CN112050652B - Cyclone preheater for cement predecomposition kiln - Google Patents
Cyclone preheater for cement predecomposition kiln Download PDFInfo
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- CN112050652B CN112050652B CN202010974087.8A CN202010974087A CN112050652B CN 112050652 B CN112050652 B CN 112050652B CN 202010974087 A CN202010974087 A CN 202010974087A CN 112050652 B CN112050652 B CN 112050652B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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Abstract
The invention discloses a cyclone preheater for a cement predecomposition kiln, which comprises a cyclone cylinder, an ascending pipeline tangentially connected to the upper part of the cyclone cylinder, an airflow outlet arranged at the upper end of the cyclone cylinder, a feed opening arranged at the lower end of the cyclone cylinder, a feed pipe connected to the ascending pipeline and a material guide impeller, wherein the material guide impeller comprises an impeller shaft and a plurality of scraping blades annularly arranged outside the impeller shaft, the port of the feed pipe connected to the ascending pipeline is arranged to be a flat port, the impeller shaft transversely extends and is rotatably arranged in the flat port, and the outline of each scraping blade is respectively tangent to the upper side wall and the lower side wall of the flat port. The invention solves the problems of poor dispersion of the preheated raw meal powder entering the ascending pipeline and poor heat exchange effect caused by discontinuous and uneven blanking of the preheated raw meal powder.
Description
Technical Field
The invention relates to the technical field of cement production, in particular to a cyclone preheater for a cement predecomposition kiln.
Background
In the cement production process, raw materials need to enter a preheater system before entering a kiln, and the purpose is to exchange heat with hot flue gas from a rotary kiln and a decomposing furnace, absorb a large amount of heat energy contained in the flue gas and improve the kiln entering decomposition rate of the raw materials.
The preheater system comprises a multi-stage cyclone preheater, wherein the cyclone preheater fully utilizes hot gas discharged by the rotary kiln and the decomposing furnace, and realizes preheating and partial decomposition functions through heat exchange between gas and solid and the separation effect of a cyclone cylinder. Raw meal powder is fed from the second-stage cyclone ascending pipeline, carries out airflow heat exchange with hot gas from the second stage, enters the first-stage cyclone together, is preheated after separation, falls into the third-stage cyclone ascending pipeline, and completes the heat exchange (mainly in the pipeline) and separation (in the cyclone) processes in sequence. After heat exchange, the preheated raw meal powder is fed into the kiln, and hot gas is discharged from an air outlet pipe of the primary cyclone cylinder.
In the prior art, the preheated raw meal powder separated from the upper-level cyclone enters the next-level ascending pipeline from the discharging chute, the discharging completely depends on gravity, the discharging is discontinuous and uneven, the preheated raw meal powder entering the ascending pipeline is poor in dispersion, and the heat exchange effect is poor.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a cyclone preheater for a cement predecomposition kiln, which aims to solve the problems of poor dispersion of preheated raw material powder entering a rising pipeline and poor heat exchange effect caused by discontinuous and uneven blanking of the preheated raw material powder.
The invention provides a cyclone preheater for a cement predecomposition kiln, which comprises a cyclone, a rising pipeline tangentially connected to the upper part of the cyclone, an airflow outlet arranged at the upper end of the cyclone, a feed opening arranged at the lower end of the cyclone and a feed pipe connected to the rising pipeline, wherein the airflow outlet is arranged at the upper end of the cyclone; the material feeding device is characterized by further comprising a material feeding impeller, the material feeding impeller comprises an impeller shaft and a plurality of scraping blades annularly arranged outside the impeller shaft, a port of the discharging pipe, which is connected to the ascending pipeline, is arranged to be a flat port, the impeller shaft transversely extends and is rotatably arranged in the flat port, and the outer contours of the scraping blades are tangent to the upper side wall and the lower side wall of the flat port respectively.
