Heat recovery type vertical mill with pre-drying structure

Abstract

The utility model discloses a heat recovery type vertical mill with a pre-drying structure, which comprises a vertical mill main body, a feeding channel is mounted on one side of the vertical mill main body, and a material pre-drying device is mounted on the top side of the feeding channel through a bolt. By installing the material pre-drying device, materials entering the vertical mill can be pre-dried, the arranged rotating rods are driven by the motor to rotate, the L-shaped pipes on the periphery are made to rotate, the materials can be turned over, hot air entering through the connecting pipes can be sprayed out from the nozzles, then the materials can be turned over and dried, and the drying efficiency is improved. According to the material drying device, the material drying effect is improved, an arranged scraping plate can rotate while turning, materials adhering to the inner wall of the drying barrel can be scraped away, in addition, a heating wire is arranged in a cavity in the inner wall of the drying barrel, the drying barrel is heated evenly, and the materials further have a good drying environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vertical mill technical field, concretely is a kind of heat recovery type vertical mill with pre-drying structure. BACKGROUND

[0002] The heat recovery type vertical mill is a kind of grinding equipment integrating fine crushing, drying, grinding, powder selection and conveying, which is widely used in the grinding and superfine grinding of various solid materials in cement, building materials, power, metallurgy, chemical industry and non-metallic mineral industries. After the material is dried by hot air, the moisture content is reduced, thereby improving the brittleness of slag and making it easier to be ground into fine powder.

[0003] The prior art discloses a raw material drying device of a vertical mill, which comprises a bottom plate, a box body and a vertical plate. Two supporting legs are arranged on the both sides of the bottom end of the bottom plate, and the top end of the bottom plate is provided with the box body. A discharge port is arranged at the middle position of the bottom end of the box body, and the bottom end of the discharge port extends to the bottom of the bottom plate. An air outlet is arranged at the middle position of the top end of the box body, and the bottom end of the air outlet extends to the top end of the inside of the box body. Heating boxes are arranged on the both sides of the box body, and air inlets are arranged at the middle positions of the bottom ends of the heating boxes. Two heating plates are arranged between the inner walls of the both sides of the heating boxes, and fans are arranged above the heating plates in the heating boxes.

[0004] The heating structure of the above technical solution is installed above the device, and the hot air needs to spread gradually to reach the stirring cavity for drying. The temperature of the hot air may decrease a little, and the air outlet is arranged above the device, which further causes the loss and cooling of the hot air, reducing the drying effect. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a heat recovery type vertical mill with pre-drying structure to solve the problems in the above background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a heat recovery type vertical mill with pre-drying structure, comprising a vertical mill main body, a feeding channel is installed on one side of the vertical mill main body, and a material pre-drying device is bolted on the top side of the feeding channel.

[0007] The material pre-drying device comprises a drying cylinder, a turnover drying assembly is rotatably arranged in the drying cylinder, a recovery assembly is fixedly arranged on the top side of the drying cylinder, the turnover drying assembly further comprises a fixed plate, the fixed plate is arranged on the upper inner wall of the drying cylinder, a rotating rod is rotatably connected to the middle of the fixed plate through a bearing, the rotating rod is hollow at the top, a connecting pipe is arranged on the top side of the rotating rod through a bearing, a valve is arranged in the middle of the connecting pipe, L-shaped pipes are arranged around the top of the rotating rod below the fixed plate, and nozzles are arranged on the outer surfaces of the L-shaped pipes.

[0008] In the above technical solution, the rotating rod rotates under the driving of the motor, so that the L-shaped pipes around it rotate, which can not only turn over the material, but also spray hot air from the nozzles through the connecting pipe, thereby drying the material while turning it over, improving the drying effect of the material.

[0009] As a further preferred embodiment of the present technical solution, the top side of the drying cylinder is fixedly connected with an annular support, one side of the annular support is fixedly connected with a feeding end, the bottom side of the drying cylinder is fixedly connected with a discharging pipe, a valve is arranged on the discharging pipe, heating wires are arranged in the cavity of the inner wall of the drying cylinder, and the heating wires are electrically connected with an external power supply.

