CN112473995B - Improved raw material roller press final grinding system and process flow thereof - Google Patents
Improved raw material roller press final grinding system and process flow thereof Download PDFInfo
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- CN112473995B CN112473995B CN202011380569.7A CN202011380569A CN112473995B CN 112473995 B CN112473995 B CN 112473995B CN 202011380569 A CN202011380569 A CN 202011380569A CN 112473995 B CN112473995 B CN 112473995B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/32—Passing gas through crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
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Abstract
The invention relates to an improved raw material roller press finish grinding system and a process flow thereof, wherein the improved raw material roller press finish grinding system comprises a feeding belt conveyor, a V-shaped selector, a second bucket elevator, a steady flow bin, a manual valve, an automatic quick stop valve, a roller press and a first bucket elevator which are sequentially connected along a material path; the cyclone separator is connected between the air outlet of the V-shaped separator and the air inlet of the cyclone cylinder in series, a coarse powder outlet and a sedimentation material outlet are arranged on the side face of the fine powder separator, and the coarse powder outlet is connected with the feed inlet of the steady flow bin; the top of the fine powder selecting machine is also provided with a material feeding opening which is connected with a sedimentation material outlet; according to the invention, the settled fine powder in the fine powder separator enters the fine powder separator again through the settled material discharge port and the coarse powder outlet and is matched with the material scattering table to finish secondary powder separation, so that the powder concentration in the air flow is reduced to enhance the carrying capacity of the air flow, meanwhile, the fine powder is prevented from entering the roller press for circulating extrusion, the fine powder content of the roller press material is further reduced to improve the extrusion acting effect of the roller press, the system stability is improved, and the system yield and the powder discharging quality are ensured.
Description
Technical Field
The invention relates to an improved raw material roller press finish grinding system and a process flow thereof.
Background
Along with the development of the grinding technology of a material bed, the raw material preparation system in the cement industry mainly uses the grinding technology of the material bed at present, the grinding technology of the material bed is mainly divided into a raw material vertical mill system and a raw material roller press final grinding system, the raw material vertical mill system mainly adopts an internal circulation vertical mill with a powder selecting machine, and the resistance of a nozzle ring of the vertical mill is larger, so that the air flow resistance of the system is larger, and the power consumption of the raw material internal circulation vertical mill final grinding system is higher; the powder selecting system of the roller press final grinding system adopts an external circulation powder selecting system, so that the powder selecting airflow resistance is low, the grinding power consumption of the system is further reduced, and the roller press final grinding system is a more common raw material grinding system at present.
The roller press finish grinding system generally adopts a structural mode of a roller press, a V-shaped powder concentrator and a fine powder concentrator, wherein the fine powder concentrator is divided into a horizontal type powder concentrator and a vertical type powder concentrator, the fineness of raw materials cannot be controlled by the horizontal type powder concentrator, and the calcination of a cement kiln system is affected, so that the vertical type fine powder concentrator is mostly adopted.
However, the lower part of a rotor cage of the existing vertical fine powder concentrator is conical, the size of an air inlet and a feed inlet is small, the size of the position where the rotor cage is positioned is large, powder concentration air flow upwards enters the rotor cage along a discharging cone, the wind speed is gradually reduced in the process that the fine powder selected by V is brought into the vertical fine powder concentrator by the powder concentration air flow, and along with the reduction of the wind speed, a sedimentation phenomenon is generated on part of the fine powder, and even some fine powder meeting the granularity requirement of raw materials also can be settled; in addition, when the roller press works and fluctuates, the powder amount of V-shaped powder brought into the fine powder selecting machine also fluctuates, so that the concentration of the powder in air flow is further higher, the carrying capacity of the air flow is weakened, and therefore, part of powder is also caused to subside; the settled fine powder is returned to the steady flow bin along with coarse materials to be circularly extruded with the roller press, and the extrusion acting effect of the roller press is further influenced due to the high content of the fine powder of the roller press materials, even the roller press is caused to vibrate, so that the stability of the system is poor, the yield and the powder discharging quality of the system are further influenced, and the improvement is needed.
Disclosure of Invention
Aiming at the current state of the art, the invention aims to provide an improved raw material roller press final grinding system and a process flow thereof, wherein the powder concentration in the air flow is reduced to enhance the carrying capacity of the air flow, and the fine powder content of the material is reduced to improve the extrusion acting effect of the roller press, so that the system stability is improved, and the system yield and the powder discharging quality are ensured.