Furthermore, the ascending pipeline is provided with a bulk material section, and the bulk material section comprises a direct connection middle cylinder, an expanding outer cylinder and a reducing inner cylinder, wherein the direct connection middle cylinder is in direct connection with the ascending pipeline on the upper side and the lower side, the expanding outer cylinder is arranged outside the direct connection middle cylinder, and the reducing inner cylinder is arranged in the direct connection middle cylinder; an annular cavity is formed between the diameter-expanding outer cylinder and the consequent connection middle cylinder, an annular air duct is formed between the consequent connection middle cylinder and the diameter-reducing inner cylinder, an air inlet is formed between the lower end of the diameter-reducing inner cylinder and the consequent connection middle cylinder, and an air outlet is formed between the upper end of the diameter-reducing inner cylinder and the consequent connection middle cylinder; an annular wind wheel is arranged in the annular air duct, the annular wind wheel comprises an inner ring rotationally sleeved outside the reducing inner cylinder, an outer ring rotationally arranged in the direct connection middle cylinder and a plurality of blades connected between the inner ring and the outer ring, and an outer gear ring penetrating out of the direct connection middle cylinder is arranged on the periphery of the outer ring; the flat mouth passes annular cavity and annular wind channel are in order to insert the undergauge inner tube in, the impeller shaft is worn out the flat mouth and is stretched into in the annular cavity to coaxial arrangement has first bevel gear, the transmission shaft is installed to the annular cavity internal rotation, coaxial arrangement on the transmission shaft with outer ring gear meshing's first gear and with first bevel gear meshing's second bevel gear.
Furthermore, a material scattering plate positioned on the lower side of the flat opening is arranged in the reducing inner cylinder.
Furthermore, the reducing inner cylinder is provided with a first protruding portion protruding inwards, a first concave portion is formed on the outer side of the first protruding portion, and the inner ring is rotatably arranged in the first concave portion.
Furthermore, the forward connecting middle cylinder is provided with a second protruding part protruding outwards, a second concave part is formed on the inner side of the second protruding part, the outer ring is rotatably arranged in the second concave part, and the second protruding part is provided with an annular opening for the outer gear ring to penetrate out.
Furthermore, the air passing area of the air outlet is adjustable.
Furthermore, the air outlet is provided with a fixed annular plate fixed between the expanding outer cylinder and the direct connection middle cylinder and a rotating annular plate attached to the upper side of the fixed annular plate, and the fixed annular plate and the rotating annular plate are respectively provided with air passing holes which can be staggered or overlapped.
Furthermore, the forward-connection middle cylinder is provided with a third protruding part protruding outwards, a third recessed part is formed on the inner side of the third protruding part, the rotating annular plate is sleeved outside the reducing inner cylinder, the outer edge of the rotating annular plate is arranged in the third recessed part, the third protruding part is circumferentially provided with a section of arc-shaped opening, and the rotating annular plate is connected with a shifting piece penetrating out of the arc-shaped opening; the driving mechanism is connected with the shifting piece and used for driving the rotating annular plate to rotate.
Furthermore, the outer end of the poking sheet is arc-shaped and is provided with gear teeth; the driving mechanism comprises a servo motor arranged in the annular cavity and a second gear coaxially arranged on an output shaft of the servo motor, and the second gear is meshed with gear teeth at the outer end of the shifting piece.
The invention has the beneficial effects that:
by adopting the cyclone preheater, the preheated raw meal powder material enters the ascending pipeline through the discharging pipe, under the impact of high-speed ascending airflow, the material is dispersed and enters the cyclone cylinder along with the upward flow of the airflow, the preheated raw meal powder separated from the cyclone cylinder enters the discharging pipe of the cyclone preheater from the discharging opening, and the gas separated from the cyclone cylinder enters the ascending pipeline of the previous-stage cyclone preheater from the airflow outlet.
Establish to flat mouthful through the port of going into the tedge with the unloading pipe, and at flat mouthful department installation guide impeller, guide impeller clockwise turning, and spill the tedge with the material from flat mouthful of last lateral wall, it can prevent effectively that the stifled pipe of unloading pipe and air current from getting into the unloading pipe, ensured that the material can spill the tedge continuously, evenly, improved the homogeneity of feed, the dispersibility that the material got into the tedge is better, it is just also better with the heat transfer effect of hot gas flow.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic overall external structure of an embodiment of the present invention;
FIG. 2 is a schematic view of a feed configuration according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
fig. 4 is a sectional view B-B of fig. 2.
