WO2021093256A1 - 一种生料立磨外循环系统及工艺 - Google Patents
一种生料立磨外循环系统及工艺 Download PDFInfo
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- WO2021093256A1 WO2021093256A1 PCT/CN2020/082623 CN2020082623W WO2021093256A1 WO 2021093256 A1 WO2021093256 A1 WO 2021093256A1 CN 2020082623 W CN2020082623 W CN 2020082623W WO 2021093256 A1 WO2021093256 A1 WO 2021093256A1
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- powder
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- mill
- external circulation
- vertical mill
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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
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/007—Mills with rollers pressed against a rotary horizontal disc
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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
- B02C23/20—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating
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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
- B02C23/34—Passing gas through crushing or disintegrating zone gas being recirculated to crushing or disintegrating zone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
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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
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier
Definitions
- the invention relates to a material bed grinding equipment, in particular to an external circulation system and process of a raw material vertical mill.
- the purpose of the present invention is to overcome the above-mentioned problems and provide a raw material vertical mill external circulation system and process.
- the method adopted by the present invention is: a raw material vertical mill external circulation system, including a batching belt conveyor, a hoist, a feeding conveying mechanism, a feeding tee, a V-type powder separator, and an external circulation roller vertical mill , Cyclone, circulating fan and dust collector;
- the external circulation roller type vertical mill includes a lower grinding cylinder and an upper powder selection cylinder.
- a mill is arranged in the grinding cylinder, and the powder selection cylinder is arranged There is a powder separator, the grinding cylinder and the powder separator are separated by a partition plate, and the outlet of the powder separator coarse powder ash hopper of the powder separator extends through the partition plate to the powder Inside the mill cylinder;
- the batching belt conveyor feeds the ingredients to the upper feeding conveying mechanism through the elevator, the feeding conveying mechanism discharges through the feeding tee, one end of the feeding tee is connected to the feeding conveying mechanism, one end is discharged outside, and the other end Connect the feed port of the V-type powder separator;
- the V-type powder separator is used for the primary selection of the mixing material, the hot air is passed through the V-type powder separator, and the fine powder outlet of the V-type powder separator is connected to the
- the upper part of the external circulation roller vertical mill is connected with the air inlet cylinder of the powder separator, the coarse powder outlet of the V-type powder separator is connected with the buffer si
- an air inlet is provided at the lower part of the powder separator cylinder, and the air inlet is connected with the circulating fan and the air outlet of the V-shaped powder separator.
- an air lock flap valve is installed under the partition plate.
- the coarse powder outlet of the V-shaped powder concentrator is connected to the inlet of the external circulation roller vertical mill through a buffer bin and a hoist.
- the invention also discloses the production process of the external circulation system of the raw material vertical mill, which includes the following steps:
- the feeding conveying mechanism sends the ingredients to the V-type powder concentrator through the feeding tee for the primary selection of the mixing;
- the mill at the lower part of the external circulation roller vertical mill grinds the coarse powder material, discharges the material from the discharge port of the mill, and sends it to the feeding elevator through the belt conveyor, and so on.
- step (4) in addition to circulating the gas separated by the cyclone into the separator, a part of the gas needs to be removed by the dust collector, and then the solids are collected and sent to the finished product warehouse.
- the external circulation of the vertical mill materials can be realized.
- the materials are no longer pneumatically transported to the powder separator for sorting, and the hoist is used for centralized mechanical transportation, which greatly reduces the air flow resistance and greatly reduces the power consumption.
- the powder separation operation can be carried out by the powder separator system on the upper part of the mill.
- the powder separator is located above the mill, which can greatly reduce civil construction costs and greatly save equipment investment.
- the materials to be sorted enter the powder separator for selection, they are roughly selected by a V-shaped powder separator to reduce the impact of large particles on the powder separator, and the hot air from the V-shaped powder separator is used to complete the raw materials. Drying, improve the sorting efficiency of the powder separator.
- Figure 1 is a schematic diagram of the structure of the present invention.
