CN2180328Y

CN2180328Y - Drying grinder

Info

Publication number: CN2180328Y
Application number: CN 94227056
Authority: CN
Inventors: 李雄飞
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-01-15
Filing date: 1994-01-15
Publication date: 1994-10-26
Anticipated expiration: 2004-01-15

Abstract

The utility model relates to a drying grinder, comprising a barrel body, a partition plate dividing the barrel body into a bin 1 and a bin 2, a trapezoidal lining plate and a wave-shaped lining plate which are respectively installed on barrel body walls inside the bin 1 and the bin 2, a feeding tube and a front hollow shaft which are installed on the head end of the bin 1, a feeding screw inside the front hollow shaft, a back hollow shaft installed on the tail end of the bin 2 and a discharge screw inside the back hollow shaft. The utility model is characterized in that a material seal type turnover plate valve is arranged in the feeding tube, a hot air tube is communicated between the valve and the front hollow shaft, and heat insulating material layers are respectively filled between the front hollow shaft and the feeding screw and between the back hollow shaft and the discharge screw. The bin 1 can also be lengthened, the trapezoidal lining plate is inversely arranged, etc.

Description

Drying grinder

The utility model relates to a kind of grinding device of wet stock, and particularly a kind of oven dry flour mill is applicable to that containing of dry production, comprehensive moisture content was lower than the grinding of 5% cement slurry, also the cement grinding when high applicable to composite material moisture content.

Existing common raw mill can only be lower than 2% material by the comprehensive moisture content of grinding, when the comprehensive moisture content of mill feed material is higher than 2%, steam gathers in the mill, make fine powder moistening, sticky on abrasive body, liner plate, partition panel and input and output material spiral, form full mill, grinding process is interrupted, normal mill grinding wet stock yields poorly, and fineness is inhomogeneous, coarse grain is many, and is of poor quality; In order to address these problems, the grinding machine in drying storehouse has appearred, and it is to set up the oven dry storehouse in grinding machine charging side, oven dry is not adorned abrasive body in the storehouse, only adorn material plate, make material enter the grinding storehouse again after the oven dry of oven dry storehouse, this technology makes wet feed stick with paste mill and is to a certain degree solved, but because the oven dry storehouse is short, material grain piece in the oven dry storehouse is thick, stops weak point, and drying effect is not obvious, simultaneously, the oven dry storehouse occupies the grinding machine volume, and the grinding dischargeable capacity is dwindled, and the mill output of same specification obviously reduces, power consumption raises, the oven dry storehouse is different with grinding storehouse function, running life difference, maintenance capacity increase, running rate reduces, poor practicability.

The purpose of the utility model is intended to overcome above-mentioned deficiency of the prior art, by the improvement to normal mill, provides a kind of and can directly comprehensive moisture content be lower than 5% material and go into mill and finish the hold concurrently oven dry flour mill of grinding of oven dry simultaneously.

Content of the present utility model is: a kind of oven dry flour mill comprises: trunk, the partition panel that is combined into by one group of fan-shaped compartment piece in vivo is installed, and this partition panel is divided into storehouse 1 and storehouse 2 with trunk; On the trunk inwall in storehouse 1 trapezoidal liner plate is installed, on the trunk inwall in storehouse 2 the waveform liner plate is installed; The head end in storehouse 1 is equipped with preceding quill shaft, is connected with feed auger in the preceding quill shaft, and preceding quill shaft one end is connected with feed pipe, and preceding quill shaft is supported by front main bearing; The tail end in storehouse 2 is equipped with the back quill shaft, is connected with the discharging spiral in the back quill shaft, and back quill shaft is supported by rear min bearing, and its feature part is:

A, described before between quill shaft (7) and the feed auger (8), afterwards be filled with insulation material layer (17) respectively between quill shaft (13) and the discharging spiral (14);

Material envelope formula flap valve (12) is housed in b, the feed pipe (10);

Be communicated with warm-air pipe (11) on the feed pipe (10) between c, material envelope formula flap valve (12) and the preceding quill shaft (7), cold wind control valve (18) and Thermal Meter (19) are installed on the warm-air pipe (11).

In the utility model content, the installation direction of described trapezoidal liner plate (4) is thick from being as thin as along the direction of rotation of trunk (3).

In the utility model content, described fan-shaped compartment piece (16) is spaced, and connects spaced steel bar (6) between two fan-shaped compartment pieces (16).

In the utility model content, described storehouse 1 is 1:1～1.5 with the axial length ratio in storehouse 2, can specifically determine according to mill feed material size and moisture content.