In the drawing, 10-cyclone; 20-a riser pipe; 21-a bulk section; 22-straight-forward connection middle cylinder; 221-a second projection; 222-a second recess; 223-an annular opening; 224-a third projection; 225-third recess; 226-arc opening; 23-expanding the outer cylinder; 24-reducing the inner cylinder; 241-a first projection; 242 — a first recess; 25-an annular cavity; 26-an annular air duct; 27-an air inlet; 28-air outlet; 30-a gas stream outlet; 40-a feed opening; 50-a blanking pipe; 51-flat mouth; 60-a material guide impeller; 61-impeller shaft; 62-a doctor blade; 70-annular wind wheel; 71-inner ring; 72-an outer ring; 73-blade; 81-outer gear ring; 82-a first bevel gear; 83-a drive shaft; 84-a first gear; 85-a second bevel gear; 90-material spreading plate; 101-stationary annular plate; 102-rotating annular plate; 103-air passing holes; 104-a plectrum; 105-a servo motor; 106-second gear.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
As shown in fig. 1 to 4, an embodiment of the present invention provides a cyclone preheater for a cement predecomposition kiln, which includes a cyclone 10, a rising conduit 20 tangentially connected to an upper portion of the cyclone 10, an airflow outlet 30 disposed at an upper end of the cyclone 10, a discharge opening 40 disposed at a lower end of the cyclone 10, a discharge pipe 50 connected to the rising conduit 20, and a guide vane 60.
The material guiding impeller 60 comprises an impeller shaft 61 and a plurality of blades 62 annularly arranged outside the impeller shaft 61, the port of the discharging pipe 50 connected to the ascending pipe 20 is set as a flat port 51, the impeller shaft 61 extends along the transverse direction and is rotatably arranged in the flat port 51, and the outer contour of each blade 62 is tangent to the upper side wall and the lower side wall of the flat port 51 respectively.
By adopting the cyclone preheater, the preheated raw meal powder material enters the ascending pipeline 20 through the blanking pipe 50, under the impact of high-speed ascending airflow, the material is dispersed and enters the cyclone cylinder 10 along with the upward flow of the airflow, the preheated raw meal powder separated from the cyclone cylinder 10 enters the blanking pipe 50 of the cyclone preheater from the blanking port 40, and the gas separated from the cyclone cylinder 10 enters the ascending pipeline 20 of the previous-stage cyclone preheater from the airflow outlet 30.
The port of the discharging pipe 50 connected into the ascending pipeline 20 is set to be the flat port 51, the material guide impeller 60 is installed at the flat port 51, the material guide impeller 60 rotates clockwise, the material is scattered into the ascending pipeline 20 from the upper side wall of the flat port 51, the discharging pipe 50 can be effectively prevented from being blocked and air flow can be effectively prevented from entering the discharging pipe 50, the material can be continuously and uniformly scattered into the ascending pipeline 20, the feeding uniformity is improved, the dispersibility of the material entering the ascending pipeline 20 is better, and the heat exchange effect of the material and hot air flow is better.
