Dry-process cement clinker sintering device

Abstract

The utility model provides a dry process cement clinker firing device which comprises a preheating mechanism, a decomposing furnace, a material spraying assembly, a rotary kiln and a cooling machine, the preheating mechanism is used for preheating raw materials, the decomposing furnace is connected with the preheating mechanism, the decomposing furnace is used for receiving and decomposing the preheated raw materials, the material spraying assembly is connected with the decomposing furnace, and the rotary kiln is connected with the cooling machine. The material spraying assembly is used for evenly spraying preheated raw materials into the rotary kiln, the rotary kiln is used for calcining the raw materials to form clinker, the rotary kiln sequentially comprises a shell, at least two heat insulation layers and a heat-resistant lining from outside to inside, and the cooling machine is used for cooling the clinker. Due to the fact that the material spraying assembly evenly sprays the preheated raw materials into the rotary kiln, the raw materials can be heated more sufficiently and evenly in the rotary kiln, the calcining process is more thorough, and the clinker quality is further guaranteed. In addition, due to the fact that the rotary kiln comprises at least two heat insulation layers, the heat insulation effect of the rotary kiln is better, and the calcination process is more thorough.

Description

TECHNICAL FIELD

[0001] The utility model relates to cement clinker technical field, especially relate to a dry process cement clinker firing device. BACKGROUND

[0002] Cement clinker is the semi-finished product in the production process of Portland cement, and the main components are calcium oxide, silicon dioxide, and a small amount of aluminum oxide and iron oxide, and the main mineral composition is calcium oxide and silicon dioxide complexed to form tricalcium silicate, aluminum oxide and calcium oxide complexed to form chlorate tricalcium calcium, calcium oxide and iron oxide, aluminum oxide complexed to form iron aluminate calcium. After sintering complexed cement clinker, grind the appropriate amount of gypsum together in a specific ratio, and Portland cement is obtained.

[0003] The sintering of cement clinker starts from raw materials, as the temperature rises, the raw material kaolin is dehydrated to become silicon dioxide and aluminum oxide, the raw material limestone is decomposed to become calcium oxide, and after the material appears liquid phase, calcium oxide is complexed with silicon dioxide to adsorb free calcium oxide to become tricalcium silicate, and after cooling, it is Portland cement clinker. In the sintering process of cement clinker, the raw materials are preheated by a preheater, the limestone carbonate is decomposed by a decomposition furnace, and the solid phase reaction is carried out by a rotary kiln. These devices constitute the system of cement clinker sintering. However, when the raw materials are calcined into clinker in the rotary kiln, the calcination is not thorough enough, which affects the quality of the clinker. UTILITY MODEL CONTENTS

[0004] Therefore, the main purpose of the utility model is to provide a dry process cement clinker firing device that can more thoroughly calcine raw materials.

[0005] To achieve the above-mentioned purpose, the utility model provides a dry process cement clinker firing device, which comprises:

[0006] A preheating mechanism is used to preheat raw materials.

[0007] A decomposition furnace is connected with the preheating mechanism, and the decomposition furnace is located below the preheating mechanism. The decomposition furnace is used to receive and decompose the preheated raw materials.

[0008] A material spraying assembly is connected with the decomposition furnace.

[0009] A rotary kiln is connected with one end of the decomposition furnace away from the decomposition furnace, and the rotary kiln is located below the decomposition furnace. The rotary kiln is used to calcine the raw materials to form clinker. The rotary kiln comprises an outer shell, at least two layers of heat insulation layer and heat-resistant inner lining from the outside to the inside.

[0010] A cooling machine is used to cool the clinker.

[0011] The material spraying assembly is used for spraying the preheated raw material evenly in the rotary kiln.

[0012] Preferably, the material spraying assembly comprises a material spraying pipeline and a raw material sprayer arranged in the material spraying pipeline, and the raw material spraying pipeline is communicated with the decomposing furnace and the rotary kiln.

[0013] Preferably, the preheating mechanism comprises a spouted bed preheater and a cyclone vertical cylinder preheater arranged in sequence from top to bottom, the spouted bed preheater is provided with a plurality of spouted plates, and the spouted plates are provided with a plurality of spouting holes, the spouted bed preheater is used for preheating and dispersing the raw material, and the cyclone vertical cylinder preheater is used for secondary preheating the raw material.