The technical scheme adopted for solving the technical problems is as follows: an improved raw material roller press finish grinding system comprises a feeding belt conveyor, a V-shaped separator, a second bucket elevator, a steady flow bin, a manual valve, an automatic quick stop valve, a roller press and a first bucket elevator which are sequentially connected along a material path, wherein a discharge port of the first bucket elevator is connected with a feed port of the V-shaped separator; still include cyclone and chute that link to each other in proper order along the powder way, still include circulating fan and chute fan, circulating fan's air intake links to each other with the air outlet of cyclone, and chute fan's air outlet links to each other with the air intake of chute, its characterized in that: the cyclone separator is characterized by further comprising a fine powder separator which is connected in series between an air outlet of the V-shaped separator and an air inlet of the cyclone cylinder, wherein a coarse powder outlet and a sedimentation material outlet are arranged on the side face of the fine powder separator, and the coarse powder outlet is connected with a feeding hole of the steady flow bin; the top of the fine powder separator is also provided with an upper material scattering port which is connected with a sedimentation material discharging port; the coarse powder outlet is also provided with a first air locking blanking valve, and the sedimentation material outlet is also provided with a second air locking blanking valve.
Preferably, a third bucket elevator is further arranged between the upper material scattering port and the sedimentation material discharging port, the third bucket elevator is arranged on the downstream side of the second air locking blanking valve, a material scattering table is further arranged at the top of the fine powder selecting machine, and the material scattering table is matched with the upper material scattering port.
The technological process of an improved raw material roller press finish grinding system is characterized in that: the method comprises the following steps:
(1) The raw materials are proportioned by a metering scale, and if the proportioned fresh raw materials have larger water content, the raw materials are firstly sent into a V selection through a feeding belt conveyor; meanwhile, high Wen Yaowei flue gas from the cement kiln system enters the V-selection through the V-selection air inlet, and raw materials and high-temperature hot air are mixed in the V-selection to realize drying and primary separation of the raw materials.
(2) The coarse powder after V selection and sorting is sent into a steady flow bin through a second bucket elevator, a manual valve and an automatic quick stop valve are opened, the coarse powder enters a roller press to finish material extrusion, then is sent into V selection through a first bucket elevator, and enters V selection again together with fresh raw materials from a batching station for classification and drying.
(3) The fine powder selected by V rises along with the air flow and is brought into a fine powder selecting machine, the fine powder meeting the raw material granularity requirement passes through a rotor cage to be selected as a raw material finished product and enters a cyclone barrel to complete gas-solid separation under the action of a circulating fan, the separated fine powder is sent into a raw material homogenizing warehouse under the action of a chute and a chute fan, and the air flow after gas-solid separation is circulated back to V through the circulating fan or is sent into an exhaust gas treatment system; the coarse powder which is not selected as the finished product is returned to the roller press for circulating extrusion through a coarse powder outlet.
(4) And the fine powder carried into the fine powder selecting machine along with the powder selecting air flow is gradually reduced due to the wind speed in the rising process, so that part of the fine powder is settled and discharged from a settled material discharging port, and then the secondary powder selecting is completed by virtue of a feeding hole and a feeding table under the action of a third bucket elevator and returned to the fine powder selecting machine.
(5) When the water content of the fresh raw materials after the proportioning is smaller, the fresh raw materials can be completely sent into a steady flow bin and then enter a roller press for extrusion grinding.
(6) If the fine powder selecting efficiency of the fine powder selecting machine is not high, the missed fine powder enters a steady flow bin and a roller press, and the stability of a material bed of the roller press is affected by more fine powder, even the roller press is caused to vibrate; at this time, the coarse powder outlet of the fine powder separator is connected with the feeding inlet of the V-type separator, and the fine powder leaked and selected by the fine powder separator is brought into the fine powder separator again through the airflow of the V-type separator so as to realize secondary powder separation of the fine powder, reduce the content of the fine powder of the raw materials entering the roller press and realize stable and efficient work doing of the roller press.
Compared with the prior art, the invention has the advantages that: according to the invention, the top of the fine powder separator is provided with the upper material scattering port, the side surface of the fine powder separator is provided with the coarse powder outlet and the sedimentation material outlet, and the settled fine powder in the fine powder separator can enter the fine powder separator again through the sedimentation material outlet and the coarse powder outlet and is matched with the material scattering table to finish secondary powder separation, so that the powder concentration in air flow is reduced to enhance the air flow carrying capacity, meanwhile, the fine powder is prevented from entering the roller press to be circularly extruded, the fine powder content of the roller press material is further reduced to improve the extrusion acting effect of the roller press, and the system stability is improved, and the system yield and the powder discharging quality are ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a position diagram of a first airlock blanking valve of the present invention;
FIG. 3 is a position diagram of a second airlock blanking valve of the present invention;
FIG. 4 is a position of a third bucket elevator and spreader station of the present invention;
FIG. 5 is a plot of the trend of a fresh feedstock with less moisture according to the present invention;
Fig. 6 is a schematic diagram of the invention where the coarse powder outlet is connected to the V-option feed inlet.