In one embodiment, referring to fig. 2, 3 and 4, the ascending conduit 20 has a bulk material section 21, and the bulk material section 21 includes a direct connection intermediate cylinder 22 directly connected to the ascending conduit 20 on the upper and lower sides, an outer expanding cylinder 23 disposed outside the direct connection intermediate cylinder 22, and an inner reducing cylinder 24 disposed inside the direct connection intermediate cylinder 22. An annular cavity 25 is formed between the expanding outer cylinder 23 and the direct-connected middle cylinder 22, an annular air duct 26 is formed between the direct-connected middle cylinder 22 and the reducing inner cylinder 24, an air inlet 27 is formed between the lower end of the reducing inner cylinder 24 and the direct-connected middle cylinder 22, and an air outlet 28 is formed between the upper end of the reducing inner cylinder 24 and the direct-connected middle cylinder 22. An annular wind wheel 70 is arranged in the annular wind channel 26, the annular wind wheel 70 comprises an inner ring 71 which is rotatably sleeved outside the reducing inner cylinder 24, an outer ring 72 which is rotatably arranged in the direct connection middle cylinder 22 and a plurality of blades 73 which are connected between the inner ring 71 and the outer ring 72, and an outer gear ring 81 which penetrates out of the direct connection middle cylinder 22 is arranged on the periphery of the outer ring 72. The flat port 51 penetrates through the annular cavity 25 and the annular air duct 26 to be connected into the reducing inner cylinder 24, the impeller shaft 61 penetrates through the flat port 51 to extend into the annular cavity 25 and is coaxially provided with a first bevel gear 82, the annular cavity 25 is rotatably provided with a transmission shaft 83, and the transmission shaft 83 is coaxially provided with a first gear 84 meshed with the outer gear ring 81 and a second bevel gear 85 meshed with the first bevel gear 82.
One part of the ascending air flow enters the reducing inner cylinder 24, the other part of the ascending air flow enters the annular air duct 26, the air flow entering the reducing inner cylinder 24 impacts and scatters materials and carries the materials to ascend, the air flow entering the annular air duct 26 drives the annular wind wheel 70 to rotate, the outer gear ring 81 rotates along with the annular wind wheel 70, the outer gear ring 81 drives the first gear 84 to rotate, the transmission shaft 83 rotates along with the first gear 84, the second bevel gear 85 rotates along with the transmission shaft 83, the second bevel gear 85 drives the first bevel gear 82 to rotate, the material guide impeller 60 is further driven to rotate, and discharging of the discharging pipe 50 is achieved.
Preferably, in order to improve the material dispersing effect, a material scattering plate 90 is arranged in the reducing inner cylinder 24 and is positioned at the lower side of the flat port 51, the material scattering plate 90 scattered by the material guiding impeller 60 is further dispersed and folded, and then is further dispersed and suspended by gas.
Preferably, the reducing inner cylinder 24 is provided with a first protruding portion 241 protruding inwards, a first recessed portion 242 is formed on the outer side of the first protruding portion 241, the inner ring 71 is rotatably arranged in the first recessed portion 242, and the first protruding portion 241 is arranged in the reducing inner cylinder 24, so that the air passing area of the reducing inner cylinder 24 can be reduced, the airflow at the position is accelerated, the impact dispersion suspension capability of the airflow on the material is improved, and meanwhile, the first recessed portion 242 is formed on the outer side of the reducing inner cylinder 24, so that the inner ring 71 of the annular wind wheel 70 can be conveniently installed in a limited mode.
Preferably, the direct connection middle cylinder 22 is provided with a second protruding portion 221 protruding outwards, a second recessed portion 222 is formed inside the second protruding portion 221, the outer ring 72 is rotatably arranged in the second recessed portion 222, the second protruding portion 221 is provided with an annular opening 223 through which the outer gear ring 81 penetrates, and the second protruding portion 221 is arranged on the direct connection middle cylinder 22 and the second recessed portion 222 is formed inside the direct connection middle cylinder, so that the outer ring 72 of the annular wind wheel 70 can be conveniently installed in a limited manner.
In one embodiment, the air passing area of the air outlet 28 is adjustable, and the air volume ratio between the inner diameter-reducing cylinder 24 and the annular air duct 26 can be adjusted by adjusting the air passing area of the air outlet 28, so that the rotation speed of the material guide impeller 60 and the flow rate of the air flow in the inner diameter-reducing cylinder 24 are controlled, the material scattering speed and the air flow rate of the scattered materials are balanced, and the optimal ratio is realized.
Specifically, the air outlet 28 is provided with a fixed annular plate 101 fixed between the expanded diameter outer cylinder 23 and the transition cylinder 22, and a rotating annular plate 102 attached to the upper side of the fixed annular plate 101, the fixed annular plate 101 and the rotating annular plate 102 are provided with air passing holes 103 which can be shifted or overlapped, respectively, and the degree of overlap of the air passing holes 103 in the fixed annular plate 101 and the rotating annular plate 102 is adjusted by driving the rotating annular plate 102 to rotate, so that the air passing area of the air outlet 28 can be adjusted.