[0014] Preferably, the shell is made of steel plate material, and the heat-resistant lining is made of clay brick, magnesium-aluminum spinel brick, phosphate brick or refractory castable material.

[0015] Preferably, the heat insulation layer is made of ceramic fiber, aluminum silicate fiber, light plate, multi-layer plate, refractory brick, refractory castable material, heat insulation brick or ceramsite insulation board, and the materials of at least two layers of the heat insulation layer are different.

[0016] Preferably, the dry-process cement clinker calcining device further comprises an oxygen-enriched providing member, output ends of output pipes of the oxygen-enriched providing member are respectively communicated with the decomposing furnace and the rotary kiln, and the oxygen-enriched providing member is used for providing oxygen-enriched air for the decomposing furnace and the rotary kiln.

[0017] Preferably, an adjusting valve for adjusting the opening degree of the output pipe is arranged on the output pipe.

[0018] Preferably, the rotary kiln comprises a burner, and the dry-process cement clinker calcining device further comprises a fuel sprayer used for spraying fuel in the burner, and the burner is used for spraying and igniting the fuel to form heat energy for calcining the raw material in the rotary kiln.

[0019] Preferably, the dry-process cement clinker calcining device further comprises a driving assembly in transmission connection with the rotary kiln, and the driving assembly is used for driving the rotary kiln to rotate.

[0020] Preferably, the driving assembly comprises a driving member and a gear arranged on the driving member, the gear is engaged with the rotary kiln, and the driving member is used for driving the gear to rotate to drive the rotary kiln to rotate.

[0021] The advantages of this utility model's technical solution are as follows: When cement clinker needs to be produced, raw meal is added to a preheating mechanism, which preheats the raw meal. The preheated raw meal is then transferred to a decomposition furnace for decomposition. A spraying assembly evenly sprays the decomposed raw meal into a rotary kiln, where it is calcined to form clinker. Finally, a cooler cools the clinker. Because the spraying assembly evenly sprays the preheated raw meal into the rotary kiln, the raw meal is heated more thoroughly and evenly, resulting in a more complete calcination process and ensuring clinker quality. Furthermore, since the rotary kiln includes at least two insulation layers, its heat insulation effect is better, further ensuring a more complete calcination process. The better insulation also reduces heat loss and increases energy efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the devices shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a dry-process cement clinker calcination apparatus according to an embodiment;

[0024] Figure 2 A cross-sectional view of a rotary kiln according to one embodiment;

[0025] Among them, 100 is the preheating mechanism; 110 is the spray bed preheater; 120 is the cyclone vertical cylinder preheater; 200 is the decomposition furnace; 300 is the injection assembly; 310 is the injection pipe; 320 is the raw material injector; 400 is the rotary kiln; 410 is the outer shell; 420 is the heat insulation layer; 430 is the heat-resistant lining; 440 is the combustion zone; 450 is the sintering zone; 460 is the cooling zone; 470 is the burner; 500 is the cooler; 600 is the oxygen-enriched supply component; 610 is the output pipe; 611 is the regulating valve; 700 is the drive assembly; 710 is the drive component; and 720 is the gear.

[0026] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. In addition, the description of "first", "second", etc. in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three schemes, for example, A and / or B includes A technical scheme, B technical scheme, and A and B simultaneously meet the technical scheme; in addition, the technical schemes of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skill in the art, when the combination of technical schemes appears contradictory or unachievable, it should be considered that the combination of technical schemes does not exist, and is not within the protection scope required by the present application.

[0029] As Figure 1 and Figure 2 shown, a dry cement clinker calcining device includes a preheating mechanism 100, a decomposing furnace 200, a material spraying assembly 300, a rotary kiln 400 and a cooler 500. The preheating mechanism 100 is used for preheating raw materials. The decomposing furnace 200 is connected with the preheating mechanism 100 and is located below the preheating mechanism 100. The decomposing furnace 200 is used for receiving and decomposing the preheated raw materials. The material spraying assembly 300 is connected with the decomposing furnace 200. The rotary kiln 400 is connected with one end of the decomposing furnace 200 away from the decomposing furnace 200 and is located below the decomposing furnace 200. The material spraying assembly 300 is used for uniformly spraying the preheated raw materials into the rotary kiln 400. The rotary kiln 400 is used for calcining the raw materials to form clinker. The rotary kiln 400 includes, from the outside to the inside, an outer shell 410, at least two layers of heat insulation layers 420 and a heat-resistant inner lining 430. The cooler 500 is used for cooling the clinker.