[0010] In the above technical solution, the heating wires are arranged to heat the drying cylinder uniformly, further providing a good drying environment for the material.

[0011] As a further preferred embodiment of the present technical solution, a scraper is arranged on the outer wall below the rotating rod, and the scraper is in contact with the inner wall of the drying cylinder.

[0012] In the above technical solution, the scraper is arranged to rotate while turning over, and can scrape off the material adhering to the inner wall of the drying cylinder.

[0013] As a further preferred embodiment of the present technical solution, a driven gear is sleeved on the top of the rotating rod, a driving gear is meshingly connected to one side of the driven gear, a motor is arranged in the middle of the driving gear and extends to the bearing on the fixed plate.

[0014] As a further preferred embodiment of the present technical solution, the recovery assembly comprises a heating cylinder, support plates are fixedly connected to the bottom of the inside of the heating cylinder, and serpentine pipes are arranged on the support plates, one end of the serpentine pipes is connected with the hot air generated by the vertical mill generator set through a pipeline.

[0015] In the above technical solution, the hot air generated by the vertical mill generator set is drawn into the serpentine pipes, and the air suction machine blows air into the serpentine pipes, forming reusable hot air, which can be sprayed from the nozzles through the connecting pipes for drying the material, and the heat generated by the vertical mill can be recycled and reused.

[0016] As a further preferred of the technical solution, the hollow cylinder is internally installed with an air suction fan, and the top side of the hollow cylinder is bolted with a filter plate.

[0017] In the above technical solution, the filter plate is arranged to avoid foreign matters from entering the inner cavity.

[0018] As a further preferred of the technical solution, a recovery pipe is arranged between the drying cylinder and the heating cylinder, and a pump body is arranged on the recovery pipe.

[0019] In the above technical solution, after the drying is completed, the residual heat is returned to the heating cylinder through the recovery pipe by the pump body for reuse in the next drying.

[0020] The utility model provides a kind of heat recovery type vertical mill with pre-drying structure, with the following beneficial effects:

[0021] (1) the utility model discloses a material pre-drying device is installed, the material entering vertical mill can be pre-dried, the rotating rod of its setting is rotated under the drive of motor, so that the L-shaped pipe of four around rotates, not only can the material be turned over, but also the hot gas entering from the connecting pipe can be sprayed from nozzle, to further be able to turn over and dry, improve the effect of material drying, the scraper of setting can be rotated while turning over, can scrape the material adhered on the inner wall of drying cylinder, additionally set heating wire in the cavity of drying cylinder inner wall, so that drying cylinder is evenly heated, further make material have better drying environment.

[0022] (2) the utility model discloses a recovery assembly is arranged, the hot air generated by vertical mill engine group can be sucked into serpentine pipe, and the hot air is blown to serpentine pipe by air suction fan, to form reusable hot air, the hot air can be sprayed from nozzle through connecting pipe to dry material, to further be able to recycle the heat generated by vertical mill, additionally, after drying is completed, material is made into material inlet channel by the valve on discharge pipe, simultaneously, residual heat can be returned to heating cylinder inside by recovery pipe by pump body for reuse. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the overall structure schematic view of the utility model;

[0024] Figure 2 It is the structure schematic view of the material pre-drying device of the utility model;

[0025] Figure 3 It is the sectional view of the material pre-drying device of the utility model;

[0026] Figure 4 It is the enlarged view of A of the utility model;

[0027] Figure 5 It is structure schematic view of the present application;

[0028] In the figure: 1, vertical mill main body; 2, feed channel; 3, material pre-drying device; 31, drying cylinder; 311, annular support; 312, feed end; 313, discharge pipe; 314, heating wire; 32, turnover drying assembly; 321, fixed plate; 322, rotating rod; 323, driven gear; 324, driving gear; 325, motor; 326, connecting pipe; 327, L-shaped pipe; 328, nozzle; 329, scraper; 33, recovery assembly; 331, heating cylinder; 332, support plate; 333, coiled pipe; 334, hollow cylinder; 335, air suction fan; 336, filter plate; 34, recovery pipe; 35, pump body. DETAILED DESCRIPTION

[0029] 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.

