CN217442218U - Large rotary kiln system - Google Patents

Abstract

The utility model relates to a large-scale rotary kiln system, which comprises a rotary kiln, a preheater system, a material sliding vehicle and a material cooling system; the rotary kiln is provided with two bearings; the preheater system comprises a material distribution bin, a preheater body and a material pushing system; a material sliding vehicle is arranged between a feed opening at the bottom of the preheater system and the inlet of the rotary kiln; the top of the material cooling system is connected with the outlet of the rotary kiln, the bottom of the material cooling system is provided with a discharge port, and the material cooling system is internally provided with a cooler with an external air chamber. The utility model is used for calcining active lime or light calcined dolomite; the large rotary kiln with two-gear support is taken as core equipment, a preheater system is arranged at the front end of the system, a material cooling system is arranged at the rear end of the system, and other related supporting equipment is added to form a large rotary kiln system; as an advanced technology for leading the green development of the steel industry, the method has obvious comprehensive benefits and advantages in the aspects of improving the resource utilization rate, improving the lime quality, saving energy and the like.

Description

Large rotary kiln system

Technical Field

The utility model relates to a rotary kiln technical field especially relates to a large-scale rotary kiln system.

Background

The active lime is an important auxiliary material for industrial production, and is widely applied to various industries such as chemical industry, calcium carbide, alumina, papermaking, environmental protection and the like. The active lime produced by the rotary kiln has the characteristics of uniform calcination, stable product quality and the like. From the 70 th century to the beginning of the century, the lime rotary kiln production line in China is limited to a few large-scale steel enterprises, but the total energy ratio is low, the single kiln yield is low, and the scale benefit is difficult to form. Therefore, the development of a large-scale lime rotary kiln system is urgently needed.

The utility model provides a large-scale rotary kiln system of two shelves supporting for calcine active lime or light-burned dolomite, have many-sided comprehensive benefits and advantages such as promotion resource utilization, improvement lime quality, energy saving, be an advanced technology that leads the green development of iron and steel industry.

Disclosure of Invention

The utility model provides a large-scale rotary kiln system which is used for calcining active lime or light-burned dolomite; the large rotary kiln with two-grade support is taken as core equipment, a preheater system is arranged at the front end of the system, a material cooling system is arranged at the rear end of the system, and other related supporting equipment is added to form a large rotary kiln system; as an advanced technology for leading the green development of the steel industry, the method has obvious comprehensive benefits and advantages in the aspects of improving the resource utilization rate, improving the lime quality, saving energy and the like.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a large-scale rotary kiln system comprises a rotary kiln, a preheater system, a material sliding vehicle and a material cooling system; the rotary kiln is provided with two stages of supports, a kiln body of the rotary kiln is obliquely arranged, the lower end is a kiln head end, and the higher end is a kiln tail end; the preheater system is arranged at the tail end of the kiln and comprises a material distributing bin, a preheater body and a material pushing system; a material sliding vehicle is arranged between a feed opening at the bottom of the preheater system and the inlet of the rotary kiln; the material cooling system is arranged at the end of the kiln head, the top of the material cooling system is connected with the outlet of the rotary kiln, the bottom of the material cooling system is provided with a discharge port, and a cooler with an external air chamber is arranged in the material cooling system.

The rotary kiln comprises a kiln body, a kiln head, a kiln tail, a first supporting device, a second supporting device, a propelling wheel belt, a large gear ring and a double-power transmission device; the kiln head, the kiln body and the kiln tail are sequentially connected to form a rotary kiln body; a first supporting device is arranged at one end of the kiln body close to the kiln tail, and a second supporting device is arranged at one end of the kiln body close to the kiln head; the first supporting device is provided with a heavy catch wheel and a heavy-load riding wheel group which are matched with the propelling wheel belt; the second supporting device is provided with a heavy-load riding wheel set matched with the wheel belt; a large gear ring is arranged on the kiln body between the first supporting device and the second supporting device and close to the first supporting device, and the large gear ring is connected with the double-power transmission device and transmits power; the double-power transmission device consists of a driving motor and a diesel engine which are arranged in parallel.

The heavy catch wheel is in rolling contact with the conical surface at the lower end of the propelling wheel belt, and the propelling wheel belt is pushed through hydraulic drive, so that the propelling wheel belt moves along the surface of the riding wheel of the heavy-duty riding wheel group and drives the kiln body to move up and down in a reciprocating manner; the high end of the propelling wheel belt at the side opposite to the heavy catch wheel is provided with an upward movement preventing device; the upward movement preventing device is a stopper and is arranged at the highest limit of the upward movement stroke of the propelling wheel belt, the heavy type catch wheel is provided with a travel switch, and the signal output end of the travel switch is connected with the signal input end of the alarm device.

The propelling wheel belt and the wheel belt are loosely sleeved at corresponding positions of the outer ring of the kiln body through corresponding wheel belt base plates; the wheel belt backing plate comprises a floating backing plate and a stop block; floating base plates are respectively arranged at the gap between the propelling wheel belt and the kiln body and the gap between the wheel belt and the kiln body, four edges of each floating base plate respectively extend out of the propelling wheel belt or the wheel belt and are provided with stop blocks, the floating base plates are fixedly welded with the stop blocks, and the stop blocks are fixedly welded with the kiln body.

And the first supporting device and the second supporting device are respectively provided with a jackscrew device, and the jackscrew devices are arranged on the outer sides of the supporting roller supports of the corresponding heavy-load supporting roller sets.

The preheater system comprises a material distribution bin, a preheater body and a material pushing system; the preheater body consists of an upper annular bin and a lower conical bin; the material distributing bin is arranged at the top of the upper annular bin; the upper annular bin is of a hollow annular structure, and the interior of the upper annular bin is uniformly divided into a plurality of material distribution bins by partitions; the inner wall of the preheater body is provided with a heat insulation layer; the material pushing system consists of a plurality of groups of material pushing devices, and each group of material pushing devices and each material distributing bin are arranged at the top of the lower conical bin in a one-to-one correspondence manner.

The material cooling system comprises a kiln head collecting cover, a sealing cover, a double-layer grate, a discharging gate, a cooler and a discharging device; the kiln head of the rotary kiln is surrounded by the kiln head collecting cover, the outer end of the kiln head of the rotary kiln is provided with the sealing cover, and the kiln head of the rotary kiln and the sealing cover as well as the kiln head collecting cover are hermetically connected; the bottom of the kiln head collecting cover is connected with a cooler through a transition chamber, and a double-layer grate is arranged in the transition chamber; the grid size of the upper grate in the double-layer grate is larger than that of the lower grate; the double-layer grate is obliquely arranged, and a discharge gate is arranged on one side of the transition bin corresponding to the lower end of the double-layer grate; the cooler comprises a plurality of independent cooling spaces, and the bottom of each cooling space is provided with a feed opening; the discharging device comprises a plurality of vibrating feeders and a central collecting hopper; the central material collecting hopper is arranged below the cooler corresponding to the central position of the cooler, the plurality of feed openings are connected with the central material collecting hopper through correspondingly arranged vibrating feeders, and a discharge opening is formed in the bottom of the central material collecting hopper; the bottom of the cooler is provided with a cooling air inlet which is connected with a cooling air pipeline.