[0030] When the cement clinker needs to be sintered, the raw meal is added to the preheating mechanism 100, the preheating mechanism 100 preheats the raw meal, the preheated raw meal is transmitted to the decomposing furnace 200, the decomposing furnace 200 performs a decomposing treatment on the preheated raw meal, the material spraying assembly 300 uniformly sprays the decomposed raw meal into the rotary kiln 400, the rotary kiln 400 calcines the raw meal to form the clinker, and then the cooler 500 cools the clinker. Since the material spraying assembly 300 uniformly sprays the preheated raw meal into the rotary kiln 400, the raw meal is heated more fully and uniformly in the rotary kiln 400, that is, the calcination process is more complete, thereby ensuring the quality of the clinker. In addition, since the rotary kiln 400 includes at least two layers of heat insulation layers 420, the heat insulation effect of the rotary kiln 400 is better, the calcination process is further more complete, and since the heat insulation effect is better, the heat loss is less, and it is more energy-saving.

[0031] Specifically, the decomposing furnace 200 can uniformly distribute the raw meal in the cement production, prolong the material residence time, improve the fuel combustion rate, thereby maintaining the equipment temperature within a specified range; the cooler 500 is responsible for rapidly cooling the high-temperature clinker, preventing the growth of mineral crystals, and improving the physical properties of the clinker, and the cooler 500 cools the high-temperature clinker, which is conducive to the transportation, storage and grinding of the clinker.

[0032] In the embodiment, the raw meal includes limestone, clay and iron raw materials, wherein the iron raw material is iron ore or bauxite, etc. Further, the raw meal further includes auxiliary raw materials, the auxiliary raw materials include sand, iron dust, fly ash, coal gangue, quicklime, etc., and the auxiliary raw materials play a role in adjusting and optimizing the performance of the raw meal in the grinding process.

[0033] In the embodiment, the raw meal is transported to the heat-resistant inner lining 430 of the rotary kiln 400 through the material spraying assembly 300. When the rotary kiln 400 calcines the raw meal, the following steps are included: when the temperature of the raw meal rises to 100-150℃, the free water in the raw meal is completely removed; when the temperature rises to 450℃, the main component of clay, kaolin (Al2O3·2SiO2·2H2O), undergoes a dehydration reaction to remove the chemically combined water, and this process is an endothermic process. Al2O3·2SiO2·2H2O = Al2O3(amorphous) + 2SiO2(amorphous) + 2H2O. After dehydration, it becomes amorphous aluminum trioxide and silicon dioxide, which have high activity; when it rises to 600℃, the calcium carbonate in the limestone and the magnesium carbonate in the raw material are decomposed. Under a CO2 partial pressure of one atmosphere, the decomposition temperatures of magnesium carbonate and calcium carbonate are 750℃ and 900℃, respectively. The reaction process starts from the decomposition of the raw material, and the free calcium oxide with active properties appears in the material, which reacts with SiO, AlO and FeO in the raw meal to form clinker minerals; then, the solid-phase reaction is carried out, and various mineral components in the raw meal undergo complex physical and chemical reactions at high temperatures to form main minerals of cement clinker, such as tricalcium silicate, dicalcium silicate, tricalcium aluminate and tetracalcium aluminoferrite; finally, the clinker is sintered, and the sintering temperature is usually between 1300-1450℃, which is called the firing temperature range. At 1450℃, the reaction is rapid, so this temperature is also called the firing temperature. In order to make the reaction complete, a certain time is also needed, which is usually 15-25 minutes.

[0034] Reference Figure 1 The preheating mechanism 100 includes a spouted bed preheater 110 and a cyclone vertical cylinder preheater 120 arranged in sequence from top to bottom. The spouted bed preheater 110 is provided with multiple layers of spouted plates, and the spouted plates are provided with multiple spouted holes. The spouted bed preheater 110 is used for preheating and dispersing the raw meal, and the cyclone vertical cylinder preheater 120 is used for secondary preheating of the raw meal.

[0035] Reference Figure 1 The material spraying assembly 300 includes a material spraying pipeline 310 and a raw meal sprayer 320 arranged on the material spraying pipeline 310. The raw meal spraying pipeline 310 is connected with the decomposition furnace 200 and the rotary kiln 400. Specifically, the raw meal is dispersed into the rotary kiln 400 through the action of the raw meal sprayer 320, so that the raw meal is heated more uniformly in the rotary kiln 400 and calcined more completely.

[0036] The shell 410 of the rotary kiln 400 is made of steel plate material, which has high high-temperature resistance and corrosion resistance, can withstand high-temperature chemical reactions and thermal expansion, and ensures the stable operation of the rotary kiln 400. In this embodiment, the shell 410 of the rotary kiln 400 is made of steel plate with a thickness of about 40 mm; the heat-resistant lining 430 of the rotary kiln 400 is made of clay brick, magnesia-alumina spinel brick, phosphate brick, or refractory castable. In this embodiment, the heat-resistant lining 430 is made of phosphate brick, which has good fire resistance and thermal stability.

[0037] The heat insulation layer 420 of the rotary kiln 400 is made of ceramic fiber, aluminum silicate fiber, light plate, multi-layer plate, refractory brick, refractory castable, heat insulation brick, or ceramic particle insulation board, and the materials of at least two layers of the heat insulation layer 420 are different. It can be understood that in other embodiments, the materials of at least two layers of the heat insulation layer 420 can be the same. In this embodiment, the heat insulation layer 420 includes three layers.

[0038] With reference to Figure 1 , the preheating mechanism 100 points to the direction of the cooler 500, the rotary kiln 400 includes a combustion zone 440, a sintering zone 450, and a cooling zone 460 arranged in sequence, the combustion zone 440 is used to heat the raw material surface uniformly, the sintering zone 450 is used to heat the raw material to a preset temperature, so that the raw material undergoes chemical reaction to form clinker, and the cooling zone 460 is used for heat exchange with the clinker, so that the clinker gradually cools down and finally becomes usable cement clinker. Specifically, the cooling zone 460 can prevent the growth of C3S crystal by quenching, which is beneficial to the improvement of clinker strength and grindability, and the quenching can make the liquid phase solidify into glass body, so that most of MgO and C3A are fixed in the glass body, which is beneficial to the stability and chemical corrosion resistance of the clinker.

[0039] With reference to Figure 1 , the rotary kiln 400 has a certain inclination angle; specifically, the inclined rotary kiln 400 can utilize gravity to help the material move along the cylinder to the discharge end, simplifying the material conveying system and reducing the additional power requirement; the inclined cylinder can also ensure that the material is in contact with the heat source for a more uniform time during movement, thereby ensuring uniform heating of the material and improving the firing quality; in addition, inclined installation can improve the dynamic characteristics of the equipment, making the equipment more stable during operation and reducing vibration and wear.

[0040] Further, the inclination angle is 3°-5°, by adjusting the inclination angle of the rotary kiln 400, the residence time of the material in the rotary kiln 400 can be controlled, which is crucial for controlling the chemical reaction in the firing process.

[0041] With reference to Figure 1The dry-process cement clinker calcining device further comprises an oxygen-enriched air providing member 600, the output pipes of the oxygen-enriched air providing member 600 are respectively communicated with the decomposing furnace 200 and the rotary kiln 400, and the oxygen-enriched air providing member 600 is used to provide oxygen-enriched air for the decomposing furnace 200 and the rotary kiln 400. Specifically, the oxygen-enriched air is used to produce cement clinker, and the appropriate oxygen-enriched air concentration is selected to ensure the stability of the combustion process and to achieve the required heat in the cement clinker production process. With the increase of the oxygen-enriched air concentration, the combustion time of the pulverized coal is shortened. For example, when the oxygen-enriched air concentration is increased to 25%, the combustion time of the pulverized coal can be shortened by about 16%. In the case of unchanged space size, the degree of combustion of the pulverized coal is naturally improved due to the shortening of the combustion time of the pulverized coal, which reduces the heat loss caused by the incomplete combustion of the pulverized coal and achieves the purpose of energy saving. In addition, the generation of harmful gases such as CO and NO x is also reduced, which is beneficial to environmental protection. The oxygen-enriched air providing member 600 is an oxygen-enriched air source. In the embodiment, the oxygen-enriched air providing member 600 is a box structure. It can be understood that in other embodiments, the oxygen-enriched air providing member 600 can be a tank or other various shapes.