- the serial numbers in the figure are: 29. Batching belt conveyor; 30. Feeding hoist; 31. Feeding conveying mechanism; 32. Feeding tee; 33. V-type powder separator; 34. Buffer bin; 35. Grinding belt conveyor 36. Feeding elevator; 37. Roller vertical mill; 38. Cyclone; 39. Circulating fan; 40. Bag dust collector; 41. Finished product air delivery chute; 42, warehousing elevator; 43. Finished product Library.
- Figure 2 is a schematic diagram of the structure of the external circulation roller vertical mill of the present invention.
- the components in the figure are: 1. Air outlet; 2. Reducer; 3. Motor; 4. Upper cylinder; 5. Main shaft assembly; 6. Labyrinth seal; 7. Wind guide blade; 8. Rotary cage; 9. Powder selection cylinder; 10. Primary feed inlet; 11. Powder selection coarse powder ash hopper; 12. Air inlet; 13. Partition plate; 14. Air lock flap valve; 15. Grinding roller; 16. Rocker arm; 17. Grinding disc; 18. Shaft support; 19, nozzle ring; 20, discharge ring; 21, scraper; 22, discharge port; 23, reducer; 24, main motor; 25, hydraulic cylinder; 26 , Grinding cylinder; 27. Air inlet cylinder; 28. Constraint air duct ring.
- Fig. 3 is a view from the A-A direction of Fig. 2 of the present invention.
- this embodiment discloses a raw meal vertical mill external circulation system, including a batching belt conveyor 29, a feeding elevator 30, a feeding conveying mechanism 31, a feeding tee 32, a V-shaped powder separator 33, Buffer warehouse 34; Outgoing belt conveyor 35; Feeding hoist 36, external circulation roller vertical mill 37, cyclone 38, circulation fan 39 and bag filter 40, finished product air conveying chute 41, warehouse hoist 42 , Finished product library 43.
- the external circulation roller vertical mill 37 includes a lower grinding cylinder 26, an air inlet cylinder 27, and an upper powder separator cylinder 9.
- a mill is installed in the grinding cylinder 26, and the powder separator cylinder
- the batching belt conveyor 29 sends the prepared materials to the upper feeding conveying mechanism 31 through the feeding hoist 30.
- the feeding conveying mechanism 31 discharges the materials through the feeding tee 32, and one end of the feeding tee 32 is connected to the feeding conveying mechanism 31. , One end is outside the row, and one end is connected to the feed port of the V-type powder separator 33.
- the V-shaped powder separator 33 is used for the primary selection of the mixture. Hot air is passed through the V-shaped powder separator 33.
- the fine powder outlet of the V-shaped powder separator 33 and the external circulation roller vertical mill 37 The upper part of the powder separator is connected to the air inlet cylinder 27, and the coarse powder outlet of the V-type powder separator 33 passes through the buffer bin 34 and the feeding hoist 36 and the outer circulation roller type vertical mill 37.
- the air outlet 1 of the powder separator is connected to the cyclone cylinder 38, and the discharge end of the cyclone cylinder 38 sends the materials into the finished product warehouse 43 through the air conveying chute 41 and the warehouse hoist 42;
- the discharge port 22 of the machine is connected to the feeding hoist 30 through a grinding belt conveyor 35.
- the process of the external circulation system of the raw material vertical mill includes the following steps:
- the feeding conveying mechanism 31 sends the ingredients to the V-type powder separator 33 through the feeding tee 32 for the primary selection of mixing;
- Hot air is introduced into the V-type powder separator 33 to disperse the materials while drying the moisture in the raw materials, and perform a preliminary selection.
- the finer powders selected are brought into the above-mentioned external environment by the wind.
- the coarse powder material is sent to the primary feed port 10 of the outer circulation roller vertical mill 37 through the buffer bin 34 and the feeding elevator 36 to enter the mill for grinding.
- the air outlet 1 of the upper powder separator of the external circulation roller type vertical mill 37 discharges the fine powder that contains the qualified fineness required. After being separated by the cyclone 38, the fine powder is collected, and the fine powder is blown through the raw material product.