The cooler is a cooler with an external air chamber and comprises an upper bin body, a ring beam, a central air distributor, a chamber-dividing air distributor, a lower conical bin and a discharging conical hopper; the upper bin body is an upright silo, the top opening is a material inlet, and the bottom of the upper bin body is supported on the ring beam; the central air distributor is arranged in the center of the upper cabin body, a plurality of chambered air distributors are arranged on the periphery of the central air distributor, and the central air distributor is higher than the chambered air distributors; the central air distributor is provided with a central air cone and a central air ring, and the chambered air distributor is provided with an air cone and an air ring; the bottom of the upper bin body is connected with a plurality of discharging conical hoppers, the discharging conical hoppers and the chambered air distributor are arranged in a one-to-one correspondence manner, and the periphery of each discharging conical hopper is provided with a lower conical bin; the blanking cone hopper consists of a plurality of sections of cone hoppers, and an annular gap is arranged between every two adjacent 2 sections of cone hoppers; the space between the lower cone bin and the blanking cone hopper is divided into a plurality of air supply chambers, and the air supply chambers are communicated with a chambered air distributor; the cooling air pipeline is connected with the central air distributor through a central air supply pipe and is connected with the corresponding air supply chambers through a plurality of air chamber air supply pipes.

The central air distributor is arranged in the middle of the upper bin body and consists of a central air cone and a central air ring, and the central air cone is positioned above the central air ring; the central air cone consists of a vertical air pipe and a central air cap fixedly arranged above the vertical air pipe, an annular air outlet is arranged between the central air cap and the vertical air pipe, and the bottom end of the vertical air pipe is connected with a central air supply pipe; the central air ring consists of an annular air pipe and an annular air cap fixedly arranged above the annular air pipe, and an inner annular air outlet and an outer annular air outlet are arranged between the annular air cap and the annular air pipe; the annular air pipe is connected with the vertical air pipe through the inclined communicating pipe; the chambered air distributor is arranged at the lower part of the upper bin body and consists of an air cone, an upper air ring, a lower air ring and a bottom cone; the upper wind ring is arranged above the wind cone, and the lower wind ring is arranged below the wind cone; the wind cone is provided with an annular air outlet, and the upper wind ring and the lower wind ring are both provided with an inner annular air outlet and an outer annular air outlet; the upper wind ring and the lower wind ring are connected through a plurality of vertical communicating pipes, the wind cone is connected with the bottom cone barrel through a straight pipe, and the straight pipe is connected with the vertical communicating pipes through a plurality of inclined connecting pipes; the bottom conical cylinder is communicated with the air supply chamber through an internal transverse air duct; the blanking cone hopper consists of a top cone hopper, a middle cone hopper and a bottom cone hopper, wherein the bottom of the top cone hopper is inserted into the top of the middle cone hopper for a certain distance, and the bottom of the middle cone hopper is inserted into the top of the bottom cone hopper for a certain distance; the top cone hopper is connected with the middle cone hopper and the middle cone hopper is connected with the bottom cone hopper through a plurality of connecting plates which are uniformly arranged along the circumferential direction.

Compared with the prior art, the beneficial effects of the utility model are that:

for calcining active lime or light burned dolomite; the large rotary kiln with two-gear support is taken as core equipment, a preheater system is arranged at the front end of the system, a material cooling system is arranged at the rear end of the system, and other related supporting equipment is added to form a large rotary kiln system; as an advanced technology for leading the green development of the steel industry, the method has obvious comprehensive benefits and advantages in the aspects of improving the resource utilization rate, improving the lime quality, saving energy and the like.

Drawings

Fig. 1 is a schematic structural diagram of a large rotary kiln system of the present invention.

Fig. 1a is a partial enlarged view of fig. 1.

Fig. 1b is a partial enlarged view of fig. 1.

Fig. 2 is a view a-a of fig. 1 and 1 a.

Fig. 3 is a view B-B of fig. 1 and 1B.

Fig. 4 is a front view of the material cooling system of the present invention.

Fig. 5 is a side view of fig. 4.

Fig. 6 is a front view of the cooler of the present invention.

Fig. 7 is a side view of fig. 6.

In the figure: 1-rotary kiln 1.1-kiln body 1.2-kiln tail 1.3-kiln head 1.4-refractory material lining 2-preheater system 2.1-material separating bin 2.2-material separating conical surface 2.3-blanking tube 2.4-material pushing conical surface 2.5-material sliding conical surface 2.6-material sliding inclined surface 3-material sliding vehicle 4-supporting device 4.1-heavy-duty riding wheel set 4.2-heavy-duty catch wheel 4.3-upward-fleeing-proof device 4.4-jackscrew device 4.4.1-jackscrew box 4.4.2-jackscrew 4.3-nut 4.4.4-bolt 4.5-wheel belt backing plate 4.5.1-floating backing plate 4.5-stop block 5-propelling wheel belt 6-large gear ring 7-double-power transmission device 8-supporting device two 8.1-heavy-duty riding wheel set 8.2-jackscrew device 8.2.1-jackscrew box 8.2.2-jackscrew 8.2.3 Nut 8.2.4-bolt 8.3-tyre backing plate 8.3.1-floating backing plate 8.3.2-stop 9-tyre 10-material cooling system 10.1-kiln head aggregate cover 10.2-sealing cover 10.3-double-layer grate 10.4-discharge gate 10.4.1-discharge gate 10.4.2-electrohydraulic push rod 10.4.3-counterweight 10.5-cooler 10.5.1-upper bin 10.5.2-refractory material heat-insulating layer 10.5.3-central air distributor 10.5.4-chamber-divided air distributor 10.5.5-lower cone bin 10.5.6-discharge cone 10.5.7-internal transverse air duct 10.5.8-air supply chamber 10.6-discharging device 10.6.1-central aggregate hopper 10.6.2-vibrating feeder 11.1-cooling air system 11.2-combustion air system 12.1-feeding system 12.2-discharging system 13-combustion system 14-coal powder Storage and transportation system 15.1-heavy catch wheel hydraulic system 15.2-preheater hydraulic system 16.1-heavy duty riding wheel cooling water system 16.2-hydraulic station cooling water system 17.1-kiln head cooling fan 17.2-kiln tail cooling fan 18.1-preheater dust removal system 18.2-cooler dust removal system 19.1-preheater material recovery system 19.2-cooler material recovery system 20-temperature and pressure detection and control system

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

as shown in fig. 1, fig. 1a and fig. 1b, the large-scale rotary kiln system of the present invention includes a rotary kiln 1, a preheater system 2, a material sliding cart 3 and a material cooling system 10; the rotary kiln 1 is provided with two-gear support, a kiln body 1.1 of the rotary kiln is obliquely arranged, the lower end is a kiln head end, and the higher end is a kiln tail end; the preheater system 2 is arranged at the tail end of the kiln and comprises a material distribution bin 2.1, a preheater body and a material pushing system; a material sliding vehicle 3 is arranged between a feed opening at the bottom of the preheater system 2 and the inlet of the rotary kiln; the material cooling system 10 is arranged at the end of the kiln head, the top of the material cooling system 10 is connected with the outlet of the rotary kiln, the bottom of the material cooling system 10 is provided with a discharge port, and a cooler 10.5 with an external air chamber is arranged in the material cooling system 10.