Detailed Description
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
In order to keep the following description of the embodiments of the present invention clear and concise, the detailed description of known functions and known components thereof have been omitted.
As shown in fig. 1, the improved raw material roller press finish grinding system comprises a feeding belt conveyor 11, a V-shaped separator 6, a second bucket elevator 7, a steady flow bin 1, a manual valve 2, an automatic quick stop valve 3, a roller press 4 and a first bucket elevator 5 which are sequentially connected along a material path, wherein a discharge port of the first bucket elevator 5 is connected with a feed port of the V-shaped separator 6; the cyclone separator further comprises a cyclone cylinder 9 and a chute 12 which are sequentially connected along a powder path, and further comprises a circulating fan 10 and a chute fan 13, wherein an air inlet of the circulating fan 10 is connected with an air outlet of the cyclone cylinder 9, an air outlet of the chute fan 13 is connected with an air inlet of the chute 12, the cyclone separator further comprises a fine powder separator 8, the fine powder separator 8 is connected between the air outlet of the V-shaped separator 6 and the air inlet of the cyclone cylinder 9 in series, a coarse powder outlet 81 and a sedimentation material outlet 82 are arranged on the side face of the fine powder separator 8, and the coarse powder outlet 81 is connected with a feed inlet of the steady flow bin 1; the top of the fine powder concentrator 8 is also provided with an upper material scattering port 83, and the upper material scattering port 83 is connected with a sedimentation material discharging port 82.
As shown in fig. 2, the coarse powder outlet 81 is further provided with a first air locking blanking valve 14, and the first air locking blanking valve 14 can prevent air in the steady flow bin 1 from entering the fine powder separator 8 in the process that coarse powder enters the steady flow bin 1, so that a blanking air locking effect is achieved.
As shown in fig. 3, the second air-locking blanking valve 15 is further arranged on the settled material outlet 82, and the second air-locking blanking valve 15 can prevent air in the settled material in the fine powder separator 8 from entering the fine powder separator 8 in the discharging process, so as to play the role of the same blanking air-locking.
As shown in fig. 4, a third bucket elevator 16 is further arranged between the upper scattering port 83 and the settled material discharging port 82, the third bucket elevator 16 is arranged on the downstream side of the second air-locking blanking valve 15, and the third bucket elevator 16 can lift settled material above the fine powder selector 8 and feed the settled material into the fine powder selector 8 through the upper scattering material feeding port 83; the top of the fine powder separator 8 is also provided with a material scattering table 84, the material scattering table 84 is matched with the upper material scattering opening 83, and the settled material entering the fine powder separator 8 falls into the material scattering table 84 immediately to realize uniform material scattering of the material, so that secondary powder selection is performed, and fine powder meeting the granularity of raw materials is selected and sent to a raw material homogenization warehouse or is converged with a main flow finished product to enter a raw material planning warehouse.
The technological process of the improved raw material roller press finish grinding system comprises the following steps:
(1) Raw materials are proportioned by a metering scale, if the proportioned fresh raw materials have larger water content, the raw materials are directly sent to a roller press 4 to generate cakes, so that the cakes are difficult to break up, further the follow-up powder selection is influenced, and even the raw materials are adhered to a roller of the roller press 4, so that the raw materials are required to be sent to a V-selection 6 through a feeding belt conveyor 11; meanwhile, high Wen Yaowei flue gas from the cement kiln system enters the V-separation 6 through the air inlet of the V-separation 6, and raw materials and high-temperature hot air are mixed in the V-separation 6 to realize drying and primary separation of the raw materials.
(2) Coarse powder after being sorted by the V-selector 6 is sent into the steady flow bin 1 through the second bucket elevator 7, the manual valve 2 and the automatic quick stop valve 3 are opened, the coarse powder enters the roller press 4 to finish material extrusion, then is sent into the V-selector 6 through the first bucket elevator 5, and enters the V-selector 6 again together with fresh raw materials from the batching station for grading and drying.
(3) The fine powder of the V-separation 6 rises along with the air flow and is brought into the fine powder separator 8, the fine powder meeting the raw material granularity requirement passes through a rotor cage to be selected as a raw material finished product, and enters a cyclone 9 to complete gas-solid separation under the action of a circulating fan 10, the separated fine powder is sent into a raw material homogenization warehouse under the action of a chute 12 and a chute fan 13, and the air flow after gas-solid separation is circulated back to the V-separation 6 through the circulating fan 10 or is sent into an exhaust gas treatment system; the coarse powder not selected as the raw material finished product is returned to the roll press 4 via the coarse powder outlet 81 for cyclic extrusion.