- the chute 41 enters the storage hoist 42; the gas from the cyclone 38 is partially circulated again by a circulating fan 39, and the circulating gas enters the powder separator on the upper part of the vertical mill for winnowing. Part of the gas separated by the cyclone 38 needs to be dusted by the dust collector 40, and then the fine powder is collected and sent to the finished product warehouse.
- the powder selection operation can be carried out by using the powder separator system above the mill.
- the powder separator is located above the vertical mill, which can greatly reduce civil construction costs and greatly save equipment investment.
- the materials to be sorted enter the powder separator for selection, they are roughly selected by a V-shaped powder separator to reduce the impact of large particles on the powder separator, and the hot air from the V-shaped powder separator is used to complete the raw materials. Drying, complete the drying operation and improve the sorting efficiency of the classifier.
- FIG. 2 it is a schematic diagram of the structure of the external circulation roller vertical mill of the present invention, including a mill shell, a grinding disc 17 and a grinding roller 15 are arranged in the mill shell, and the upper part of the mill shell is arranged There is a powder separator, the grinding disc 17 is installed on the reducer 23, and the main motor 24 provides power to the reducer 23.
- the grinding roller 15 is arranged on the shaft support 18 through the rocker arm 16, and is equally divided and evenly distributed around the periphery of the mill shell.
- the rocker arm 16 is also connected to a hydraulic cylinder 25.
- a ring-shaped partition plate 13 is provided in the middle and upper part of the mill housing to divide the mill housing into a grinding cylinder body 26 and a powder selecting cylinder body 27.
- An air lock flap valve 14 is installed under the partition plate 13.
- a powder classifier is provided in the powder classifying cylinder 9, and the outlet of the powder classifying coarse powder ash hopper 11 of the powder classifier passes through the annular partition plate 13 and extends into the grinding cylinder body. In 26, the outlet of the powder ash hopper 11 corresponds to the center of the grinding disc 17.
- An air inlet tube 27 is provided at the lower part of the powder separator tube 9, and an air inlet 12 is provided on the periphery of the air inlet tube 27.
- the grinding disc 17 and the grinding roller 15 are arranged in the lower part of the grinding cylinder 26, a spout ring 19 is arranged between the outer circumference of the grinding disc 17 and the mill shell, and a discharge ring is arranged in the lower part of the spout ring 19 20.
- a discharge port 22 is also provided at the bottom of the discharging ring 20, and a scraper 21 is installed around the grinding disc. The scraper 21 scrapes the material to the lower discharge port 22, thereby discharging Outside the mill.
- a material conveying mechanism is also provided at the discharge port 22. The material conveying mechanism sends the material into the V-type powder separator 34 for rough selection. The rough material after the rough selection is separated from the buffer bin 35 and the feeding elevator 37. And connected with the primary feed port 10 of the mill.
- the rotating cage 8 inside the powder separator is connected to the reducer 2 of the powder separator through the main shaft assembly 5, and the reducer 2 is driven by the main shaft transmission motor 3, and the transmission device is installed on the upper cylinder 4.
- a labyrinth seal 6 is arranged on the upper part of the rotating cage 8 to separate the material entering the powder selection area from the inside of the rotating cage 8.
- the large-particle materials that need to be ground and the coarse powder that has been sorted by the V-type powder separator 34 are transported and enter through the primary feed inlet 10, and enter together with the sorted coarse powder in the powder hopper 11 Grinding is carried out in the mill.
- the material is in the grinding cylinder 26.
- the mill drive part composed of the main motor 24 and the reducer 23 drives the grinding disc 17 to rotate, and the intermediate material moves to the periphery due to the rotating centrifugal force, and then moves to the grinding disc.
- the area between 17 and the grinding roller 15 is rolled.
- the grinding roller 15 is pressed downward by the hydraulic cylinder 25, the rocker arm 16 and the shaft support 18, and the rolled material moves outward and turns out the stopper.