The rotary kiln 1 comprises a kiln body 1.1, a kiln head 1.3, a kiln tail 1.2, a first supporting device 4, a second supporting device 8, a propelling belt 5, a belt 9, a large gear ring 6 and a double-power transmission device 7; the kiln head 1.3, the kiln body 1.1 and the kiln tail 1.2 are sequentially connected to form a rotary kiln body; a first supporting device 4 is arranged at one end of the kiln body 1.1 close to the kiln tail 1.2, and a second supporting device 8 is arranged at one end of the kiln body 1.1 close to the kiln head 1.3; as shown in fig. 2, the first supporting device 4 is provided with a heavy catch wheel 4.2 and a heavy-duty riding wheel set 4.1 which are matched with the propelling wheel belt 5; as shown in fig. 3, the second supporting device 8 is provided with a heavy-duty riding wheel set 8.1 which is matched with the belt 9; a large gear ring 6 is arranged between the first supporting device 4 and the second supporting device 8 and on the kiln body 1.1 close to the first supporting device 4, and the large gear ring 6 is connected with a double-power transmission device 7 and transmits power; the double-power transmission device 7 consists of a driving motor and a diesel engine which are arranged in parallel.

The heavy catch wheel 4.2 is in rolling contact with the conical surface at the lower end of the pushing wheel belt 5, and the pushing wheel belt 5 is pushed through hydraulic drive, so that the pushing wheel belt 5 moves along the surface of the riding wheel of the heavy-duty riding wheel group 4.1, and drives the kiln body 1.1 to move up and down in a reciprocating manner; the high end of the propelling wheel belt 5 at the side opposite to the heavy catch wheel 4.2 is provided with an upward movement preventing device 4.3; the upward movement preventing device 4.3 is a stopper and is arranged at the highest limit of the upward movement stroke of the propelling wheel belt 5; the heavy catch wheel 4.2 is provided with a travel switch, and the signal output end of the travel switch is connected with the signal input end of the alarm device.

The propelling belt 5 and the belt 9 are loosely sleeved at the corresponding positions of the outer ring of the kiln body 1.1 through the corresponding belt backing plates 4.5; the belt backing plate 4.5 comprises a floating backing plate 4.5.1 and a stop block 4.5.2; the gap between the pushing belt 5 and the kiln body 1.1 and the gap between the belt 9 and the kiln body 1.1 are respectively provided with a floating backing plate 4.5.1, four sides of the floating backing plate 4.5.1 respectively extend out of the pushing belt 5 or the belt 9 and are provided with a stop block 4.5.2, the floating backing plate 4.5.1 is welded and fixed with the stop block 4.5.2, and the stop block 4.5.2 is welded and fixed with the kiln body 1.1.

And the first supporting device 4 and the second supporting device 8 are respectively provided with a jackscrew device (4.4 or 8.2), and the jackscrew devices (4.4 or 8.2) are arranged on the outer sides of the supporting roller supports of the corresponding heavy-load supporting roller sets (4.1 or 8.1).

The preheater system 2 comprises a material distribution bin 2.1, a preheater body and a material pushing system; the preheater body consists of an upper annular bin and a lower conical bin; the material distributing bin 2.1 is arranged at the top of the upper annular bin; the upper annular bin is of a hollow annular structure, and the interior of the upper annular bin is uniformly divided into a plurality of material distribution bins by partitions; the inner wall of the preheater body is provided with a heat insulation layer; the material pushing system consists of a plurality of groups of material pushing devices, and each group of material pushing devices and each material distributing bin are arranged at the top of the lower conical bin in a one-to-one correspondence manner.

As shown in fig. 4 and 5, the material cooling system 10 comprises a kiln head collecting cover 10.1, a sealing cover 10.2, a double-layer grate 10.3, a discharging gate 10.4, a cooler 10.5 and a discharging device 10.6; the kiln head collecting cover 10.1 encloses the kiln head 1.3 of the rotary kiln 1, the outer end of the kiln head 1.3 of the rotary kiln 1 is provided with a sealing cover 10.2, and the kiln head 1.3 of the rotary kiln 1 is hermetically connected with the sealing cover 10.2, and the sealing cover 10.2 is hermetically connected with the kiln head collecting cover 10.1; the bottom of the kiln head collecting cover 10.1 is connected with a cooler 10.5 through a transition chamber, and a double-layer grate 10.3 is arranged in the transition chamber; the grid size of the upper layer of the double-layer grate 10.3 is larger than that of the lower layer of grate; the double-layer grate 10.3 is obliquely arranged, and a discharge gate 10.4 is arranged on one side of the transition bin corresponding to the lower end of the double-layer grate 10.3; the cooler 10.5 comprises a plurality of independent cooling spaces, and the bottom of each cooling space is provided with a feed opening; the discharging device 10.6 comprises a plurality of vibrating feeders 10.6.2 and a central collecting hopper 10.6.1; the central position of the central aggregate bin 10.6.1, which corresponds to the cooler 10.5, is arranged below the cooler 10.5, the plurality of feed openings are connected with the central aggregate bin 10.6.1 through the correspondingly arranged vibrating feeders 10.6.2, and the bottom of the central aggregate bin 10.6.1 is provided with a discharge opening; the bottom of the cooler 10.5 is provided with a cooling air inlet which is connected with a cooling air pipeline.

As shown in fig. 6 and 7, the cooler 10.5 is a cooler with an external air chamber, and comprises an upper bin body 10.5.1, a ring beam, a central air distributor 10.5.3, a chambered air distributor 10.5.4, a lower cone bin 10.5.5 and a blanking cone hopper 10.5.6; the upper bin body 10.5.1 is an upright bin, the top opening is a material inlet, and the bottom is supported on the ring beam; a central air distributor 10.5.3 is arranged at the center of the upper cabin body 10.5.1, a plurality of chambered air distributors 10.5.4 are arranged at the periphery of the central air distributor 10.5.3, and the central air distributor 10.5.3 is arranged higher than the chambered air distributor 10.5.4; the central air distributor 10.5.3 is provided with a central air cone and a central air ring, and the chamber air distributor 10.5.4 is provided with an air cone and an air ring; the bottom of the upper bin body 10.5.1 is connected with a plurality of discharging cone hoppers 10.5.6, the discharging cone hoppers 10.5.6 are arranged in one-to-one correspondence with the chambered air distributors 10.5.4, and the periphery of the discharging cone hoppers 10.5.6 is provided with lower cone bins 10.5.5; the blanking cone 10.5.6 is composed of multiple segments of cone, and an annular gap is arranged between every two adjacent 2 segments of cone; the space between the lower cone bin 10.5.5 and the blanking cone hopper 10.5.6 is divided into a plurality of air supply chambers 10.5.8, and the air supply chambers 10.5.8 are communicated with a chamber-divided air distributor 10.5.4; the cooling air duct is connected to the central air distributor 10.5.3 through a central air supply duct, and is connected to the corresponding air supply chamber 10.5.8 through a plurality of air chamber air supply ducts.