Preferably, the direct connecting middle cylinder 22 is provided with a third protrusion 224 protruding outwards, a third recess 225 is formed on the inner side of the third protrusion 224, the rotating annular plate 102 is sleeved outside the reducing inner cylinder 24, the outer edge of the rotating annular plate 102 is placed in the third recess 225, and the third protrusion 224 is arranged on the direct connecting middle cylinder 22 and the third recess 225 is arranged on the inner side of the direct connecting middle cylinder, so that the rotating annular plate 102 is convenient to be installed in a limited mode.
The embodiment further comprises a driving mechanism, the third protruding portion 224 is provided with a section of arc-shaped opening 226 along the circumferential direction, the rotating annular plate 102 is connected with the pulling piece 104 penetrating through the arc-shaped opening 226, and the driving mechanism is connected with the pulling piece 104 for driving the rotating annular plate 102 to rotate. Specifically, the outer end of the pulling piece 104 is arc-shaped and provided with gear teeth, the driving mechanism comprises a servo motor 105 installed in the annular cavity 25, and a second gear 106 coaxially installed on an output shaft of the servo motor 105, and the second gear 106 is meshed with the gear teeth at the outer end of the pulling piece 104. When the air passing area of the air outlet 28 is adjusted, the servo motor 105 drives the shifting piece 104 to rotate through the second gear 106, so as to drive the rotating annular plate 102 to rotate.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (8)
1. A cyclone preheater for a cement predecomposition kiln comprises a cyclone, a rising pipeline tangentially connected to the upper part of the cyclone, an airflow outlet arranged at the upper end of the cyclone, a feed opening arranged at the lower end of the cyclone and a feed pipe connected to the rising pipeline, and is characterized in that: the material guide impeller comprises an impeller shaft and a plurality of scraping blades annularly arranged outside the impeller shaft, a port of the discharging pipe, which is connected to the ascending pipeline, is designed to be a flat opening, the impeller shaft extends along the transverse direction and is rotatably arranged in the flat opening, and the outer contour of each scraping blade is tangent to the upper side wall and the lower side wall of the flat opening respectively;
the ascending pipeline is provided with a bulk material section, and the bulk material section comprises a direct connection middle cylinder which is in direct connection with the ascending pipeline on the upper side and the lower side, an expanding outer cylinder which is arranged outside the direct connection middle cylinder and a reducing inner cylinder which is arranged in the direct connection middle cylinder;
an annular cavity is formed between the diameter-expanding outer cylinder and the consequent connection middle cylinder, an annular air duct is formed between the consequent connection middle cylinder and the diameter-reducing inner cylinder, an air inlet is formed between the lower end of the diameter-reducing inner cylinder and the consequent connection middle cylinder, and an air outlet is formed between the upper end of the diameter-reducing inner cylinder and the consequent connection middle cylinder;
an annular wind wheel is arranged in the annular air duct, the annular wind wheel comprises an inner ring rotationally sleeved outside the reducing inner cylinder, an outer ring rotationally arranged in the direct connection middle cylinder and a plurality of blades connected between the inner ring and the outer ring, and an outer gear ring penetrating out of the direct connection middle cylinder is arranged on the periphery of the outer ring;
the flat mouth passes annular cavity and annular wind channel are in order to insert the undergauge inner tube in, the impeller shaft is worn out the flat mouth and is stretched into in the annular cavity to coaxial arrangement has first bevel gear, the transmission shaft is installed to the annular cavity internal rotation, coaxial arrangement on the transmission shaft with outer ring gear meshing's first gear and with first bevel gear meshing's second bevel gear.
2. The cyclone preheater for a cement predecomposition kiln as set forth in claim 1, wherein: and a material scattering plate positioned on the lower side of the flat opening is arranged in the reducing inner cylinder.
3. The cyclone preheater for a cement predecomposition kiln as set forth in claim 1, wherein: the reducing inner cylinder is provided with a first protruding portion protruding inwards, a first concave portion is formed on the outer side of the first protruding portion, and the inner ring is rotatably arranged in the first concave portion.