(4) The fine powder carried into the fine powder separator 8 along with the powder selecting airflow is gradually reduced due to the wind speed in the rising process, so that part of the fine powder is settled and discharged from the settled material outlet 82, and then secondary powder selecting is completed by the aid of the upper material scattering port 83 and the material scattering table 84 under the action of the third bucket elevator 16, and the fine powder is returned to the fine powder separator 8.
(5) When the water content of the fresh raw materials after the proportioning is smaller, the fresh raw materials can be completely fed into the steady flow bin 1 and then enter the roller press 4 to be extruded and ground firstly, as shown in fig. 5.
(6) If the fine powder selecting efficiency of the fine powder selecting machine 8 is not high, the leaked fine powder enters the steady flow bin 1 and the roller press 4, and the stability of a material bed of the roller press 4 is affected by more fine powder, even the roller press 4 generates vibration; at this time, the coarse powder outlet 81 of the fine powder separator 8 is connected with the feed inlet of the V-separator 6, and the fine powder leaked from the fine powder separator 8 is brought into the fine powder separator 8 again through the airflow of the V-separator 6 to realize secondary powder separation of the fine powder, and the content of the fine powder of the raw material entering the roller press 4 is reduced, so that stable and efficient work of the roller press 4 is realized, as shown in fig. 6.
According to the invention, the top of the fine powder concentrator is provided with the upper material scattering port 83, the side surface of the fine powder concentrator 8 is provided with the coarse powder outlet 81 and the sedimentation material outlet 82, fine powder settled in the fine powder concentrator 8 can enter the fine powder concentrator 8 again through the sedimentation material outlet 82 and the coarse powder outlet 81 and is matched with the material scattering table 84 to finish secondary powder concentration, so that the powder concentration in air flow is reduced to enhance the carrying capacity of the air flow, meanwhile, the fine powder is prevented from entering the roller press to be circularly extruded, the fine powder content of the roller press material is further reduced to improve the extrusion acting effect of the roller press, and the system stability is improved, and the system yield and the powder discharging quality are ensured.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; while the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that modifications may be made to the techniques described in the foregoing embodiments, or that certain features may be substituted for those illustrated therein; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. An improved raw material roller press finish grinding system comprises a feeding belt conveyor, a V-shaped separator, a second bucket elevator, a steady flow bin, a manual valve, an automatic quick stop valve, a roller press and a first bucket elevator which are sequentially connected along a material path, wherein a discharge port of the first bucket elevator is connected with a feed port of the V-shaped separator; still include cyclone and chute that link to each other in proper order along the powder way, still include circulating fan and chute fan, circulating fan's air intake links to each other with the air outlet of cyclone, and chute fan's air outlet links to each other with the air intake of chute, its characterized in that: the cyclone separator is characterized by further comprising a fine powder separator which is connected in series between an air outlet of the V-shaped separator and an air inlet of the cyclone cylinder, wherein a coarse powder outlet and a sedimentation material outlet are arranged on the side face of the fine powder separator, and the coarse powder outlet is connected with a feeding hole of the steady flow bin; the top of the fine powder separator is also provided with an upper material scattering port which is connected with a sedimentation material discharging port; the coarse powder outlet is also provided with a first air locking blanking valve, and the sedimentation material outlet is also provided with a second air locking blanking valve.
2. The improved finish grinding system of a raw material roll squeezer of claim 1, wherein: a third bucket elevator is further arranged between the upper material scattering port and the sedimentation material discharging port, the third bucket elevator is arranged on the downstream side of the second air locking blanking valve, a material scattering table is further arranged at the top of the fine powder selecting machine, and the material scattering table is matched with the upper material scattering port.