Compared with prior art, the utlity model has following characteristics:

(1) be communicated with warm-air pipe 11 on the feed pipe 10, hot blast enters and grinds interior material with going into mill and heating after wet stock mixes, and the water evaporates in the material is also discharged with hot blast; Flap valve 12 is set on the feed pipe 11 forms diplegs, can avoid hot blast to spill or cold wind enters, make that temperature remains in the suitable certain limit in the mill; Make the utility model be lower than 5% wet stock by the direct comprehensive moisture content of grinding, go out grind materials moisture content and be lower than 1%, mill output improves 10%, fineness qualification rate 100%, and composition and grade are even, and the raw material air stirs, and effectively prevents to stick with paste the storehouse, sticks with paste ball and full mill; The cement plant of dry production no longer is equipped with the raw material stoving machine, can annual ordinary production;

(2) for example distinguish filling heat insulator layer 17(between forward and backward quill shaft and the charging and discharging spiral: the alumina silicate fibre layer of 5～10 millimeters thick etc.), isolated thermal source prevents that quill shaft from heating up, and guarantees base bearing safety operate as normal; For strengthening effect of heat insulation, also cooling water flow can be increased to 1～2 times of normal discharge, strengthen cooling oil sump and lubricants capacity;

(3) trapezoidal liner plate 4 installation directions are thick from being as thin as along the direction of rotation of trunk 3, and anti-dress of promptly trapezoidal liner plate can be improved its dribbling band material ability, strengthens material with hot blast 1 heat exchange in the storehouse, improves the oven dry mill efficiency, overcomes and sticks with paste mill;

(4) fan-shaped compartment piece 16 is spaced (the compartment number of blocks than prior art reduces 1～3), and the interval connects steel bar 6 between two compartment pieces 16, storehouse 1 is designed to 1:1～1.5 with the axial length ratio in storehouse 2, that is: compared with the prior art, move behind the partition panel, storehouse 1 lengthening strengthens between the compartment piece 16 at interval, can guarantee that material smoothness, air-flow are unobstructed;

(5) simple in structure, adaptability is strong, can on the common raw mill of all size, implement to transform, and the small investment of transformation, the duration is short, and instant effect effectively overcomes the weakness that existing oven dry is ground, and it is low to transform the back power consumption, and the running rate height is easy to maintenance, dependable performance.

Fig. 1 is the utility model structural representation;

Fig. 2 is partition panel 5 structural representations among Fig. 1;

Fig. 3 is the utility model example structure schematic diagram.

Among the figure: 1-storehouse, 2-storehouse, 3-trunk, the trapezoidal liner plate of 4-, 5-partition panel, quill shaft before the 6-steel bar, 7-, 8-feed auger, 9-front main bearing, the 10-feed pipe, 11-warm-air pipe, 12-material envelope valve, quill shaft behind the 13-, 14-discharging spiral, 15-rear min bearing, 16-compartment piece, 17-insulation material layer, 18-cold wind control valve, 19-Thermal Meter, 20-air blast, 21-coal supply apparatus, the 22-combustion chamber, 23-discharge nozzle, 24-electricity dust arrester installation, 25-exhaust blower.

The utility model is described in further detail below by embodiment:

With 1.83 * 7 meters raw mills of φ is example, referring to Fig. 1～3.This grinding machine by the high-efficient hot air furnace that is positioned at the machine front end is partly dried flour mill, is positioned at discharge nozzle 23, electric dust arrester installation 24 and the exhaust blower 25 of machine rear end, formations such as power and driving section.

Described high-efficient hot air furnace partly comprises: air blast 20, coal supply apparatus 21, warm-air pipe 11 are equipped with cold wind control valve 18 and Thermal Meter 19 on combustion chamber 22, the warm-air pipe 11; When mill feed material moisture content reaches 3～5%, can select GXL-400 type high-efficient hot air furnace for use, adopting power is the small-sized cfentrifugal blower of 1～2KW, pipeline wind send and adds coal dust, the dischargeable capacity of combustion chamber is 2.5～3.5 cubic metres, warm-air pipe is 400 millimeters of φ, cold wind control valve flap valve, and Thermal Meter uses 0～800 ℃ of thermocouple of low form.