- the ring falls into the discharge ring 20 through the nozzle ring 19, and the material is scraped to the discharge port 22 by the scraper 21 installed at the lower part of the grinding disc.
- the fine powder separated by the V-shaped powder separator 34 is carried by the gas, enters the powder separator through the air inlet 12 of the air inlet cylinder 27, and enters the powder separator formed by the air guide blade 7 and the rotating cage 8 through the air guide blade 7
- the rotating cage 8 is driven by the motor 3 on the upper part of the powder separator, the belt reducing machine 2 and the main shaft assembly 5 to rotate, and the incoming materials are sorted.
- the ring-shaped powder selecting area is contained in the powder selecting cylinder 9.
- the gas required for powder selection Then it enters from the air inlet 12, and the airflow entering the air inlet cylinder 27 rotates upwards, and enters the powder selection area through the air guide blade 7.
- the rotating cage 8 rotates, the incoming materials are sorted.
- the coarse particles are separated due to the quality If the centrifugal force is large, it cannot enter the inside of the separator basket 8.
- the coarse particles fall into the powder separator and coarse powder ash hopper 11 and are fed into the mill together with the large particles from the primary feed port 10 for compaction.
- the fine powder in the powder selection area due to its low mass and low centrifugal force, it is sucked by the gas and carried into the basket 8 and moves upwards into the upper cylinder 4, and exits from the air outlet 1 into the subsequent cyclone. 38.
- the fine powder is separated from gas and solid, and the fine powder is collected, and the gas enters the circulating fan behind the cyclone cylinder 38.
- One part circulates into the air inlet 12 again, enters the next round of sorting, and the other part enters a dust collector The device collects fine powder.
- the air flow used for the powder separator is supplied by a circulating fan 39, and a gas flow field is formed inside the powder separator.
- a labyrinth seal 6 is arranged on the upper part of the rotating cage 8 to separate the materials entering the powder selection area from the inside of the rotating cage 8 to prevent the coarse particles permeated in the gas from entering the inside of the rotating cage without being sorted, causing the powder to be coarsely selected.
- the material is discharged into the mill for grinding.
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Abstract
一种生料立磨外循环系统，包括配料皮带机（29）、入料提升机（30）、送料传送机构（31）、送料三通（32）、V型选粉机（33）、外循环辊式立磨（37）、旋风筒（38）、循环风机（39）以及袋式除尘器（40）；外循环辊式立磨（37）包括下部的粉磨筒体（26）以及上部的选粉筒体（9），在粉磨筒体（26）内设置有磨机，在选粉筒体（9）内设置有选粉机，粉磨筒体（26）与选粉筒体（9）之间通过分隔板（13）隔开，选粉机的选粉粗粉灰斗（11）的出口穿过分隔板（13）伸入到粉磨筒体（26）内。
Description
本发明涉及一种料床粉磨设备，特别涉及一种生料立磨外循环系统及工艺。
目前水泥生产线中生料生产大多采用辊式立磨设备，该传统粉磨设备存在产量偏低及电耗较高的问题。由于系统工艺为传统工艺，磨内物料需要风力输送及喷口环喷吹等，大大增加了气体流动阻力，导致磨机系统阻力达到8000-10000Pa甚至更高，另外由于选粉机结构原因，选粉能力不足，回粉量大，造成分级效率低下，影响磨机能力的发挥。另外，研磨机构参数设计不合理，也是影响生料立磨系统产能的因素之一。需要对生料粉磨系统进行提产节能技术升级，增加系统产量，降低系统电耗。
发明内容
本发明的目的是为了克服上述问题，提供一种生料立磨外循环系统及工艺。
为达到上述目的，本发明采用的方法是：一种生料立磨外循环系统，包括配料皮带机、提升机、送料传送机构、送料三通、V型选粉机、外循环辊式立磨、旋风筒、循环风机以及除尘器；所述的外循环辊式立磨包括下部的粉磨筒体以及上部的选粉筒体，在粉磨筒体内设置有磨机，在选粉筒体内设置有选粉机，粉磨筒体与选粉筒体之间通过分隔板隔开，选粉机的选粉粗粉灰斗的出口穿过所述的分隔板伸入到所述的粉磨筒体内；所述的配料皮带机通过提升机将配料送入上方的送料传送机构，送料传送机构通过送料三通下料，送料三通的一端连接送料传送机构，一端外排，还有一端连接V型选粉机进料口；所述的V型选粉机用于混料的初选，在所述的V型选粉机中通热风，V型选粉机的细粉料出口与外循环辊式立磨上部的选粉机进风筒体连接，V型选粉机的粗粉料出口与缓冲小仓及喂料提升机相连，再与磨机一次进料口连接；所述的选粉机的出风口与旋风筒连接，所述的旋风筒的出料端通过传送机构将物料送入成品库；所述的磨机的出料口通过皮带机与入料提升机连接。
作为本发明的一种改进，在选粉筒体的下部设置有进风口，该进风口与循环风机以及V型选粉机出风口连接。
作为本发明的一种改进，在所述的分隔板下安装有锁风翻板阀。
作为本发明的一种改进，所述的V型选粉机的粗粉料出口通过缓冲仓以及提升机与外循环辊式立磨的进料口连接。
本发明还公开了上述生料立磨外循环系统的生产工艺，包括以下步骤：
(1)、在配料皮带机上进行配料，配好的料经过提升机送入上部的送料传送机构上；
(2)、送料传送机构通过送料三通将配料送入到V型选粉机进行混料的初选；
(3)、在V型选粉机中通入热风，将物料打散同时烘干原料中的水分，并进行初选，初选出的较细粉料由风带进上述所述的外循环辊式立磨上部选粉机内，然后通过静态导风叶片和动态转笼，将物料分选出满足合格细度要求的成品；V型选粉机初选出的粗粉料则通过输送设备送入到外循环辊式立磨下部的磨机内进行研磨；
(4)、外循环辊式立磨上部选粉机的出风口排出的含有合格细度要求细粉体，经旋风筒分离后，将收集到的细粉通过输送设备送入到成品库储存；
(5)、外循环辊式立磨下部的磨机将粗粉料研磨后，从磨机出料口出料，经过皮带机送入到喂料提升机中，如此循环。
作为本发明的一种改进，步骤(4)中，经旋风筒分离后的气体除了循环进入选粉机外，一部分还需经过除尘器除尘后，将固体收集送入成品库中。
通过这样的工艺流程可实现立磨物料的外部循环，物料不再通过气力输送到选粉机进行分选，采用提升机集中机械输送，大大降低气流阻力，大幅度降低电耗。选粉作业可利用磨机上部的选粉机系统进行分选，选粉机在磨机的上方，可大大减少土建费用，也可大大节省设备投入。待分选的物料在进入选粉机精选前，通过一台V型选粉机进行粗选，减少大颗料对选粉机的影响，并且通过V型选粉机进入的热风完成原料的烘干，提高选粉机的分选效率。
图1为本发明的结构示意图。
图中各序号为：29、配料皮带机；30、入料提升机；31、送料传送机构；32、送料三通；33、V型选粉机；34、缓冲仓；35、出磨皮带机；36、喂料提升机；37、辊式立磨；38、旋风筒；39、循环风机；40、袋式除尘器；41、成品风送斜槽；42、入库提升机；43、成品库。
图2为本发明的外循环辊式立磨的结构示意图。
图中各部件为：1、出风口；2、减速机；3、电动机；4、上部筒体；5、主轴总成；6、迷宫密封；7、导风叶片；8、转笼；9、选粉筒体；10、一次进料口；11、选粉粗粉灰斗；12、进风口；13、分隔板；14、锁风翻板阀；15、磨辊；16、摇臂；17、磨盘；18、轴座支架；19、喷口环；20、出料环道；21、刮料板；22、出料口；23、减速机；24、主电机；25、液压油缸；26、粉磨筒体；27、进风筒体；28、约束风道环。
图3为本发明图2的A-A向视图。
下面结合附图和具体实施例，进一步阐明本发明，本实施例在以本发明技术方案为前提下进行实施，应理解这些实施例仅用于说明本发明而不用于限制本发明的范围。
如图1所示，本实施例公开了一种生料立磨外循环系统，包括配料皮带机29、入料提升机30、送料传送机构31、送料三通32、V型选粉机33、缓冲仓34；出磨皮带机35；喂料提升机36、外循环辊式立磨37、旋风筒38、循环风机39以及袋式除尘器40、成品风送斜槽41、入库提升机42、成品库43。
所述的外循环辊式立磨37包括下部的粉磨筒体26、进风筒体27以及上部的选粉筒体9，在粉磨筒体26内设置有磨机，在选粉筒体9内设置有选粉机，粉磨筒体26与进风筒体27之间通过分隔板隔开，选粉机的选粉粗粉灰斗的出口穿过所述的分隔板13伸入到所述的粉磨筒体26内，此处的结构具体参照附图2。
所述的配料皮带机29通过入料提升机30将配好的物料送入上方的送料传送机构 31，送料传送机构31通过送料三通32下料，送料三通32的一端连接送料传送机构31，一端外排，还有一端连接V型选粉机33的进料口。
所述的V型选粉机33用于混合料的初选，在所述的V型选粉机33中通热风，V型选粉机33的细粉料出口与外循环辊式立磨37上部的选粉机进风筒体27连接，V型选粉机33的粗粉料出口通过缓冲仓34以及喂料提升机36与外循环辊式立磨37下部的磨机一次进料口10连接。
所述的选粉机的出风口1与旋风筒38连接，所述的旋风筒38的出料端通过风送斜槽41、入库提升机42将物料送入成品库43；所述的磨机的出料口22通过出磨皮带机35与入料提升机30连接。
上述生料立磨外循环系统的工艺，包括以下步骤：
(1)、各组分物料在配料皮带机29上进行配料，配好的料经过入料提升机30送入上部的送料传送机构31上；
(2)、送料传送机构31通过送料三通32将配料送入到V型选粉机33进行混料的初选；
(3)、在V型选粉机33中通入热风，将物料打散同时烘干原料中的水分，并进行初选，初选出的较细粉料由风带进上述所述的外循环辊式立磨37上部选粉机内，然后通过选粉机内部静态导风叶片7和动态转笼8，将物料分选出满足合格细度要求的成品；V型选粉机初选出的粗粉料通过缓冲仓34及喂料提升机36送入到外循环辊式立磨37的一次进料口10进入磨机内进行研磨。
(4)、外循环辊式立磨37上部选粉机的出风口1排出的含有合格细度要求细粉体，经旋风筒38分离后，细粉收集下来，细粉通过生料成品风送斜槽41进入入库提升机42内；旋风筒38出来的气体则由一台循环风机39再次进行部分循环，该循环气体再次进入立磨上部选粉机内进行风选。经旋风筒38分离后的气体一部分还需经过除尘器40除尘后，将细粉收集送入成品库中。
(5)、外循环辊式立磨37下部的磨机将粗粉料研磨后，从磨机出料口22出料，经过出磨皮带机35送入到入料提升机36中，如此循环。
通过这样的工艺流程可实现立磨物料的外部循环，物料不再通过内部气力输送将物料送到选粉机内进行分选，采用提升机集中机械输送，大大降低气流阻力，大幅度降低电耗。选粉作业可利用磨机上方的选粉机系统进行分选，选粉机在立磨的上方，可大大减少土建费用，也可大大节省设备投入。待分选的物料在进入选粉机精选前，通过一台V型选粉机进行粗选，减少大颗料对选粉机的影响，并且通过V型选粉机进入的热风完成原料的烘干，完成烘干作业并且提高选粉机的分选效率。
如图2所示，为本发明的外循环辊式立磨的结构示意图，包括磨机壳体，在所述的磨机壳体内设置有磨盘17以及磨辊15，在磨机壳体上部设置有选粉机，所述的磨盘17安装在减速机23上，由主电机24给减速机23提供动力。磨辊15通过摇臂16设置在轴座支架18上，且等分均匀分布在磨机壳体周边。所述的摇臂16还与液压油缸25相连。
在磨机壳体的中上部设置有一环形的分隔板13将磨机壳体分隔成粉磨筒体26以及选粉筒体27，分隔板13下安装有锁风翻板阀14。在所述的选粉筒体9内设置有选粉机，选粉机的选粉粗粉灰斗11的出口穿过所述的环形的分隔板13伸入到所述的粉磨筒体26内，选粉粗粉灰斗11的出口与磨盘17的中心对应。
在选粉筒体9的下部设置有进风筒体27，进风筒体27外围设置进风口12，在本实施例中进风口12设置有两个或者更多，进风口12与循环风机33及V型选粉机34出风口相连，选粉所需要的气体则由该进风口12处进入，进风筒体27内侧设置约束风道环，用于进风筒体27内气体流动顺畅。
所述的磨盘17以及磨辊15设置在粉磨筒体26的下部，在磨盘17的外圆周与磨机壳体之间设置有喷口环19，在喷口环19的下部设置有出料环道20，在所述的出料环道20的底部还设置有出料口22，在磨盘四周安装有刮料板21，由刮料板21将物料刮至下部的出料口22，由此排出磨机外。在出料口22处还设置有物料输送机构，所述的物料输送机构将物料送入V型选粉机34内进行粗选，粗选后的粗物料由缓冲仓35和喂料提升机37并与磨机的一次进料口10连接。
选粉机内部的转笼8通过主轴总成5与选粉机减速机2相连，该减速机2由主轴传动电机3带动，该传动装置安装在上部筒体4上。
在所述的转笼8上部设置有一迷宫密封6，将进入选粉区域的物料与转笼8内部分开。
外循环辊式立磨的具体工作流程：
需要粉磨的大颗粒物料以及经过V型选粉机34分选后的粗粉经过输送由一次进料口10进入，并和选粉粗粉灰斗11里的分选后的粗粉一起进入磨内进行粉磨，物料在粉磨筒体26内，由主电机24和减速机23组成的磨机传动部分带动磨盘17旋转，将中间物料因旋转离心力作用，物料向外围移动，移动到磨盘17与磨辊15之间区域进行碾压，磨辊15由液压油缸25、摇臂16以及轴座支架18的作用，向下施加碾压力，碾压过的物料向外运动翻出挡料圈，通过喷口环19处落入到出料环道20中，由安装在磨盘下部的刮料板21将物料刮到出料口22处。
经过V型选粉机34分选后的细粉由气体携带，通过进风筒体27的进风口12进入选粉机，通过导风叶片7进入由导风叶片7和转笼8所形成的环形选粉区域，转笼8在选粉机上部的电机3和减带机2以及主轴总成5的带动下旋转，将进入的物料进行分选。
