 1

As shown in fig. 1 and 2, the rotary kiln material preheating separator comprises a cyclone cylinder 1, an inner cylinder 3 suspended at the top of the cyclone cylinder 1 and used for hot air outlet, an air outlet pipeline 9 connected with the outer end of the inner cylinder 3, and a fan 7 arranged at the tail end of the air outlet pipeline 9. The peripheral wall of the top of the cyclone cylinder 1 is provided with an air inlet 2, and the bottom of the cyclone cylinder 1 is provided with a discharging pipe 5.

The cyclone cylinder 1 is composed of a variable-diameter volute cylinder body and a cone arranged at the lower end of the variable-diameter volute cylinder body. The diameter of the variable-diameter volute barrel is gradually reduced from top to bottom, and the air inlet 2 is located at the tangential position of the maximum diameter. The dust suppression plate 4 is erected above the blanking pipe 5 by the cone, the edge of the dust suppression plate 4 is provided with a plurality of connecting ribs 8, the tail ends of the connecting ribs 8 are fixedly connected with the cone, an annular blanking space is formed between the edge of the dust suppression plate 4 and the inner wall of the cone, and the lower end of the blanking pipe 5 is provided with a flap valve 6.

In this embodiment, the number of the cyclones 1 is two, and the cyclones are symmetrically arranged. The two variable-diameter volute barrels respectively comprise a rotary barrel section I with the radius of R3325 mm, a rotary barrel section II with the radius of R3440 mm, a rotary barrel section III with the radius of R2895 mm, a rotary barrel section IV with the radius of R2780 mm, a rotary barrel section V with the radius of R2235 mm and a rotary barrel section VI with the radius of R2350mm, the rotating center lines of the rotary barrel section I, the rotary barrel section II, the rotary barrel section V and the rotary barrel section VI are perpendicular lines where the centers of a dust suppression plate are located, the rotating center lines of the rotary barrel section III and the rotary barrel section IV deviate from the center 545mm of the dust suppression plate, and the deviation direction is close to the wind direction. The dust suppression plate 4 is circular, the upper surface of the dust suppression plate is parallel to the horizontal plane, the outer diameter of the dust suppression plate 4 is 1000mm, the thickness of the dust suppression plate 4 is 160mm, and the distance between the dust suppression plate 4 and the discharging pipe 5 is 2300mm. The dust suppression plate 4 is formed by pouring a heat-resistant steel bar framework and a silicon carbide anti-skinning pouring material, and has good heat resistance and long service life.

The working principle is as follows:

when hot air carries materials to enter the cyclone cylinder 1, the materials are forced to rotate and flow in an annular space between the inner wall of the cyclone cylinder 1 and the inner cylinder 3, the materials rotate and move downwards at the same time, the materials rotate downwards in the cyclone cylinder 1 to form an outer vortex, then rotate upwards and ascend, fluid rotating upwards forms an inner vortex, and finally the fluid is discharged from the inner cylinder 3. Because the material density is higher than the gas temperature, the speed of the material moving to the edge part is far higher than that of the gas under the action of centrifugal force, so that the concentration near the edge wall is increased, meanwhile, the fluid speed at the edge wall is reduced under the action of viscous resistance, the suspension resistance is greatly reduced, the material is settled to separate the gas, and the material enters the blanking pipe 5. The flap valve 6 is repeatedly opened and closed under the action of the gravity of the material, and the material enters the next procedure. When the flap valve 6 is opened, part of the materials return to the cyclone cylinder 1 under the action of negative pressure, and the materials enter the discharging pipe again under the blocking action of the dust suppression plate 4 and the action of impact and viscous resistance of descending materials, so that the effect of improving the separation efficiency is achieved.

Example 2

As shown in fig. 3, in the rotary kiln material preheating separator, the diameter of the inner cylinder 3 is larger than that of the dust suppression plate 4, a central vertical pipe 11 is suspended in the inner cylinder 3, a hot air screw-out passage is formed between the central vertical pipe 11 and the inner cylinder 3, the lower end of the central vertical pipe 11 is exposed out of the lower port of the inner cylinder 3 and forms a central air inlet, and a spiral climbing groove 12 is formed in the periphery of the central vertical pipe 11 from bottom to top. And a gate valve 10 is fixed at the outer end of the inner barrel 3 so as to adjust the ventilation volume.

The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All the equivalent changes and improvements made according to the scope of the present invention should be covered by the present patent.

Claims

1. The utility model provides a rotary kiln material preliminary heat separator, includes the cyclone, hangs the inner tube that is used for hot-blast export of locating the cyclone top, the air-out pipeline of being connected with the inner tube outer end, locates the terminal fan of air-out pipeline, be equipped with the wind material entry on the cyclone top periphery wall, the bottom of cyclone is equipped with unloading pipe, its characterized in that: the cyclone comprises a variable-diameter volute barrel and a cone arranged at the lower end of the variable-diameter volute barrel, the diameter of the variable-diameter volute barrel is gradually reduced from top to bottom, the air inlet is located at the tangential position of the maximum diameter, the cone is provided with a dust suppression plate above the discharging pipe, the edge of the dust suppression plate is provided with a plurality of connecting ribs, the tail ends of the connecting ribs are fixedly connected with the cone, an annular discharging space is formed between the edge of the dust suppression plate and the inner wall of the cone, and the lower end of the discharging pipe is provided with a flap valve.

2. The rotary kiln material pre-heat separator as claimed in claim 1, wherein: the variable-diameter volute barrel body is composed of a rotary barrel section I with the radius of R3325 mm, a rotary barrel section II with the radius of R3440 mm, a rotary barrel section III with the radius of R2895 mm, a rotary barrel section IV with the radius of R2780 mm, a rotary barrel section V with the radius of R2235 mm and a rotary barrel section VI with the radius of R2350mm, the rotary center lines of the rotary barrel section I, the rotary barrel section II, the rotary barrel section V and the rotary barrel section VI are perpendicular lines where the centers of the dust suppression plate are located, the rotary center lines of the rotary barrel section III and the rotary barrel section IV deviate from the center 545mm of the dust suppression plate, and the deviation direction is close to the incoming direction of wind materials.

3. The rotary kiln material pre-heat separator as claimed in claim 1, wherein: the dust suppression plate is circular, the upper surface of the dust suppression plate is parallel to the horizontal plane, the outer diameter of the dust suppression plate is 1000mm, the thickness of the dust suppression plate is 160mm, and the distance between the dust suppression plate and the discharging pipe is 2300mm.

4. The rotary kiln material pre-heat separator as claimed in claim 1, wherein: the dust suppression plate is formed by pouring a heat-resistant steel bar framework and a silicon carbide anti-skinning pouring material.

5. The rotary kiln material pre-heat separator as claimed in claim 1, wherein: the diameter of the inner cylinder is larger than that of the dust suppression plate, a central vertical pipe is hung in the inner cylinder, a hot air screwing-out channel is formed between the central vertical pipe and the inner cylinder, the lower end of the central vertical pipe is exposed out of the lower port of the inner cylinder and forms a central air inlet, and a spiral climbing groove is formed in the periphery of the central vertical pipe from bottom to top.

6. The rotary kiln material pre-heat separator as claimed in claim 1, wherein: and a gate valve is fixed at the outer end of the inner barrel.