3. The technological process of an improved raw material roller press finish grinding system is characterized in that: the method comprises the following steps:
(1) The raw materials are proportioned by a metering scale, and if the proportioned fresh raw materials have larger water content, the raw materials are firstly sent into a V selection through a feeding belt conveyor; meanwhile, high Wen Yaowei flue gas from the cement kiln system enters the V-selection through the V-selection air inlet, and raw materials and high-temperature hot air are mixed in the V-selection to realize drying and primary separation of the raw materials;
(2) Feeding the coarse powder after V-selection sorting into a steady flow bin through a second bucket elevator, opening a manual valve and an automatic quick stop valve, feeding the coarse powder into a roller press to finish material extrusion, feeding the coarse powder into V-selection through a first bucket elevator, and feeding the coarse powder into V-selection together with fresh raw materials from a batching station for grading and drying;
(3) The fine powder selected by V rises along with the air flow and is brought into a fine powder selecting machine, the fine powder meeting the raw material granularity requirement passes through a rotor cage to be selected as a raw material finished product and enters a cyclone barrel to complete gas-solid separation under the action of a circulating fan, the separated fine powder is sent into a raw material homogenizing warehouse under the action of a chute and a chute fan, and the air flow after gas-solid separation is circulated back to V through the circulating fan or is sent into an exhaust gas treatment system; coarse powder which is not selected as a finished product of the raw material is returned to the roller press for circular extrusion through a coarse powder outlet;
(4) The fine powder carried into the fine powder selecting machine along with the powder selecting air flow is gradually reduced due to the wind speed in the rising process, so that part of the fine powder is settled and discharged from a settled material discharging port, and then secondary powder selecting is completed by virtue of a feeding hole and a feeding table under the action of a third bucket elevator and returned to the fine powder selecting machine;
(5) When the water content of the fresh raw materials after the proportioning is smaller, the fresh raw materials can be completely sent into a steady flow bin and then enter a roller press to be extruded and ground firstly;
(6) If the fine powder selecting efficiency of the fine powder selecting machine is not high, the missed fine powder enters a steady flow bin and a roller press, and the stability of a material bed of the roller press is affected by more fine powder, even the roller press is caused to vibrate; at this time, the coarse powder outlet of the fine powder separator is connected with the feeding inlet of the V-type separator, and the fine powder leaked and selected by the fine powder separator is brought into the fine powder separator again through the airflow of the V-type separator so as to realize secondary powder separation of the fine powder, reduce the content of the fine powder of the raw materials entering the roller press and realize stable and efficient work doing of the roller press.
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| CN202011380569.7A CN112473995B (en) | 2020-11-30 | 2020-11-30 | Improved raw material roller press final grinding system and process flow thereof |
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| CN202011380569.7A CN112473995B (en) | 2020-11-30 | 2020-11-30 | Improved raw material roller press final grinding system and process flow thereof |
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| CN112473995B true CN112473995B (en) | 2024-05-28 |
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| CN114570499A (en) * | 2022-02-28 | 2022-06-03 | 中信重工机械股份有限公司 | Industrial waste residue grinding system |
| CN115463834A (en) * | 2022-08-15 | 2022-12-13 | 成都建筑材料工业设计研究院有限公司 | Multi-particle size distribution powder preparation system and method |
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| CN210497252U (en) * | 2019-07-15 | 2020-05-12 | 湖州刚强水泥有限公司 | Quick winnowing device for cement clinker |
| CN111569994A (en) * | 2020-05-25 | 2020-08-25 | 中国中材国际工程股份有限公司 | Raw material roller press final grinding double-fan system and rolling method |
| CN214320447U (en) * | 2020-11-30 | 2021-10-01 | 南京凯盛国际工程有限公司 | Improved generation raw materials roll squeezer finish grinding system |
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2020
- 2020-11-30 CN CN202011380569.7A patent/CN112473995B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031948A (en) * | 1988-04-01 | 1989-03-29 | 国家建筑材料工业局科学技术开发服务中心 | The improvement of cyclone type powder sorting machine |
| CN203737590U (en) * | 2014-02-24 | 2014-07-30 | 中国矿业大学 | Novel gravity air classifier |
| CN204352972U (en) * | 2014-11-26 | 2015-05-27 | 中国中材国际工程股份有限公司 | A kind of roll squeezer-ball mill Joint grinding system configuring many composition dividing powder separating machines |
| CN106694187A (en) * | 2015-07-27 | 2017-05-24 | 南京凯盛国际工程有限公司 | Cement semi-finish grinding system with steady flow metering device |
| CN210497252U (en) * | 2019-07-15 | 2020-05-12 | 湖州刚强水泥有限公司 | Quick winnowing device for cement clinker |
| CN111569994A (en) * | 2020-05-25 | 2020-08-25 | 中国中材国际工程股份有限公司 | Raw material roller press final grinding double-fan system and rolling method |
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Address after: 303 Hanzhongmen street, Gulou District, Nanjing City, Jiangsu Province Applicant after: Zhongcai International Intelligent Technology Co.,Ltd. Address before: 303 Hanzhongmen street, Gulou District, Nanjing City, Jiangsu Province Applicant before: NANJING KISEN INTERNATIONAL ENGINEERING Co.,Ltd. |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |