CN111635153B

CN111635153B - Cement firing kiln system

Info

Publication number: CN111635153B
Application number: CN202010445588.7A
Authority: CN
Inventors: 史德新; 吕峰; 杨国华
Original assignee: Cucc Nanyang Wolong Cement Co ltd
Current assignee: Cucc Nanyang Wolong Cement Co ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2022-05-13
Anticipated expiration: 2040-05-25
Also published as: CN111635153A

Abstract

The invention relates to a cement firing kiln system, comprising a rotary kiln, a feeding system and a cooling system, wherein the feeding system comprises a batching conveying mechanism, a preheating mechanism and a decomposing mechanism, raw materials enter from the batching conveying mechanism and are conveyed into the decomposing mechanism through the preheating mechanism, a smoke pipeline is arranged at the kiln head, the smoke pipeline is connected to the decomposing mechanism and enters from the decomposing mechanism to the preheating mechanism to preheat the raw materials, and the tail gas discharged after burning of the rotary kiln has higher temperature and is utilized through the preheating mechanism and the decomposing mechanism to be mixed and heated with raw materials, so that the raw materials are preheated and decomposed before entering the rotary kiln, the heat in the rotary kiln only needs to be further simply heated and decomposed, and the production efficiency of the rotary kiln is improved; meanwhile, the feeding system is also provided with a material supplementing device, and the loss of the materials before entering the rotary kiln can be supplemented through the material supplementing device, so that the production quality is improved.

Description

Cement firing kiln system

Technical Field

The invention relates to the technical field of cement production, in particular to a cement firing kiln system.

Background

In the existing cement production process, the raw material is generally burned into clinker, and then the clinker is processed to form the final cement finished product. The burning of the existing raw material is generally carried out by adopting a rotary kiln, the raw material needs to be heated, decomposed and burned in the rotary kiln, and when the raw material is heated and decomposed, a large amount of heat of the rotary kiln needs to be consumed, so that the burning efficiency is reduced.

Chinese patent publication No. CN104903671A discloses a cement production system provided with a preheater for preheating cement raw materials, a calciner for precalcining the preheated cement raw materials, and a rotary kiln for burning the precalcined cement raw materials, which preheats and precalcinates the cement raw materials through exhaust gas of the rotary kiln, thereby improving the efficiency of cement production.

However, when the system is in production, the cyclone preheater is adopted to calcine the cement raw meal, the cement raw meal and the waste gas in the cyclone preheater are directly mixed together to be heated, then the bottom discharge is carried out, the top is given vent to anger, separate the material from the gas, when separating, although the separation efficiency of the cyclone preheater is higher, but when separating, it can be influenced by the gravity of molecules, thereby the material can not be completely separated, simultaneously can be because the components of the material particles are different, the weight of the particles with the same volume is different, therefore, the separation of the lighter material is more difficult, even the part is taken away by the flue gas, thereby the raw meal ratio in the whole preheating process is influenced, thereby the cement quality is influenced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a cement firing kiln system capable of improving the production quality.

The above object of the present invention is achieved by the following technical solutions:

a cement firing kiln system comprises a rotary kiln, a feeding system arranged at the tail of the rotary kiln and a cooling system arranged at the head of the rotary kiln, wherein the feeding system comprises a batching conveying mechanism, a preheating mechanism and a decomposing mechanism;

the feeding system is further provided with a feeding device, the feeding device comprises a tailing analyzer arranged on the smoke guide pipe, a feeding conveying device for conveying the raw materials to the preheating mechanism, a feeding analyzer arranged on the feeding conveying device and a controller for controlling the feeding conveying device to convey the amount of the raw materials, and the controller is in communication connection with the tailing analyzer and the feeding analyzer respectively and controls the feeding conveying device to convey the raw materials.

Through adopting above-mentioned technical scheme, because the rotary kiln burns the exhaust tail gas of back and has higher temperature, through introducing feed system with tail gas, utilize tail gas through preheating mechanism and decomposition mechanism, let tail gas and raw meal carry out the hybrid heating to let the raw meal preheat and decompose before entering into the rotary kiln, thereby heat in the rotary kiln only need further simple hot and decompose can, improved the production efficiency of rotary kiln. Meanwhile, materials taken away by smoke can be replenished again through the material supplementing device, so that the proportion cannot be changed greatly, the cement quality is stable, the materials taken away by the tail material analyzer can be analyzed, and the materials are conveyed into the tail material analyzer through the material supplementing conveying device to achieve the purpose of supplementing.