[0030] The present application provides a technical scheme: as Figure 1 and Figure 2 shown, in the present embodiment, a heat recovery type vertical mill with a pre-drying structure, comprising a vertical mill main body 1, the vertical mill main body 1 one side is installed with feed channel 2, feed channel 2 top side bolted installation has material pre-drying device 3, drying cylinder 31 top side fixedly connected with annular support 311, annular support 311 one side fixedly connected with feed end 312, drying cylinder 31 bottom side fixedly connected with discharge pipe 313, discharge pipe 313 is provided with valve, drying cylinder 31 inner wall cavity is provided with heating wire 314, heating wire 314 and external power supply electrically connected.

[0031] as Figure 4 and Figure 5As shown, the material pre-drying device 3 includes a drying cylinder 31, a turnover drying assembly 32 is rotatably installed inside the drying cylinder 31, a recovery assembly 33 is fixedly installed on the top side of the drying cylinder 31, the turnover drying assembly 32 further includes a fixed plate 321, the fixed plate 321 is arranged on the upper inner wall of the drying cylinder 31, a rotating rod 322 is rotatably connected in the middle of the fixed plate 321 through a bearing, the rotating rod 322 is in a hollow state at the top, a connecting pipe 326 is arranged on the top side of the rotating rod 322 through a bearing, a valve is arranged in the middle of the connecting pipe 326, L-shaped pipes 327 are arranged around the upper side of the rotating rod 322 below the fixed plate 321, nozzles 328 are arranged on the outer surfaces of the L-shaped pipes 327, a scraper 329 is arranged on the outer wall below the rotating rod 322, the scraper 329 is in contact with the inner wall of the drying cylinder 31, a driven gear 323 is sleeved on the upper side of the rotating rod 322, a driving gear 324 is meshingly connected on one side of the driven gear 323, a motor 325 is installed in the middle of the driving gear 324 and extends to the fixed plate 321 and is connected with the bearing, the material pre-drying device 3 is installed, which can pre-dry the material entering the vertical mill, the rotating rod 322 arranged therein rotates under the driving of the motor 325, so that the L-shaped pipes 327 around it rotate, which can not only turn over the material, but also blow out the hot air entering through the connecting pipe 326 from the nozzles 328, thereby achieving turnover and drying at the same time, improving the drying effect of the material, the scraper 329 arranged therein can rotate while turning over, which can scrape off the material adhering to the inner wall of the drying cylinder 31, and heating wires 314 are arranged in the cavity of the inner wall of the drying cylinder 31, so that the drying cylinder 31 is evenly heated, further providing a good drying environment for the material.

[0032] As shown, Figure 3 The recovery assembly 33 includes a heating cylinder 331, support plates 332 are fixedly connected at both ends of the bottom side of the heating cylinder 331, serpentine pipes 333 are arranged on the support plates 332, one end of the serpentine pipes 333 is connected with the hot air generated by the vertical mill generator set through a pipeline, a hollow cylinder 334 is fixedly connected on the top side of the heating cylinder 331, a suction fan 335 is installed in the hollow cylinder 334, a filter plate 336 is bolted on the top side of the hollow cylinder 334, a recovery pipe 34 is arranged between the drying cylinder 31 and the upper side of the heating cylinder 331, a pump body 35 is installed on the recovery pipe 34, by arranging the recovery assembly 33, the hot air generated by the vertical mill engine set can be sucked into the serpentine pipes 333, and the suction fan 335 blows the hot air into the serpentine pipes 333, forming reusable hot air, the hot air can be blown out from the nozzles 328 through the connecting pipe 326 for material drying, thereby recycling the heat generated by the vertical mill, and after drying is completed, the material can enter the feeding channel 2 through the valve on the discharge pipe 313, and the residual heat can be returned to the inside of the heating cylinder 31 through the recovery pipe 34 for reuse by the pump body 35.