The central air distributor 10.5.3 is arranged in the middle of the upper cabin body 10.5.1 and consists of a central air cone and a central air ring, and the central air cone is positioned above the central air ring; the central air cone consists of a vertical air pipe and a central air cap fixedly arranged above the vertical air pipe, an annular air outlet is arranged between the central air cap and the vertical air pipe, and the bottom end of the vertical air pipe is connected with a central air supply pipe; the central air ring consists of an annular air pipe and an annular air cap fixedly arranged above the annular air pipe, and an inner annular air outlet and an outer annular air outlet are arranged between the annular air cap and the annular air pipe; the annular air pipe is connected with the vertical air pipe through the inclined communicating pipe; the chambered air distributor 10.5.4 is arranged at the lower part of the upper cabin body 10.5.1 and consists of an air cone, an upper air ring, a lower air ring and a bottom cone; the upper wind ring is arranged above the wind cone, and the lower wind ring is arranged below the wind cone; the wind cone is provided with an annular air outlet, and the upper wind ring and the lower wind ring are both provided with an inner annular air outlet and an outer annular air outlet; the upper wind ring and the lower wind ring are connected through a plurality of vertical communicating pipes, the wind cone is connected with the bottom cone barrel through a straight pipe, and the straight pipe is connected with the vertical communicating pipes through a plurality of inclined connecting pipes; the bottom cone is communicated with an air supply chamber 10.5.8 through an internal transverse air duct 10.5.7; the blanking cone 10.5.6 is composed of a top cone, a middle cone and a bottom cone, the bottom of the top cone is inserted into the top of the middle cone for a distance, and the bottom of the middle cone is inserted into the top of the bottom cone for a distance; the top cone hopper is connected with the middle cone hopper and the middle cone hopper is connected with the bottom cone hopper through a plurality of connecting plates which are uniformly arranged along the circumferential direction.

The working method of the large-scale rotary kiln system comprises the following steps:

1) the raw materials are equally divided through the material dividing bins 2.1 and are respectively guided into the corresponding material dividing bins in the preheater body through a plurality of blanking pipes 2.3 for preheating;

2) the preheated materials are pushed to a material sliding vehicle 3 in batches by a material pushing device and are transported to the inlet of the rotary kiln by the material sliding vehicle 3;

3) the rotary kiln 1 which is obliquely arranged is provided with two-gear supports, materials are conveyed from a high-end inlet to a low-end outlet through rotation, and the materials reaching the outlet are the materials which are calcined;

4) the calcined material is sent into a material cooling system 10, the material is naturally discharged from top to bottom and is cooled by a cooler 10.5, and the cooled material is discharged from a discharge pipe at the bottom of the material cooling system 10 and is continuously sent out through a discharge system 12.2;

5) the cooling air is sent from the lower part of the material cooling system 10, passes through a material layer in the cooler 10.5 from bottom to top, enters the rotary kiln 1 after being cooled, flows to the high end through the low end of the rotary kiln 1, enters the preheater system 2 to preheat the material, and is finally discharged through the preheater dust removal system 18.1.

The following examples are carried out on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following examples.

[ examples ] A method for producing a compound

As shown in fig. 1, fig. 1a, and fig. 1b, in this embodiment, a large-scale rotary kiln system is used for calcining active lime or light burned dolomite, and a large-scale rotary kiln supported by two stages is used as a core device, and further includes other related systems, such as a preheater system 2, a material cooling system 10, a hydraulic system, a cooling water system, a pulverized coal storage and transportation system 14, an air cooling system, a ventilation system, a dust removal system, a combustion system 13, a conveying system, a material recovery system, and a temperature and pressure detection and control system 20.

The rotary kiln 1 with two-gear support mainly comprises: the kiln comprises a kiln body 1.1, a kiln head 1.3, a kiln tail 1.2 and two-gear supports, as shown in figures 2 and 3, wherein the two-gear supports are a first support device 4 with a heavy catch wheel 4.2 and a second support device 8 without the catch wheel. A propelling belt 5 is arranged with the first supporting device 4, and a belt 9 is arranged with the second supporting device 8. The first supporting device 4 and the second supporting device 8 both comprise a heavy-duty riding wheel set 4.1 and a screw jacking device 4.4, and the rotary kiln 1 further comprises a belt backing plate 4.5, a double-power transmission device 7, a large gear ring 6 and the like.

The components of the large rotary kiln system are obliquely arranged along with the rotary kiln body 1.1, namely, the high end and the low end exist. The two ends of the kiln body 1.1 are respectively a kiln head end and a kiln tail end, wherein the lower end is the kiln head end, and the high end is the kiln tail end. The kiln body 1.1 is supported on a first supporting device 4 and a second supporting device 8 through a propelling belt 5 and a propelling belt 9 respectively. The propelling wheel belt 5 and the wheel belt 9 are loosely sleeved on the corresponding positions of the outer ring of the kiln body through corresponding wheel belt backing plates (4.5 or 8.3) and are supported on corresponding heavy-load riding wheel sets (4.1 or 8.1). The first supporting device 4 with the heavy catch wheel 4.2 and the propelling wheel belt 5 are arranged at the high end of the kiln body 1.1, and the second supporting device 8 and the wheel belt 9 are arranged at the low end of the kiln body 1.1.

The double-power transmission device 7 and the large gear ring 6 are arranged between the two-gear support and close to one side of the first support device 4. The large gear ring 6 is driven by a double-power transmission device 7 to drive the kiln body 1.1 to rotate. The heavy catch wheel 4.2 is special for a large rotary kiln supported by two gears, and is respectively arranged at two sides of the bottom of the propelling wheel belt 5 together with the upward movement preventing device 4.3, namely at the lower end and the upper end of the propelling wheel belt 5 respectively, and is used for controlling the propelling wheel belt 5 to move along the axial direction of the rotary kiln 1. The heavy catch wheel 4.2 is in rolling contact with the conical surface at the lower end of the pushing wheel belt 5, and pushes the pushing wheel belt 5 through hydraulic drive, so that the pushing wheel belt 5 moves along the surface of the riding wheel of the heavy-duty riding wheel group 4.1, and drives the kiln body 1.1 to move up and down in a reciprocating and micro-scale manner. The upward movement preventing device 4.3 is arranged at the high end of the pushing belt 5 and is positioned at the end point of the upward movement stroke of the pushing belt 5, and is used for preventing the kiln body 1.1 from moving upward in the stroke. When the kiln body is in normal work, the upward movement preventing device 4.3 is not in contact with the end face of the propelling belt wheel 5, if the upward movement preventing device is in contact with the end face of the propelling belt wheel, the kiln body 1.1 is prompted to move upwards to the highest limit position, and adjustment treatment is needed.

The side surface of the propelling wheel belt 5 is provided with a barrier strip for axially fixing the propelling wheel belt along the center of the rotary kiln 1, namely, the propelling wheel belt 5 and the rotary kiln 1 can axially move together and can relatively rotate. When the heavy catch wheel 4.2 pushes the propelling wheel belt 5 along the axial direction of the rotary kiln 1 under the action of the hydraulic system, the kiln body 1.1 of the rotary kiln can be driven to move along the axial direction. The propelling belt 5 is supported on the riding wheel of the heavy-duty riding wheel set 4.1, and the width of the riding wheel is limited, so the axial play of the rotary kiln 1 is very small, generally about 50mm, and the play is mainly used for preventing the propelling belt 5 from rotating in the same place on the riding wheel all the time to cause serious abrasion. The heavy catch wheel 4.2 is provided with a travel switch which can trigger an alarm to give an alarm. Normally, the rotary kiln will only run down under the influence of gravity, essentially with the pusher wheel 5 abutting against the corresponding heavy catch wheel 4.2 and starting as soon as the heavy catch wheel 4.2 is reached. However, the individual rotary kilns will shift to the high end along the axial line, and if the shifting amount is large, the propelling belt 5 will be separated from the corresponding riding wheel, so that the upward shifting prevention device 4.3 is needed to be arranged for blocking.

In the embodiment, the length-diameter ratio (the ratio of the length to the diameter) of the kiln body 1.1 is 12-15. The outer ends of the two-gear support of the kiln body 1.1 are respectively extended to form cantilever balance weights by a certain length so as to balance the stress at each part of the kiln body. Wherein, the length of the cantilever at the kiln head end (the lower end of the kiln body) is slightly shorter than that at the kiln tail end (the high end of the kiln body).

The loads of the first supporting device 4 and the second supporting device 8 are borne by the corresponding heavy-load riding wheel sets 4.1 and 8.1 and the corresponding jackscrew devices 4.4 and 8.2 respectively. The kiln body 1.1 is supported on the corresponding heavy-load riding wheel sets 4.1 and 8.1 through a propelling belt 5 and a belt 9. Each heavy-load riding wheel group not only bears the load vertically downwards, but also bears the thrust load transversely outwards of the kiln body 1.1. While the jackscrew devices 4.4, 8.2 are used to take up laterally outward thrust loads (this load amounts to several hundred tons). The jackscrew devices 4.4 and 8.2 and the heavy-load riding wheel sets 4.1 and 8.1 are both arranged on the upper part of the bottom bracket of the first supporting device 4 or the second supporting device 8. The jackscrew devices 4.4 and 8.2 can jack the heavy-duty carrier roller sets 4.1 and 8.1 to prevent the heavy-duty carrier roller sets from moving outwards transversely. In this embodiment, the jackscrew device 4.4 comprises jackscrew box 4.4.1, jackscrew 4.4.2, bolt 4.4.3 and nut 4.4.4, jackscrew device 8.2 comprises jackscrew box 4.4.1, jackscrew 8.2.2, bolt 8.2.3 and nut 8.2.4, set up the slot on the upper portion of bottom support, with the lower part of jackscrew box embedded in the slot, the end plate bottom that the jackscrew box kept away from kiln body one end is supported by the slot frame, the trompil penetrates the jackscrew on the end plate that is close to kiln body one end, the jackscrew is locked by 2 nuts of locating the end plate both sides, the jackscrew head top is on the outer terminal surface of the bearing frame of heavy-duty riding wheel subassembly. The bottom of the top thread box is fixedly connected with the bottom bracket through a bolt. The extrapolation load born by the heavy-load riding wheel set is transmitted to the jackscrew box by the jackscrew and then transmitted to the bottom bracket, and further transmitted to the concrete foundation.

The floating backing plate (4.5.1 or 8.3.1) in the belt backing plate (4.5 or 8.3) is indirectly fixed with the kiln body 1.1. The floating backing plate (4.5 or 8.3) positioned at the gap between the pushing wheel belt 5 (or the wheel belt 9) and the kiln body 1.1 is not directly welded with the kiln body 1.1, but the four sides of the floating backing plate (4.5 or 8.3) extending out of the pushing wheel belt 5 (or the wheel belt 9) are externally provided with a stop block (4.5.2 or 8.3.2), the contact area of the floating backing plate and the stop block is welded, and the stop block is welded with the kiln body, so that the floating backing plate and the kiln body are indirectly fixed. By adopting the structure, the kiln body under the propelling belt (or the belt) can be prevented from generating deformation or internal stress due to welding.

Taking the installation of the belt 9 as an example, the belt 9 is sleeved outside the kiln body 1.1 through a floating liner plate 8.3.1, and in addition, a stop block 8.3.2, an end baffle, a belt side barrier strip, a side barrier strip stop block and an adjusting device (comprising an adjusting block and an adjusting bolt) are also arranged. A plurality of floating backing plates 8.3.1 are uniformly distributed at the gap between the belt 9 and the kiln body 1.1. When the kiln body 1.1 rotates, the wheel belt 9 rotates on the riding wheel along with the floating base plate 8.3.1 under the action of friction force, and the load of the whole kiln body 1.1 is transmitted to the riding wheel. The floating backing plate 8.3.1 is attached to the outer surface of the kiln body 1.1 and is not welded with the kiln body 1.1, so the floating backing plate is called as a floating backing plate. Because the kiln body 1.1 is not directly welded, the kiln body can naturally extend along with the thermal expansion of the kiln body 1.1, the welding stress of the kiln body 1.1 is obviously reduced, and the thermal stress generated by the thermal expansion is also obviously reduced. But the floating backing plate 8.3.1 also needs to be fixed, and is indirectly and fixedly arranged on the outer surface of the kiln body 1.1 through the baffle 8.3.2 and the end baffle which are arranged on the periphery of the floating backing plate and directly welded with the kiln body. The wheel belt 9 is sleeved on the floating cushion plate 8.3.1 and then axially positioned through the wheel belt side barrier strips arranged on the two sides. The side stop strip of the tyre is also indirectly fixed on the floating cushion plate 8.3.1 through the side stop strip stop block. The belt 9 can make slight axial movement between the belt side barrier strips on both sides. The floating base plate 8.3.1 and the wheel belt side barrier strips are arranged in an alternate and staggered mode, so that stress is fully released, and blocking and abrasion are reduced.

A material distributing bin 2.1 at the upper part of the preheater system 2 is arranged above the feed inlet of the rotary kiln, and raw materials are uniformly distributed and guided into a plurality of blanking pipes 2.3 after passing through the material distributing bin 2.1; the blanking pipe 2.3 is connected with each material distributing bin of the preheater body, the materials enter each material distributing bin in the preheater body through the blanking pipe 2.3 to be preheated, and the preheated materials are pushed into the material sliding cart 3 below in batches by the material pushing device; the material sliding vehicle 3 is arranged between the preheater system 2 and the rotary kiln inlet and is used for transferring materials in the preheater body to the rotary kiln inlet; the rotary kiln 1 installed obliquely sends the material from an inlet at a high end to an outlet at a low end through rotation, and the material reaching the outlet is the material which is calcined. The calcined high-temperature material is sent into the material cooling system 10, naturally discharged from top to bottom and cooled by the cooler 10.5, and the cooled material is discharged from a discharge pipe at the bottom of the material cooling system 10 and continuously sent out through the discharge system 12.2.

In the embodiment, the preheater system 2 comprises a material distribution bin 2.1, a preheater body, a material pushing system, an annular walking board and a supporting system; the preheater body consists of an upper annular bin and a lower conical bin; the material distributing bin 2.1 is arranged at the top of the upper annular bin; the upper annular bin is of a hollow annular structure, and the interior of the upper annular bin is uniformly divided into a plurality of material distribution bins by partitions; the inner wall of the preheater body is provided with a heat insulation layer; the material pushing system consists of a plurality of groups of material pushing devices, and each group of material pushing devices and each material distributing bin are arranged at the top of the lower conical bin in a one-to-one correspondence manner; the outer side of the lower part of the preheater body is provided with an annular walking board; the support system is a three-dimensional space support system which is arranged along the height direction of the preheater body and consists of a plurality of layers of steel structure supports.

The material pushing device consists of a hydraulic cylinder, a heat-resistant material pushing trolley, a guide pulley and a roller; the hydraulic cylinder is arranged on the outer side of the preheater body, and the axis of the hydraulic cylinder is parallel to the bottom surface of the upper material pushing cone; a push rod of the hydraulic cylinder is connected with a heat-resistant pushing trolley through a guide pulley, the heat-resistant pushing trolley is arranged in a pushing space in the preheater body, and the pushing space is communicated with the inner space of the upper pushing cone; when a push rod of the hydraulic cylinder drives the heat-resistant material pushing trolley to move towards the inner side of the preheater body, the bottom of the heat-resistant material pushing trolley is in rolling contact with the bottom surface of the upper material pushing cone through the roller.

The preheater system 2 is provided with a plurality of layers of blanking cones, and the blanking is carried out by adopting a mode of combining external drive with self-flowing blanking. The material at the position of the pushing conical surface 2.4 is driven by the pushing device to move downwards along the conical surface and drives the material at the upper part and the lower part to automatically flow, so that a material continuous blanking system is formed. Firstly, materials are pushed to a material sliding conical surface 2.5 in a lower conical hopper on a material pushing conical surface 2.4 arranged in a preheater body and driven by a material pushing device, automatically fall into a material sliding vehicle 3 along the conical surface, and then slide to an inlet of a rotary kiln through a material sliding inclined surface 2.6 in the material sliding vehicle 3; secondly, when the material on the pushing conical surface 2.4 is pushed downwards, the material in the inverted cone bin arranged in the material distributing bin 2.1 at the upper end automatically fills the gap downwards along the material distributing conical surface 2.2. After the steps are completed, the one-time feeding process before the kiln is realized.

As shown in fig. 4 and 5, in the embodiment, the material cooling system 10 includes a kiln head aggregate cover 10.1, a sealing cover 10.2, a double-layer grate 10.3, a discharge gate 10.4, a cooler 10.5 and a discharge device 10.6; the kiln head aggregate cover 10.1 is arranged at the discharge end of the rotary kiln 1, the kiln head 1.3 of the rotary kiln is enclosed in the kiln head aggregate cover, the outer end of the kiln head 1.3 of the rotary kiln is provided with a sealing cover 10.2, and the kiln head 1.3 of the rotary kiln and the sealing cover 10.2 as well as the sealing cover 10.2 and the kiln head aggregate cover 10.1 are in sealing connection; the bottom of the kiln head collecting cover 10.1 is connected with a cooler 10.5 through a transition chamber, and a double-layer grate 10.3 is arranged in the transition chamber; the grid size of the upper layer of the double-layer grate 10.3 is larger than that of the lower layer of grate; the double-layer grate 10.3 is obliquely arranged, and a discharge gate 10.4 is arranged on one side of the transition bin corresponding to the lower end of the double-layer grate 10.3; the cooler 10.5 comprises a plurality of independent cooling spaces, and the bottom of each cooling space is provided with a feed opening; the discharging device 10.6 comprises a plurality of vibrating feeders 10.6.2 and a central collecting hopper 10.6.1; the central position of the central aggregate bin 10.6.1 corresponding to the cooler 10.5 is arranged below the cooler 10.5, a plurality of feed openings are connected with the central aggregate bin 10.6.1 through correspondingly arranged vibrating feeders 10.6.2, and a discharge opening arranged at the bottom of the central aggregate bin 10.6.1 is connected with a discharge system 12.2; the bottom of the cooler 10.5 is provided with a cooling air inlet which is connected with a cooling air system 11.1.

The double-layer grate 10.3 comprises an upper layer grate subassembly and a lower layer grate subassembly, wherein the upper layer grate subassembly consists of an upper layer grate, a high-end support, a low-end support and a middle support; the lower grate component consists of a lower grate, a supporting beam and a supporting beam cooling air pipe; the high end of the upper grate is connected with the corresponding side bin wall of the transition bin through a high end support, and the low end of the upper grate is connected with the corresponding side bin wall of the transition bin through a low end support; the lower grate is supported by a supporting beam, and two ends of the supporting beam are respectively connected with the walls of the corresponding ends of the transition bin chambers; the middle part of the upper grate is connected with the supporting beam through a middle bracket; one end of the supporting beam cooling air pipe is connected with a cooling fan arranged outside the transition bin, and the other end of the supporting beam cooling air pipe extends to the supporting beam and is provided with a plurality of air outlets.

The discharging gate 10.4 consists of a closed gate body, a discharging gate 10.4.1, an electro-hydraulic push rod 10.4.2, a balancing weight 10.4.3 and a hanging bracket; the closed gate body is arranged in parallel with the double-layer grate 10.3 and is suspended outside the transition bin through a hanging bracket; the discharging gate 10.4.1 is arranged in the closed gate body, the counterweight 10.4.3 is arranged on the discharging gate 10.4.1, and the discharging gate 10.4.1 is in a closed state under the action of the counterweight 10.4.3; still be equipped with electric liquid push rod 10.4.2 between the gate 10.4.1 and the closed floodgate body of unloading, establish pressure sensor on the gate 10.4.1 of unloading, pressure sensor and electric liquid push rod 10.4.2 interlocking control, when pressure sensor's monitoring value is greater than the pressure value of unloading of settlement, overcome the load of balancing weight 10.4.3 through electric liquid push rod 10.4.2 and make the gate 10.4.1 of unloading open.

As shown in fig. 6 and 7, cooler 10.5 includes upper bin 10.5.1, ring beams, center air distributor 10.5.3, chambered air distributor 10.5.4, lower cone bin 10.5.5, and blanking cone hopper 10.5.6; the upper bin body 10.5.1 is an upright bin, the wall of the bin is provided with a refractory material heat-insulating layer 10.5.2, the top opening is a material inlet, and the bottom of the bin is supported on a ring beam; a central air distributor 10.5.3 is arranged at the center of the upper cabin body 10.5.1, a plurality of chambered air distributors 10.5.4 are arranged at the periphery of the central air distributor 10.5.3, and the central air distributor 10.5.3 is arranged higher than the chambered air distributor 10.5.4; the central air distributor 10.5.3 is provided with a central air cone and a central air ring, and the chamber air distributor 10.5.4 is provided with an air cone and an air ring; the bottom of the upper bin body 10.5.1 is connected with a plurality of discharging cone hoppers 10.5.6, the discharging cone hoppers 10.5.6 are arranged in one-to-one correspondence with the chambered air distributors 10.5.4, and the periphery of the discharging cone hoppers 10.5.6 is provided with lower cone bins 10.5.5; the blanking cone 10.5.6 is composed of multiple segments of cone, and an annular gap is arranged between every two adjacent 2 segments of cone; the space between the lower cone bin 10.5.5 and the blanking cone hopper 10.5.6 is divided into a plurality of air supply chambers 10.5.8, and the air supply chambers 10.5.8 are communicated with a chamber-dividing air distributor 10.5.4; the cooling air ducts in the cooling air system 11.1 are connected to the central air distributor 10.5.3 via a central supply duct and to the corresponding supply chambers 10.5.8 via a plurality of plenum supply ducts.

The central air distributor 10.5.3 is arranged in the middle of the upper cabin body 10.5.1 and consists of a central air cone and a central air ring, and the central air cone is positioned above the central air ring; the central air cone consists of a vertical air pipe and a central air cap fixedly arranged above the vertical air pipe, an annular air outlet is arranged between the central air cap and the vertical air pipe, and the bottom end of the vertical air pipe is connected with a central air supply pipe; the central air ring consists of an annular air pipe and an annular air cap fixedly arranged above the annular air pipe, and an inner annular air outlet and an outer annular air outlet are arranged between the annular air cap and the annular air pipe; the annular air pipe is connected with the vertical air pipe through the inclined communicating pipe.

The chambered air distributor 10.5.4 is arranged at the lower part of the upper cabin body 10.5.1 and consists of an air cone, an upper air ring, a lower air ring and a bottom cone; the upper wind ring is arranged above the wind cone, and the lower wind ring is arranged below the wind cone; the wind cone is provided with an annular air outlet, and the upper wind ring and the lower wind ring are both provided with an inner annular air outlet and an outer annular air outlet; the upper wind ring and the lower wind ring are connected through a plurality of vertical communicating pipes, the wind cone is connected with the bottom cone barrel through a straight pipe, and the straight pipe is connected with the vertical communicating pipes through a plurality of inclined connecting pipes; the bottom cone communicates with the plenum chamber 10.5.8 through an internal transverse duct 10.5.7.

The blanking cone 10.5.6 is composed of a top cone, a middle cone and a bottom cone, the bottom of the top cone is inserted into the top of the middle cone for a distance, and the bottom of the middle cone is inserted into the top of the bottom cone for a distance; the top conical hopper and the middle conical hopper and the bottom conical hopper are respectively connected through a plurality of connecting plates uniformly arranged along the circumferential direction; the bottom of the bottom cone hopper is provided with a discharging pipe.

In this embodiment, the upper bin 10.5.1 is a square bin, the chambered air distributors 10.5.3 are 4 arranged at four corners of the upper bin 10.5.1, and the feeding cone hoppers 10.5.6 are 4 arranged correspondingly; the lower cone bin 10.5.5 is a square cone bin, a cross partition board and a diagonal partition board are arranged in the lower cone bin 10.5.5, and the space between the lower cone bin 10.5.5 and the discharging cone hopper 10.5.6 is divided into 8 separated air supply chambers.

The cooling air is fed from the lower part of the cooler 10.5, passes through the material layer in the cooler 10.5 from bottom to top and cools the material, then enters the rotary kiln 1, flows to the high end through the low end of the rotary kiln 1, then enters the preheater body to preheat the material, and finally is discharged by the preheater dust removal system 18.1.

The hydraulic system drives the corresponding equipment through hydraulic power, and is centrally arranged and uniformly managed. In this embodiment, the hydraulic system includes a heavy duty catch wheel hydraulic system 15.1 and a pre-heater system hydraulic system 15.2.

The cooling water system is used for continuously and quantitatively conveying cooling water to a plurality of devices in a large rotary kiln system to ensure the normal operation of the devices, and in the embodiment, the cooling water system mainly comprises a heavy-load riding wheel cooling water system 16.1 and a hydraulic station cooling water system 16.2 in a hydraulic system.

In this embodiment, the large rotary kiln system uses pulverized coal as fuel, and therefore the pulverized coal storage and transportation system 14 is provided to store and transport pulverized coal, wherein the pulverized coal bunker is used as a main device for storing and transporting pulverized coal.

The air cooling system is used for continuously feeding air to cool parts which are easy to heat in the large rotary kiln system. In this embodiment, the air cooling system includes a kiln head cooling fan 17.1 and a kiln tail cooling fan 17.2.

The ventilation system is used to blow air into the cooler, to provide cooling air for cooling the material, and to provide combustion air for combustion to the combustion system 13. In this embodiment, the ventilation system comprises a cooling air system 11.1 and a combustion air system 11.2.

In this embodiment, the dust removal system includes a preheater dust removal system 18.1 and a cooler dust removal system 18.2 at the outlet of the material cooling system. The combustion system 13 includes burners and burner adjusting devices. The conveying system is used for conveying the raw materials into the material distribution bin and conveying the calcined materials discharged from the material cooling system into the finished product bin, namely the conveying system comprises a feeding system 12.1 and a discharging system 12.2. The material recovery system is used for carrying out centralized treatment on materials taken out by movable parts of the rotary kiln 1 or sending the materials back to the interior of equipment, and comprises a preheater material recovery system 19.1 and a cooler material recovery system 19.2.

The temperature and pressure detection and control system 20 is a key element for realizing automatic control of the large-scale rotary kiln system, and in the embodiment, detection elements of temperature, pressure and the like are arranged at each important part of the large-scale rotary kiln system; except the material distributing bin, the equipment participating in material calcination comprises a rotary kiln body, a preheater body, a material sliding vehicle, an upper bin body of a cooler and the like, and refractory materials are built on the inner wall of the equipment.

In this embodiment, the dual-power transmission device 7 is formed by connecting a driving motor and a diesel engine in parallel, the motor or the diesel engine can be used for driving the rotary kiln according to the situation, the speed of the motor or the diesel engine is different from that of the rotary kiln, and the speed of the diesel engine for driving the rotary kiln to rotate is lower.

In a large rotary kiln system, the internal sealing between the devices is realized by material sealing. The discharging pipes 2.3 of the discharging pipe and the discharging pipe of the material cooling system 10 in the preheater system 2 are not only material channels, but also material distributing pipes, and are sealing pipes. The blanking pipe is used as a material distributing pipe to uniformly distribute materials into each material distributing bin of the preheater system, and is also used as a sealing pipe to seal a high-temperature preheater system bin body and a normal-temperature material distributing bin in a material sealing mode; in the same reason, the discharging pipe of the material cooling system not only uniformly distributes the materials in the upper bin body of the material cooling system into each discharging cone hopper for sufficient cooling, but also serves as a sealing pipe for sealing the high-temperature upper bin body with the outside through material sealing.

The composition and concrete structure of the large rotary kiln system relate to a part of the prior art, such as "novel rotary kiln supporting device" disclosed in chinese patent application with publication number CN101408373A, "novel box type hydraulic catch wheel device" disclosed in chinese patent application with publication number CN109186252A, "preheater system with multi-layer steel structure support" disclosed in chinese patent application with publication number CN114234624A, "weighing type pulverized coal bunker for large rotary kiln" disclosed in chinese patent application with publication number CN114368556A, "multidirectional adjustable burner regulator" disclosed in chinese patent application with publication number CN109210529A, "rotary kiln secondary air supply device" disclosed in chinese patent application with publication number CN110425868A, "novel hydraulic device for catch wheel control" disclosed in chinese patent application with publication number CN109026864A, etc.; the rotary kiln cooling system also relates to other patents applied on the same day, such as a low-stress rotary kiln belt wheel device and an installation method, a material cooling system of a large-scale rotary kiln and a rotary kiln cooler with an external air chamber; the devices or structures not specifically described in this embodiment are all the conventional techniques or the technical solutions disclosed in the above cited documents.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (9)

1. A large-scale rotary kiln system is characterized by comprising a rotary kiln, a preheater system, a material sliding vehicle and a material cooling system; the rotary kiln is provided with two stages of supports, a kiln body of the rotary kiln is obliquely arranged, the lower end is a kiln head end, and the higher end is a kiln tail end; the preheater system is arranged at the tail end of the kiln and comprises a material distribution bin, a preheater body and a material pushing system; a material sliding vehicle is arranged between a feed opening at the bottom of the preheater system and the inlet of the rotary kiln; the material cooling system is arranged at the end of the kiln head, the top of the material cooling system is connected with the outlet of the rotary kiln, the bottom of the material cooling system is provided with a discharge port, and a cooler with an external air chamber is arranged in the material cooling system.