The present invention in a preferred example may be further configured to: the feeding material conveying device comprises a feeding material cylinder, a feeding material pipe and a first quantitative conveyor arranged on the feeding material pipe, the feeding material cylinder is connected with the feeding material conveying mechanism, the feeding material pipe is respectively connected with the feeding material cylinder and the decomposing mechanism, and the feeding material analyzer is arranged between the first quantitative conveyor and the decomposing mechanism.

By adopting the technical scheme, the material supplementing cylinder can store materials, and the supplemented materials are conveyed into the decomposing mechanism through the material supplementing pipe and the first quantitative conveyor.

The present invention in a preferred example may be further configured to: and a second quantitative conveyor is also arranged between the feeding analyzer and the feeding cylinder.

By adopting the technical scheme, the second quantitative conveyor is matched with the first quantitative conveyor to convey the materials to the decomposition mechanism uniformly and quantitatively.

The present invention in a preferred example may be further configured to: the first quantitative conveyor and the second quantitative conveyor are identical in structure and are formed by impeller air locking conveying mechanisms.

By adopting the technical scheme, the two quantitative conveyors are adopted, and the two quantitative conveyors are formed by adopting the impeller air locking conveying mechanism, so that the quantitative conveyors are not influenced by the air pressure of the decomposing mechanism when conveying materials.

The present invention in a preferred example may be further configured to: and a heating device is arranged between the material supplementing pipe and the decomposing mechanism.

Through adopting above-mentioned technical scheme, heating device can heat the material of feed supplement system to can let the decomposition mechanism need not heat the material of replenishment, and then let its preheat relatively perfect.

The present invention in a preferred example may be further configured to: batching conveying mechanism deposits the pond including batching blanking machine, rubbing crusher and raw materials, the raw materials is deposited the pond and is connected preheat the mechanism.

Through adopting above-mentioned technical scheme, the batching blanking machine can carry out the unloading with raw materials collocation, simultaneously, smashes through the rubbing crusher, deposits the pond through the raw materials at last and saves.

The present invention in a preferred example may be further configured to: the batching and conveying mechanism comprises a plurality of crushers, a plurality of raw material crushing storage barrels respectively connected with the crushers, a powder proportioning machine connected with each raw material crushing storage barrel and a mixing barrel connected with the powder proportioning machine, wherein the crushers and the raw material crushing storage barrels are arranged in the same quantity as the raw materials.

Through adopting above-mentioned technical scheme, smash earlier every raw materials and deposit, at last mix through powder proportioning machine again, mix through the churn at last.

The present invention in a preferred example may be further configured to: the preheating mechanism is composed of a plurality of multi-stage cyclone preheaters consisting of a plurality of cyclone preheaters, each cyclone preheater comprises a barrel body, a bottom discharging channel, a top air outlet channel and a side air inlet channel are mounted on each barrel body, smoke and powder enter from the side air inlet channels, and the smoke flows out from the top air outlet channels and the powder flows out from the bottom discharging channels.

Through adopting above-mentioned technical scheme, cyclone preheater can let powder and steam intensive mixing, and the heat transfer is complete, and the mode of whirlwind structure lets its separation more convenient simultaneously.

The present invention in a preferred example may be further configured to: the dust separation device is arranged in the barrel body and is communicated with the top air outlet channel, and the bottom material blocking device is arranged on the bottom material outlet channel.

Through adopting above-mentioned technical scheme, the material as much as possible in the hot gas can be with the separation of dust separation subassembly, lets it can not taken away.

The present invention in a preferred example may be further configured to: dust separation subassembly includes air inlet separation groove, delay groove and air-out groove, goes out air-out groove and top air-out passageway UNICOM, air inlet separation groove is certain angle setting with the air-out groove, and the position that air-out groove and delay groove are connected is close to the setting of air separation groove.

Through adopting above-mentioned technical scheme, the delay groove can be after air inlet separation groove feeding, because it need go out from the air-out groove to the air needs turn, and the material can enter into the delay groove because of inertia because of gravity reason, thereby accomplishes the separation, reaches the purpose that the prevention and cure material was taken out.

In summary, the invention includes at least one of the following beneficial technical effects:

1. the tail gas and the raw meal are mixed and heated, so that the raw meal is preheated and decomposed before entering the rotary kiln, the heat in the rotary kiln only needs to be further simply heated and decomposed, and the production efficiency of the rotary kiln is improved;

2. a part of raw materials carried out by the tail gas can be detected by adopting the material supplementing system, so that the raw materials can be supplemented to the decomposition mechanism and can be complete;

3. the raw materials are divided into a plurality of barrels, and can be purposefully supplemented during feeding.