[0033] The utility model provides a kind of heat recovery type vertical mill with pre-drying structure, specific working principle is as follows: by feeding end 312, material is injected into drying cylinder 31, simultaneously, motor 325 is started to drive gear set rotation, driving rotating rod 322 rotation, further make L-shaped pipe 327 rotation and overturn material, simultaneously, the hot air generated by vertical mill engine group is drawn into serpentine pipe 333, suction fan 335 is started to blow outside air to serpentine pipe 333, form hot air, enter the cavity above rotating rod 322 by connecting pipe 326, until from nozzle 328, and heating wire is arranged in the cavity in the inner wall of drying cylinder 31, so that material can be overturned and dried simultaneously;After drying, open the valve on discharge pipe 313, so that material enters feeding passage 2, simultaneously, pump body 35 is started to make waste heat pass through recovery pipe 34 and return to heating cylinder 331, and suction fan 335 is closed at this time, gas with waste heat is stored in heating cylinder 331, when it is needed to dry again, open the valve on connecting pipe 326 to make hot air flow out, and suction fan 335 can be opened again to blow air to serpentine pipe 333 for drying again in a while.

[0034] Although the embodiments of the utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A heat recovery type vertical mill having a pre-drying structure, comprising a vertical mill main body (1), characterized in that: The side of the vertical mill body (1) is provided with a feeding channel (2), and the top side of the feeding channel (2) is bolted with a material pre-drying device (3); The material pre-drying device (3) comprises a drying cylinder (31), a turnover drying assembly (32) is rotatably arranged in the drying cylinder (31), a recovery assembly (33) is fixedly arranged on the top side of the drying cylinder (31), the turnover drying assembly (32) further comprises a fixed plate (321), the fixed plate (321) is arranged on the inner wall above the drying cylinder (31), a rotating rod (322) is rotatably connected to the middle part of the fixed plate (321) through a bearing, the rotating rod (322) is in a hollow state above, a connecting pipe (326) is arranged on the top side of the rotating rod (322) through a bearing, a valve is arranged in the middle part of the connecting pipe (326), L-shaped pipes (327) are arranged around the upper part of the rotating rod (322) and below the fixed plate (321), and nozzles (328) are arranged on the outer surfaces of the L-shaped pipes (327).

2. A heat recovery type vertical mill having a pre-drying structure according to claim 1, characterized in that: The top side of the drying cylinder (31) is fixedly connected with an annular support (311), one side of the annular support (311) is fixedly connected with a feeding end (312), the bottom side of the drying cylinder (31) is fixedly connected with a discharging pipe (313), a valve is arranged on the discharging pipe (313), heating wires (314) are arranged in the cavity of the inner wall of the drying cylinder (31), and the heating wires (314) are electrically connected with an external power supply.

3. The heat recovery type vertical mill having a pre-drying structure according to claim 1, characterized in that: A scraper (329) is arranged on the outer wall below the rotating rod (322), and the scraper (329) is in contact with the inner wall of the drying cylinder (31).

4. The heat recovery type vertical mill having a pre-drying structure according to claim 1, characterized in that: A driven gear (323) is sleeved on the upper part of the rotating rod (322), one side of the driven gear (323) is meshed with a driving gear (324), the middle part of the driving gear (324) is provided with a motor (325), and the motor (325) extends to the bearing on the fixed plate (321).

5. The heat recovery type vertical mill having a pre-drying structure according to claim 1, characterized in that: The recovery assembly (33) comprises a heating cylinder (331), support plates (332) are fixedly connected to the two ends of the bottom side of the heating cylinder (331), and serpentine pipes (333) are arranged on the support plates (332); one end of the serpentine pipes (333) is connected with hot air generated by a vertical mill generator set through a pipeline.

6. A heat recovery type vertical mill having a pre-drying structure according to claim 5, characterized in that: A hollow cylinder (334) is fixedly connected to the top side of the heating cylinder (331), a suction fan (335) is arranged in the hollow cylinder (334), and a filter plate (336) is bolted to the top side of the hollow cylinder (334).

7. The heat recovery type vertical mill having a pre-drying structure according to claim 1, characterized in that: A recovery pipe (34) is arranged between the drying cylinder (31) and the heating cylinder (331), and a pump body (35) is arranged on the recovery pipe (34).

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