2. The large-scale rotary kiln system according to claim 1, wherein the rotary kiln comprises a kiln body, a kiln head, a kiln tail, a first supporting device, a second supporting device, a propelling wheel belt, a large gear ring and a double-power transmission device; the kiln head, the kiln body and the kiln tail are sequentially connected to form a rotary kiln body; a first supporting device is arranged at one end of the kiln body close to the kiln tail, and a second supporting device is arranged at one end of the kiln body close to the kiln head; the first supporting device is provided with a heavy catch wheel and a heavy-load riding wheel group which are matched with the propelling wheel belt; the second supporting device is provided with a heavy-load riding wheel set matched with the wheel belt; a large gear ring is arranged on the kiln body between the first supporting device and the second supporting device and close to the first supporting device, and the large gear ring is connected with the double-power transmission device and transmits power; the double-power transmission device consists of a driving motor and a diesel engine which are arranged in parallel.

3. The large-scale rotary kiln system according to claim 2, wherein the heavy catch wheel is in rolling contact with the lower end conical surface of the propelling wheel belt, and the propelling wheel belt is pushed through hydraulic drive, so that the propelling wheel belt moves along the surface of the riding wheel of the heavy-duty riding wheel group and drives the kiln body to move up and down in a reciprocating manner; the high end of the propelling wheel belt at the side opposite to the heavy catch wheel is provided with an upward movement preventing device; the upward movement preventing device is a stopper and is arranged at the highest limit of the upward movement stroke of the propelling wheel belt, the heavy type catch wheel is provided with a travel switch, and the signal output end of the travel switch is connected with the signal input end of the alarm device.

4. A large rotary kiln system according to claim 2, wherein the propelling belt and the belt are loosely sleeved at corresponding positions of the outer ring of the kiln body through corresponding belt backing plates; the wheel belt backing plate comprises a floating backing plate and a stop block; and floating base plates are respectively arranged at the gap between the propelling wheel belt and the kiln body and the gap between the wheel belt and the kiln body, four edges of each floating base plate respectively extend out of the propelling wheel belt or the wheel belt and are provided with stop blocks, the floating base plates are fixedly welded with the stop blocks, and the stop blocks are fixedly welded with the kiln body.

5. A large-scale rotary kiln system according to claim 2, wherein the first and second supporting devices are provided with a screw device, and the screw device is arranged outside the supporting roller seat of the corresponding heavy-duty supporting roller set.

6. The large rotary kiln system according to claim 1, wherein the preheater system comprises a material distributing bin, a preheater body and a material pushing system; the preheater body consists of an upper annular bin and a lower conical bin; the material distributing bin is arranged at the top of the upper annular bin; the upper annular bin is of a hollow annular structure, and the interior of the upper annular bin is uniformly divided into a plurality of material distribution bins by partitions; the inner wall of the preheater body is provided with a heat insulation layer; the material pushing system consists of a plurality of groups of material pushing devices, and each group of material pushing devices and each material distributing bin are arranged at the top of the lower conical bin in a one-to-one correspondence manner.

7. A large rotary kiln system according to claim 1, wherein the material cooling system comprises a kiln head collecting cover, a sealing cover, a double-layer grate, a discharge gate, a cooler and a discharging device; the kiln head of the rotary kiln is surrounded by the kiln head collecting cover, the outer end of the kiln head of the rotary kiln is provided with the sealing cover, and the kiln head of the rotary kiln and the sealing cover as well as the kiln head collecting cover are hermetically connected; the bottom of the kiln head collecting cover is connected with a cooler through a transition bin, and a double-layer grate is arranged in the transition bin; the grid size of the upper grate in the double-layer grate is larger than that of the lower grate; the double-layer grate is obliquely arranged, and a discharge gate is arranged on one side of the transition bin corresponding to the lower end of the double-layer grate; the cooler comprises a plurality of independent cooling spaces, and the bottom of each cooling space is provided with a feed opening; the discharging device comprises a plurality of vibrating feeders and a central collecting hopper; the central material collecting hopper is arranged below the cooler corresponding to the central position of the cooler, the plurality of feed openings are connected with the central material collecting hopper through correspondingly arranged vibrating feeders, and a discharge opening is formed in the bottom of the central material collecting hopper; the bottom of the cooler is provided with a cooling air inlet which is connected with a cooling air pipeline.

8. A large rotary kiln system according to claim 7, wherein the cooler is a cooler with an external air chamber, and comprises an upper kiln body, a ring beam, a central air distributor, a chamber-divided air distributor, a lower cone kiln and a blanking cone hopper; the upper bin body is an upright silo, the top opening is a material inlet, and the bottom of the upper bin body is supported on the ring beam; the central air distributor is arranged in the center of the upper cabin body, a plurality of chambered air distributors are arranged on the periphery of the central air distributor, and the central air distributor is higher than the chambered air distributors; the central air distributor is provided with a central air cone and a central air ring, and the chambered air distributor is provided with an air cone and an air ring; the bottom of the upper bin body is connected with a plurality of discharging conical hoppers, the discharging conical hoppers and the chambered air distributor are arranged in a one-to-one correspondence manner, and the periphery of each discharging conical hopper is provided with a lower conical bin; the blanking cone hopper consists of a plurality of sections of cone hoppers, and an annular gap is arranged between every two adjacent 2 sections of cone hoppers; the space between the lower cone bin and the blanking cone hopper is divided into a plurality of air supply chambers, and the air supply chambers are communicated with a chambered air distributor; the cooling air pipeline is connected with the central air distributor through a central air supply pipe and is connected with the corresponding air supply chambers through a plurality of air chamber air supply pipes.

9. A large rotary kiln system as claimed in claim 8, wherein the central air distributor is disposed in the middle of the upper silo body and is composed of a central air cone and a central air ring, and the central air cone is located above the central air ring; the central air cone consists of a vertical air pipe and a central air cap fixedly arranged above the vertical air pipe, an annular air outlet is arranged between the central air cap and the vertical air pipe, and the bottom end of the vertical air pipe is connected with a central air supply pipe; the central air ring consists of an annular air pipe and an annular air cap fixedly arranged above the annular air pipe, and an inner annular air outlet and an outer annular air outlet are arranged between the annular air cap and the annular air pipe; the annular air pipe is connected with the vertical air pipe through the inclined communicating pipe; the chambered air distributor is arranged at the lower part of the upper bin body and consists of an air cone, an upper air ring, a lower air ring and a bottom cone; the upper wind ring is arranged above the wind cone, and the lower wind ring is arranged below the wind cone; the wind cone is provided with an annular air outlet, and the upper wind ring and the lower wind ring are both provided with an inner annular air outlet and an outer annular air outlet; the upper wind ring and the lower wind ring are connected through a plurality of vertical communicating pipes, the wind cone is connected with the bottom cone barrel through a straight pipe, and the straight pipe is connected with the vertical communicating pipes through a plurality of inclined connecting pipes; the bottom conical cylinder is communicated with the air supply chamber through an internal transverse air duct; the blanking cone hopper consists of a top cone hopper, a middle cone hopper and a bottom cone hopper, wherein the bottom of the top cone hopper is inserted into the top of the middle cone hopper for a certain distance, and the bottom of the middle cone hopper is inserted into the top of the bottom cone hopper for a certain distance; the top cone hopper is connected with the middle cone hopper and the middle cone hopper is connected with the bottom cone hopper through a plurality of connecting plates which are uniformly arranged along the circumferential direction.

Images