Drawings

Fig. 1 is a block diagram of the procedure of embodiment 1.

Fig. 2 is a structural view of a preheating mechanism installed at the kiln tail of the rotary kiln in embodiment 1.

FIG. 3 is a feed control program.

FIG. 4 is a schematic diagram of a feed delivery apparatus.

Fig. 5 is a block diagram of the procedure of embodiment 2.

FIG. 6 is a longitudinal sectional view of a cyclone preheater in example 3.

FIG. 7 is a cross-sectional view of a cyclone preheater.

Fig. 8 is an enlarged view at a in fig. 7.

Reference numerals: 1. a rotary kiln; 11. a flue gas duct; 2. a cooling system; 31. a material proportioning and discharging machine; 32. a pulverizer; 33. a raw material storage tank; 34. a raw material crushing storage cylinder; 35. a mixing drum; 36. a powder proportioning machine; 4. a preheating mechanism; 41. a 1-stage preheating cylinder; 42. a 2-stage preheating cylinder; 43. a 3-stage preheating cylinder; 44. a bottom discharge channel; 45. a top air outlet channel; 46. a side air inlet channel; 47. a flue gas guide duct; 48. a cooling device; 49. a cyclone separator; 5. a disassembly mechanism; 61. a tailings analyzer; 62. a supplementary material conveying device; 621. a material supplementing barrel; 622. a material supplementing pipe; 623. a first dosing conveyor; 624. a heating device; 625. a heat-supplementing pipeline; 626. a second quantitative conveyor; 627. a housing; 628. an impeller; 63. a feeding analyzer; 64. a controller; 65. feeding and blanking machines; 7. a barrel body; 8. a dust barrier assembly; 81. an air intake blocking groove; 82. a retention tank; 83. an air outlet groove; 9. a bottom blocking device; 91. and (4) discharging the pipe.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1: a cement burning kiln system is shown in figure 1 and comprises a rotary kiln 1, a feeding system arranged at the tail of the rotary kiln 1 and a cooling system 2 arranged at the head of the rotary kiln 1, wherein raw materials enter the rotary kiln 1 through the feeding system, are burnt through the rotary kiln 1 and are discharged through the cooling system 2, the burning process is completed, and cement raw materials are burnt into clinker. When calcining, the raw materials need to carry out heating decomposition, therefore, feed system is including being used for the crushing quantitative batching conveying mechanism of raw materials, preheat mechanism 4 and decomposition mechanism 5, wherein, decomposition mechanism 5 direct mount is on the kiln tail of rotary kiln 1, the raw materials carries out to grind behind the batching conveying mechanism and feeds into preheating mechanism 4 and preheat in, finally in 5 nearly income rotary kiln 1 of decomposition mechanism, the raw materials preheats and decomposes at preheating mechanism 4 and decomposition mechanism 5, thereby let it when entering into rotary kiln 1, the raw materials has possessed certain temperature, and it has carried out preliminary decomposition, thereby rotary kiln 1's calcination efficiency has been improved.

As shown in fig. 1, the batching and conveying mechanism includes a batching and feeding machine 31, a crusher 32 and a raw material storage tank 33, and each batching is conveyed to a conveyor belt by the batching and feeding machine 31 in proportion, then conveyed to the crusher 32 by the conveyor belt for crushing, and conveyed to the raw material storage tank 33 for storage after crushing. After crushing, because there is the difference in the quality of raw materials, need carry out the homogenization before burning at the material after crushing, consequently, deposit in raw materials storage tank 33 and carry out the homogenization, evenly tile after the raw materials are carried over, tile up in proper order, and when getting the material, directly get the material in the longitudinal direction.