该环形选粉区域包含在选粉筒体9内，在选粉筒体9下部有进风筒体27，进风筒体27上有二个或多个进风口12，选粉所需要的气体则由该进风口12进入，进入进风筒体27的气流旋转向上，通过导风叶片7进入到选粉区域，随着转笼8的旋转，对进入的物料进行分选，粗颗粒由于质量大，其离心力大，则不能进入选粉机转笼8内部，粗颗粒则落入到选粉粗粉灰斗11中与一次进料口10进入的大颗粒一起喂入磨机内进行碾压粉磨，在选粉区域的细粉由于质量小，离心力小，则被气体抽吸携带进入转笼8内部，并向上运动到上部筒体4内，并由出风口1出去进入后续的旋风筒38，将细粉气固分离，细粉收集下来，气体则进入旋风筒38后面的循环风机内，一部分再次循环进入进风口12，进入下一轮的分选作用，另一部分则进入一台除尘器进行细粉的收集。
选粉用的气流由一台循环风机39进行供给，在选粉机内部形成一个气体流场。
在转笼8上部设置一迷宫密封6，将进入选粉区域的物料与转笼8内部分开，防止该处弥漫在气体中的粗颗粒没有分选而直接进入转笼内部造成选粉跑粗的情况。
在进风筒体下部的分隔板13下，安装有几个锁风翻板阀14，主要用于防止进风筒体27下部分隔板上由于风速变化而导致积料，如果有积料，就由该处的锁风翻板阀14将物
料排出到磨内进行粉磨。
本发明方案所公开的技术手段不仅限于上述技术手段所公开的技术手段，还包括由以上技术特征任意组合所组成的技术方案。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围。
Claims (6)
- 一种生料立磨外循环系统，其特征在于：包括配料皮带机、入料提升机、送料传送机构、送料三通、V型选粉机、喂料提升机、外循环辊式立磨、旋风筒、循环风机以及除尘器；所述的外循环辊式立磨包括下部的粉磨筒体以及上部的选粉筒体，在粉磨筒体内设置有磨机，在选粉筒体内设置有选粉机，粉磨筒体与选粉筒体之间通过分隔板隔开，选粉机的选粉粗粉灰斗的出口穿过所述的分隔板伸入到所述的粉磨筒体内；所述的配料皮带机通过入料提升机将配料送入上方的送料传送机构，送料传送机构通过送料三通下料，送料三通的一端连接送料传送机构，一端外排，还有一端连接V型选粉机进料口；所述的V型选粉机用于混料的初选，在所述的V型选粉机中通热风，V型选粉机的细粉料出口与外循环辊式立磨上部的选粉机进风筒体进风口连接，V型选粉机的粗粉料出口与外循环辊式立磨喂料提升机连接；所述的立磨上方的选粉机的出风口与旋风筒连接，所述的旋风筒的出料端通过输送设备将物料送入成品库；所述的磨机的出料口通过出磨皮带机与入料提升机连接。
- 根据权利要求1所述的一种生料立磨外循环系统，其特征在于：在选粉筒体的下部设置有进风口，该进风口与V型选粉机出风口以及循环风机出风口连接。
- 根据权利要求1所述的一种生料立磨外循环系统，其特征在于：在所述的分隔板下安装有锁风翻板阀。
- 根据权利要求1所述的一种生料立磨外循环系统，其特征在于：所述的V型选粉机的粗粉料出口通过缓冲仓以及提升机与外循环辊式立磨进料口连接。
- 一种生料立磨外循环工艺，其特征在于，包括以下步骤：(1)、在物料进行配料，配好的料经过提升机送入上部的送料传送机构上；(2)、送料传送机构通过送料三通将配料送入到V型选粉机进行混料的初选；(3)、在V型选粉机中通入热风，将物料打散同时烘干原料中的水分，并进行初选，初选出的较细粉料由风带进如权利要求1中所述的外循环辊式立磨上部选粉机内，然后通过静态导风叶片和动态转笼，将物料分选出满足合格细度要求的成品；初选出的粗粉料送入到外循环辊式立磨下部的磨机内进行研磨；(4)、外循环辊式立磨上部选粉机的出风口排出的含有合格细度要求细粉体，经旋风筒分离后，将收集到的细粉体送入到成品库储存；(5)、外循环辊式立磨下部的磨机将粗粉料研磨后，从磨机出料口出料，经过皮带机送入到入料提升机中，如此循环。
- 根据权利要求5所述的一种生料立磨外循环工艺，其特征在于：步骤(4)中，经旋风筒分离后的气体还需经过除尘器除尘后，将固体收集送入成品库中。
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| CN109174409A (zh) * | 2018-08-31 | 2019-01-11 | 江苏鹏飞集团股份有限公司 | 多级循环加工并且预打散的粉煤灰超细粉磨系统 |
| CN110860343A (zh) * | 2019-11-15 | 2020-03-06 | 南京钜力智能制造技术研究院有限公司 | 一种生料立磨外循环系统及工艺 |
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