[0042] Reference Figure 1 The oxygen-enriched air providing member 600 is communicated with the decomposing furnace 200 and the rotary kiln 400 through the output pipes 610, and the output pipes 610 are provided with adjusting valves 611 for adjusting the opening degree of the output pipes 610. Specifically, the required oxygen-enriched air concentration can be obtained by adjusting the adjusting valves 611.

[0043] Reference Figure 1 The rotary kiln 400 comprises a burner 470, and the dry-process cement clinker calcining device further comprises a fuel injector for injecting fuel into the burner 470, and the burner 470 is used to spray and ignite the fuel to form the heat energy of the calcined raw material in the rotary kiln 400. Specifically, the fuel injector sprays the fuel into the kiln body, and the combustion reaction occurs at high temperature to generate a large amount of heat energy, and the high-temperature gas generated by the combustion exchanges heat with the raw material to gradually heat the raw material.

[0044] Specifically, the fuel is coal, crude oil, natural gas, or biomass, etc., which is combusted in the rotary kiln 400 to generate heat, and the raw materials are heated by gas conduction or radiation; the burner 470 is a pulverized coal burner, a heavy oil burner, a natural gas burner, a coal gas burner, or a multi-fuel mixed burner, etc. In this embodiment, the fuel is pulverized coal, and the burner 470 is a pulverized coal burner. The pulverized coal burner adopts a plasma ignition technology, which is to directly ignite the pulverized coal with a high-power arc, and to obtain a stable power direct-current air plasma in a strong magnetic field under the condition that the medium gas pressure is greater than 0.01 MPa by contacting the cathode and the anode to generate an arc with a direct current (greater than 200 A). The continuous adjustable power range of the plasma ignition technology is 50-150 kW, and the center temperature can reach 6000°C. The pulverized coal enters the center area of the plasma torch and ignites rapidly within about 0.1 s, and finally forms a stable combustion torch; the pulverized coal burner has a specially designed multi-stage multi-nozzle air supply guide structure, which can make the pulverized coal produce high-temperature vortex in a short time, has the advantages of complete combustion, high combustion efficiency, high heat utilization rate, high efficiency and energy saving, smoke and dust removal, improved working conditions, and reduced labor intensity, etc., and is an ideal product of energy saving and environmental protection.

[0045] With reference to Figure 1 , the dry-process cement clinker calcining device further comprises a driving assembly 700, the driving assembly 700 is in driving connection with the rotary kiln 400, and the driving assembly 700 is used for driving the rotary kiln 400 to rotate. Specifically, the rotary motion of the rotary kiln 400 makes the materials tumble in the circumferential direction and move in the axial direction in the kiln. This movement not only helps the materials to be uniformly distributed in the kiln, but also promotes the mixing and reaction of the materials. In addition, the rotary motion makes the materials fully contact with the high-temperature gas for heat exchange, so as to complete the calcining process. The materials gradually heat up in different temperature zones in the kiln to complete physical and chemical changes.

[0046] With reference to Figure 1 , the driving assembly 700 comprises a driving member 710 and a gear 720 arranged on the driving member 710, the gear 720 is engaged with the rotary kiln 400, and the driving member 710 is used for driving the gear 720 to rotate to drive the rotary kiln 400 to rotate. In this embodiment, the driving member 710 is a driving motor, and it can be understood that in other embodiments, the driving member 710 can also be other driving structures for driving the gear 720 to rotate.

[0047] Further, the driving assembly 700 further comprises a speed reducer, which is used for providing the required low-speed high-torque output to ensure the stable operation of the equipment. In addition, the speed reducer also has the effect of reducing the load inertia, which helps to improve the stability and efficiency of the system.