As shown in fig. 1 and 2, after the raw material is homogenized, the raw material is conveyed to a preheating mechanism 4 for preheating, the preheating mechanism 4 is composed of a plurality of cyclone preheaters, each cyclone preheater is composed of a plurality of cyclone preheaters, a bottom discharging channel 44, a top air outlet channel 45 and a side air inlet channel 46 are arranged on each cyclone preheater, and cyclone is formed through the side air inlet channel 46. The cyclone preheater comprises a 1-stage preheating cylinder 41, a 2-stage preheating cylinder 42 and a 3-stage preheating cylinder 43 according to the arrangement positions, wherein a plurality of 2-stage preheating cylinders 42 can be arranged, a feed pipe is inserted into a side air inlet channel 46 of the 1-stage preheating cylinder 41, homogenized raw materials are guided into the 1-stage preheating cylinder 41 from the feed pipe through a raw material conveyor (a conveying belt or a lifter is not shown in the figure in cooperation with a charging barrel), the raw materials are generally and directly fed into the side air inlet channel 46 of the 1-stage preheating cylinder 41 for feeding, a bottom discharge channel 44 of the 1-stage preheating cylinder 41 is inserted into and communicated with the side air inlet channel 46 of the 2-stage preheating cylinder 42, a top air outlet channel 45 of the 2-stage preheating cylinder 42 is communicated with the side air inlet channel 46 of the 1-stage preheating cylinder 41, a bottom discharge channel 44 of the 2-stage preheating cylinder 42 is inserted into and communicated with the side air inlet channel 46 of the 3-stage preheating cylinder 43, raw materials in the 2-stage preheating cylinder 42 are guided into the 3-stage preheating cylinder 43, a bottom discharging channel 44 of the 3-stage preheating cylinder 43 is connected with the decomposing mechanism 5, the preheated raw materials are guided into the decomposing mechanism 5 to be decomposed, a flue gas outlet is formed in the decomposing mechanism 5, and the flue gas outlet is directly communicated with a side air inlet channel 46 of the 3-stage preheating cylinder 43. Wherein, decomposition mechanism 5 can adopt the dore to constitute, and simultaneously, the flue gas that the kiln head of rotary kiln 1 produced is direct to be led into decomposition mechanism 5 through setting up flue gas pipeline 11 in to the flue gas is discharged 3 grades of preheating section of thick bamboo 43, 2 grades of preheating section of thick bamboo 42, 1 grades of preheating section of thick bamboo 41 by decomposition mechanism 5 in proper order, thereby lets the waste heat of flue gas preheat the raw materials. A flue gas guide pipeline 47 is connected with a top air outlet channel 45 on the 1-stage preheating cylinder 41, a cooling device 48 and a cyclone separator 49 are arranged on the flue gas guide pipeline 47, and tailings at the bottom of the cyclone separator 49 are conveyed into a raw material conveyor.

When the raw materials in the mechanism 4 is preheated to the flue gas, directly let in during the flue gas and preheat inside mechanism 4, consequently, preheat the influence that the raw materials in the mechanism 4 can receive the flue gas and flow back along with the flue gas, in cyclone preheater, because the raw materials is tiny powder structure, it is when cyclone, can take away partly raw materials, its quality of the less particle of quality is less, thereby its inertia is also less, thereby the separation is incomplete more, consequently most material can be taken away by the flue gas, lead to finally entering into the raw materials ratio in the rotary kiln 1 and take place slight change, thereby lead to the product quality to reduce.

In order to solve the problem that the proportioning is influenced in the preheating process, a material supplementing device is arranged at the position of the preheating mechanism 4, as shown in fig. 1 and 3, the feeding device comprises a tail analyzer 61 installed on the flue gas guide pipe 47, a feeding conveyer 62 for conveying the raw material to the preheating mechanism 4, a feeding analyzer 63 installed on the feeding conveyer 62, and a controller 64 for controlling the amount of the raw material conveyed by the feeding conveyer 62, the controller 64 is respectively connected with the tail analyzer 61 and the feeding analyzer 63 in communication, that is, the controller 64 receives the data from the tailing analyzer 61, controls the feeding conveyer 62 to convey the amount of the raw material, meanwhile, the feeding analyzer 63 is connected with the controller 64 to determine whether the feeding amount is accurate, and then make the raw materials ratio that finally enters into rotary kiln 1 comparatively accurate, reach the purpose of improving the quality of whole processing.

As shown in FIGS. 2 and 4, the feed supplement delivery apparatus 62 comprises a feed supplement cylinder 621, a feed supplement pipe 622, and a first quantitative conveyor 623 mounted on the feed supplement pipe 622, the feed supplement cylinder 621 stores the raw material and can be directly connected to the raw material storage tank 33, the feed supplement pipe 622 is connected to the feed supplement cylinder 621 at one end and to the decomposition mechanism 5 at the other end, and a feed supplement analyzer 63 is mounted between the first quantitative conveyor 623 and the decomposition mechanism 5. In order to make the supplementary raw material entering the decomposition mechanism 5 have a certain temperature, a heating device 624 is arranged at the position entering the decomposition mechanism 5, the heat source of the heating device 624 is directly connected with the smoke at the kiln head position of the rotary kiln 1, namely, a heat supplementing pipeline 625 is arranged at the kiln head position, the heating device 624 is directly formed by winding the heat supplementing pipeline 625 on a material supplementing pipe 622, the material supplementing pipe 622 is obliquely arranged, one end of the material supplementing pipe 622 with a high horizontal position is connected with a material supplementing cylinder 621, and the other end of the material supplementing pipe 622 is communicated with the decomposition mechanism 5. In order to reduce the influence of the decomposing mechanism 5 on the feeding analyzer 63, a second quantitative conveyor 626 is provided between the feeding heating pipe and the feeding pipe 622, the first quantitative conveyor 623 and the second quantitative conveyor 626 rotate synchronously and are connected with the controller 64, and the feeding analyzer 63 is installed between the first quantitative conveyor 623 and the second quantitative conveyor 626.

The first quantitative conveyor 623 and the second quantitative conveyor 626 have the same structure, that is, both are formed by an impeller air-locking conveying mechanism, the impeller air-locking conveying mechanism comprises a housing 627 mounted on the material supplementing pipe 622 and an impeller 628 mounted in the housing 627, the impeller 628 is in abutting seal with the housing 627 when rotating, so that two ends of the impeller are in an isolated state, the materials are quantitatively conveyed through intervals on the impeller 628, and the impeller 628 can be driven by a motor.

Both the feed analyzer 63 and the tailings analyzer 61 may employ neutron activation analyzers.

In addition, the tail gas that discharges in this system carries out centralized processing through tail gas processing system again at last.

Example 2: a cement kiln system, as shown in FIG. 5, is substantially the same in structure as that of example 1, and is different in that the raw materials are treated, and in example 2, each raw material is crushed separately before being homogenized and stirred, that is, a plurality of sets of a material crusher 31 (which may not be provided) and a plurality of a material crusher 32 are provided, the number of the sets being the same as the number of the raw materials, and a material crushing storage tube 34 and a stirring tube 35 are provided, the number of the material crushing storage tubes 34 being the same as the number of the raw materials, and the crushed raw materials are sequentially put into the corresponding material crushing storage tubes 34, and a powder proportioning machine 36 is provided, which can be directly configured in the same manner as the material crusher 31, and is conveyed into the stirring tube 35 by a conveyor belt to be mixed and then conveyed to a raw material stacking tank to be stored.

Meanwhile, in embodiment 2, the material supplementing cylinder 621 can be directly replaced by the raw material pulverizing storage cylinder 34, the material supplementing blanking machine 65 is disposed between the material supplementing pipe 622 and the material supplementing cylinder 621, meanwhile, the material supplementing blanking machine 65 can also be formed by the material preparing blanking machine 31 in embodiment 1, when a plurality of raw materials are missing and need to be prepared, the stirring cylinder 35 is disposed at the position of the material supplementing blanking machine 65 for stirring, and then the raw materials enter the material supplementing conveying device 62.

Example 3: a cement burning kiln system mainly lies in that the structure of a cyclone preheater is different (the structure can also be applied to a cyclone separator 49), and referring to fig. 6, the cement burning kiln system is a sectional view of the cyclone preheater and comprises a barrel body 7, and a dust blocking assembly 8 and a bottom blocking device 9 are arranged inside the barrel body 7. Wherein, referring to fig. 7 and 8, the dust separation assembly 8 includes an air inlet separation groove 81, a retention groove 82 and an air outlet groove 83, and the air outlet groove 83 is communicated with the top air outlet channel 45. The air inlet blocking groove 81 and the air outlet groove 83 are arranged at a certain angle, and meanwhile, the air outlet groove 83 and the retention groove 82 are connected close to the air inlet blocking groove 81. Typically, the retention groove 82 is provided as a seal groove. The included angle between the common wind blocking groove and the wind outlet groove 83 is smaller than 90 degrees, so that when air turns rapidly, the powder is thrown out under the action of inertia due to the fact that the gravity of the powder is large, the powder enters the retention groove 82, the retention groove 82 is a sealing groove, and the air flow in the retention groove 82 is stable, so that the powder or chips cannot be brought into the wind outlet groove 83 again. Inside discharging pipe 91 that sets up of bottom discharging channel 44, rethread detention groove 82 bottom UNICOM discharging pipe 91, simultaneously, in order to let detention groove 82 keep encapsulated situation, set up bottom on bottom discharging channel 44 and hinder material device 9, it adopts impeller lock wind conveying mechanism to constitute. An impeller air-lock conveying mechanism (not shown) may be provided directly on the discharge pipe 91. The impeller airlock delivery mechanism is the same as in embodiment 1 and therefore will not be described in detail.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a cement kiln system of firing, includes rotary kiln (1), installs feed system at the kiln tail of rotary kiln (1) and installs cooling system (2) at the kiln head of rotary kiln (1), its characterized in that: the feeding system comprises a batching conveying mechanism, a preheating mechanism (4) and a decomposing mechanism (5), the decomposing mechanism (5) is installed at the tail of the kiln, raw materials enter from the batching conveying mechanism and are conveyed into the decomposing mechanism (5) through the preheating mechanism (4), a flue gas pipeline (11) is installed at the head of the kiln, the flue gas pipeline (11) is connected to the decomposing mechanism (5) and enters the preheating mechanism (4) through the decomposing mechanism (5) to preheat the raw materials, and the preheating mechanism (4) is provided with a flue gas guide pipeline (47) for guiding out the entering flue gas;

the material supplementing device is arranged at the position of the preheating mechanism (4) and comprises a tailing analyzer (61) arranged on a flue gas guide pipeline (47), a material supplementing conveying device (62) for conveying raw materials to the preheating mechanism (4), a material supplementing analyzer (63) arranged on the material supplementing conveying device (62) and a controller (64) for controlling the amount of the raw materials conveyed by the material supplementing conveying device (62), wherein the controller (64) is respectively in communication connection with the tailing analyzer (61) and the material supplementing analyzer (63) and controls the material supplementing conveying device (62) to convey, the material supplementing conveying device (62) comprises a material supplementing cylinder (621), a material supplementing pipe (622) and a first quantitative conveyor (623) arranged on the material supplementing pipe (622), the material supplementing cylinder (621) is connected with the material supplementing conveying mechanism, and the material supplementing pipe (622) is respectively connected with the material supplementing cylinder (621) and the decomposing mechanism (5), the feeding analyzer (63) is arranged between the first quantitative conveyor (623) and the decomposition mechanism (5); a heating device (624) is arranged at the position, close to the decomposing mechanism (5), of the material supplementing pipe (622);

the preheating mechanism (4) is composed of a multi-stage cyclone preheater consisting of a plurality of cyclone preheaters, the cyclone preheaters comprise a barrel body (7), a bottom discharging channel (44), a top air outlet channel (45) and a side air inlet channel (46) are mounted on the barrel body (7), smoke and powder enter from the side air inlet channel (46), the smoke flows out from the top air outlet channel (45) and the powder flows out from the bottom discharging channel (44);

a dust blocking assembly (8) and a bottom blocking device (9) are arranged inside the barrel body (7), the dust blocking assembly (8) is installed at the position of the top air outlet channel (45) and communicated with the top air outlet channel (45), and the bottom blocking device (9) is installed on the bottom discharging channel (44);

dust separation subassembly (8) are including air inlet separation groove (81), delay groove (82) and air-out groove (83), air-out groove (83) and top air-out passageway (45) UNICOM, air inlet separation groove (81) are certain angle setting with air-out groove (83), and air-out groove (83) are close to the setting of air-out separation groove with the position that delay groove (82) is connected.

2. The cement-firing kiln system as recited in claim 1, wherein: a second quantitative conveyor (626) is also arranged between the feeding analyzer (63) and the feeding cylinder (621).

3. The cement-firing kiln system as recited in claim 2, wherein: the first quantitative conveyor (623) and the second quantitative conveyor (626) have the same structure and are formed by impeller air locking conveying mechanisms.

4. The cement-firing kiln system as recited in claim 1, wherein: batching conveying mechanism deposits pond (33) including batching blanking machine (31), rubbing crusher (32) and raw materials, raw materials are deposited pond (33) and are connected preheat mechanism (4).

5. The cement-firing kiln system as recited in claim 1, wherein: the batching and conveying mechanism comprises a plurality of crushers (32), a plurality of raw material crushing storage barrels (34) respectively connected with the crushers (32), a powder batching machine (36) all connected with each raw material crushing storage barrel (34) and a mixing barrel (35) connected with the powder batching machine (36), wherein the crushers (32) and the raw material crushing storage barrels (34) are arranged in the same quantity as the raw materials.