4. The cyclone preheater for a cement predecomposition kiln as set forth in claim 1, wherein: the forward-connected middle cylinder is provided with a second protruding portion protruding outwards, a second recessed portion is formed on the inner side of the second protruding portion, the outer ring is rotatably arranged in the second recessed portion, and an annular opening for the outer gear ring to penetrate through is formed in the second protruding portion.
5. The cyclone preheater for a cement predecomposition kiln as set forth in claim 1, wherein: the air passing area of the air outlet is adjustable.
6. The cyclone preheater for a cement predecomposition kiln as set forth in claim 5, wherein: the air outlet is provided with a fixed annular plate fixed between the expanding outer cylinder and the forward connecting middle cylinder and a rotating annular plate attached to the upper side of the fixed annular plate, and the fixed annular plate and the rotating annular plate are respectively provided with air passing holes which can be staggered or overlapped.
7. The cyclone preheater for a cement predecomposition kiln as set forth in claim 6, wherein: the direct-connection middle cylinder is provided with a third protruding part protruding outwards, a third sunken part is formed on the inner side of the third protruding part, the rotary annular plate is sleeved outside the reducing inner cylinder, the outer edge of the rotary annular plate is arranged in the third sunken part, the third protruding part is circumferentially provided with a section of arc-shaped opening, and the rotary annular plate is connected with a shifting piece penetrating out of the arc-shaped opening;
the driving mechanism is connected with the shifting piece and used for driving the rotating annular plate to rotate.
8. The cyclone preheater for a cement predecomposition kiln as set forth in claim 7, wherein: the outer end of the poking sheet is arc-shaped and is provided with gear teeth;
the driving mechanism comprises a servo motor arranged in the annular cavity and a second gear coaxially arranged on an output shaft of the servo motor, and the second gear is meshed with gear teeth at the outer end of the shifting piece.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010974087.8A CN112050652B (en) | 2020-09-16 | 2020-09-16 | Cyclone preheater for cement predecomposition kiln |
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| CN202010974087.8A CN112050652B (en) | 2020-09-16 | 2020-09-16 | Cyclone preheater for cement predecomposition kiln |
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| CN112050652B true CN112050652B (en) | 2022-04-22 |
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| CN111441595A (en) * | 2020-04-22 | 2020-07-24 | 五冶集团上海有限公司 | Method for installing oversized cyclone |
| CN113357929B (en) * | 2021-06-18 | 2022-04-01 | 武汉科技大学 | Cement decomposition kiln coupled with grate and process for cooperatively disposing household garbage |
| CN115716014A (en) * | 2022-11-16 | 2023-02-28 | 宁夏嘉华固井材料有限公司 | Production and preparation equipment and method for well cementing material of thickened oil thermal production well |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2281333A1 (en) * | 1974-08-05 | 1976-03-05 | Fives Cail Babcock | IMPROVEMENTS AT THE FACILITIES FOR THE MANUFACTURING OF CEMENT BY THE DRY METHOD |
| CN2208215Y (en) * | 1994-12-21 | 1995-09-20 | 庞廷祥 | Storage device of vortex preheater in rotary kiln |
| CN208814895U (en) * | 2018-09-04 | 2019-05-03 | 常山江山虎水泥有限公司 | A kind of preheater |
| CN109608071A (en) * | 2019-02-15 | 2019-04-12 | 中材海外工程有限公司 | A kind of multistage pre-heating system of cement predecomposition kiln |
| CN111664712A (en) * | 2020-06-19 | 2020-09-15 | 王志宏 | Power material lifting device for cement kiln and cement kiln adopting power material lifting device |
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Effective date of registration: 20220507 Address after: 100000 room 1201, Ganjiakou building, No. 17, Sanlihe Road, Haidian District, Beijing Patentee after: Sinoma overseas technology development Co.,Ltd. Address before: 100037 floor 12, No.17, Sanlihe Road, Haidian District, Beijing Patentee before: SINOMA OVERSEAS DEVELOPMENT CO.,LTD. |
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