[0048] Further, the dry-process cement clinker calcining device further comprises an auxiliary transmission device, the auxiliary transmission device is in transmission connection with the rotary kiln 400, and the auxiliary transmission device is used for driving the rotary kiln 400 to rotate. Specifically, the auxiliary transmission device is arranged so that the rotary kiln can still be operated when the main power supply is interrupted, the kiln cylinder is prevented from being bent and deformed, and the auxiliary transmission device is convenient to use during maintenance.

[0049] The above are only preferred embodiments of the present application, and do not limit the patent range of the present application, and any equivalent device transformation or direct / indirect application in other related technical fields under the utility model concept of the present application, using the content of the present application specification and drawings, is included in the patent protection range of the present application.

Claims

1. A dry-process cement clinker calcination apparatus, characterized in that, The dry-process cement clinker calcining device comprises: a preheating mechanism for preheating raw materials; a decomposing furnace connected with the preheating mechanism, the decomposing furnace being located below the preheating mechanism, the decomposing furnace being used for receiving and decomposing the preheated raw materials; a material spraying assembly connected with the decomposing furnace; a rotary kiln connected with the decomposing furnace at an end away from the decomposing furnace, the rotary kiln being located below the decomposing furnace, the rotary kiln being used for calcining the raw materials to form clinkers, the rotary kiln comprising, from outside to inside, an outer shell, at least two layers of heat insulation layers and a heat-resistant inner lining; a cooler for cooling the clinkers. The material spraying assembly is used for uniformly spraying the preheated raw materials into the rotary kiln. The material spraying assembly comprises a material spraying pipeline and raw material sprayers arranged on the material spraying pipeline, the raw material spraying pipeline being connected with the decomposing furnace and the rotary kiln.

2. The dry cement clinker calcining device as claimed in claim 1, wherein, The preheating mechanism comprises, from top to bottom, a spouting bed preheater and a cyclone vertical cylinder preheater, the spouting bed preheater being provided with multiple layers of spouting plates, the spouting plates being provided with multiple spouting holes, the spouting bed preheater being used for preheating and dispersing the raw materials, the cyclone vertical cylinder preheater being used for secondary preheating of the raw materials.

3. The dry cement clinker calcining device as claimed in claim 1, wherein, The outer shell is made of steel plate material; the heat-resistant inner lining is made of clay bricks, magnesium-aluminum spinel bricks, phosphate bricks or refractory castable material.

4. The dry cement clinker calcining device as claimed in claim 1, wherein The heat insulation layers are made of ceramic fiber, aluminum silicate fiber, light plate, multi-layer plate, refractory brick, refractory castable material, heat insulation brick or ceramsite insulation board, at least two layers of the heat insulation layers being made of different materials.

5. The dry cement clinker calcining device as claimed in claim 1, wherein, The dry-process cement clinker calcining device further comprises an oxygen-enriched air providing member, output pipes of the oxygen-enriched air providing member being respectively connected with the decomposing furnace and the rotary kiln, the oxygen-enriched air providing member being used for providing oxygen-enriched air for the decomposing furnace and the rotary kiln.

6. The dry cement clinker calcining device as claimed in claim 1, wherein, An adjusting valve is arranged on the output pipe and used for adjusting the opening degree of the output pipe.

7. The dry cement clinker calcining device according to claim 6, wherein The rotary kiln comprises a burner, the dry-process cement clinker calcining device further comprises a fuel sprayer used for spraying fuel into the burner, the burner being used for spraying and igniting the fuel to form heat energy for calcining the raw materials in the rotary kiln.

8. The dry cement clinker calcining device as claimed in claim 1, wherein, The dry-process cement clinker calcining device further comprises a driving assembly in transmission connection with the rotary kiln, the driving assembly being used for driving the rotary kiln to rotate.

9. The dry cement clinker calcining device as claimed in claim 1, wherein, The driving assembly comprises a driving member and a gear arranged on the driving member, the gear being engaged with the rotary kiln, the driving member being used for driving the gear to rotate so as to drive the rotary kiln to rotate.

10. The dry cement clinker calcining device according to claim 9, wherein, ​

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