Described oven dry flour mill comprises: trunk 3, be installed in the partition panel 5 that is combined into by one group of fan-shaped compartment piece 16 in the trunk 3, compartment piece 16 lacks two than prior art, center of gravity is even, compartment piece 16 is spaced, weld the round bar 6 of 30 millimeters of two φ between the two compartment pieces 16 at interval, making the punishment in advance pore width is 10～15 millimeters; Partition panel 5 is divided into storehouse 1 and storehouse 2 with trunk, and the axial length in storehouse 1 is 3.3 meters; On trunk 3 inwalls in storehouse 2 the waveform liner plate is installed, on trunk 3 inwalls in storehouse 1 trapezoidal liner plate 4 is installed, the installation direction of trapezoidal liner plate 4 is thick from being as thin as along the direction of rotation of trunk 3, and is opposite with prior art; The head end in storehouse 1 is equipped with preceding quill shaft 7, be connected with feed auger 8 in the preceding quill shaft 7, preceding quill shaft 7 is supported by front main bearing 9, preceding quill shaft 7 one ends are connected with feed pipe 10, material envelope formula flap valve 12 is housed in the feed pipe 10 forms diplegs, be communicated with warm-air pipe 11 on the feed pipe 10 between material envelope formula flap valve 12 and the preceding quill shaft 7; The tail end in storehouse 2 is equipped with back quill shaft 13, is connected with discharging spiral 14 in the back quill shaft 13, and back quill shaft 13 is supported by rear min bearing 15; Before between quill shaft 7 and the feed auger 8, afterwards the interlayer between quill shaft 13 and the discharging spiral 14 is filled with insulation material layer 17 respectively, the i.e. aluminosilicate fiber cotton of 5～10 millimeters thick, with isolated thermal source, prevent that quill shaft from heating up, and can strengthen cooling oil sump and cooling water internal circulating load;

Described electric dust arrester installation 24 connects with the machine rear end through discharge nozzle 23, electricity dust arrester installation 24 is equipped with the anti-condensation of infrared lamp irradiation source, exhaust blower 25 adopts centrifugal fan, volume damper is housed, air quantity is 50～80 cubic metres/minute, adapt with institute's required airflow in the mill, exhaust duct is coated with thermal insulation coatings outward;

During work, coal supply apparatus 21 is gone into combustion chamber 22 by the wind-force powder of delivering coal, send into an amount of 600～800 ℃ of high temperature hot gas of the combustion-supporting generation down of fresh air at air blast 20, reach 350～450 ℃ through warm-air pipe 11 wind-warm syndrome after cold wind control valve 18 is sneaked into the cold wind adjusting, air quantity reaches 30～50 cubic metres/minute, go into to grind wind-warm syndrome and monitor automatically, drive valve 18 automatic temperature-controls by Thermal Meter 19;

Hot blast is gone into mill after mixing with wet stock in feed pipe 10, go into to grind wet stock and enter storehouse 1, under the stairstepping liner plate 4 of anti-dress drives, roll and leave, wet stock is simultaneously by the double grinding of oven dry, levigate material passes partition panel 5 and enters storehouse 2 continuation grindings, go out mill after fineness is qualified and import raw material silo, the moisture content in the wet feed is heated back evaporation formation steam and sneaks in the interior waste gas of mill, and waste gas enters atmosphere after gathering dust under 25 suctions of mill tail exhaust blower.

Because drying efficiency height, the comprehensive moisture content of mill feed material reaches at 3～5% o'clock, can not produce and stick with paste mill, the mill condition is very normal, and complete wear is carried out the double oven dry of grinding simultaneously, the grinding dischargeable capacity is big, efficient height, raw material output reach 12～15 tons/hour usually, power consumption 15～20 degree/tons, working stability, running rate obviously improves.

The utility model is not limited to this embodiment, and the utility model content is described all can be implemented.

Claims

1, a kind of oven dry flour mill comprises: trunk, be installed in the partition panel that is combined into by one group of fan-shaped compartment piece in the trunk, and this partition panel is divided into storehouse 1 and storehouse 2 with trunk; On the trunk inwall in storehouse 1 trapezoidal liner plate is installed, on the trunk inwall in storehouse 2 the waveform liner plate is installed; The head end in storehouse 1 is equipped with preceding quill shaft, is connected with feed auger in the preceding quill shaft, and preceding quill shaft one end is connected with feed pipe, and preceding quill shaft is supported by front main bearing; The tail end in storehouse 2 is equipped with the back quill shaft, is connected with the discharging spiral in the back quill shaft, and back quill shaft is supported by rear min bearing, it is characterized in that:

Between a, preceding quill shaft (7) and the feed auger (8), be filled with insulation material layer (17) respectively between back quill shaft (13) and the discharging spiral (14);

Material envelope formula flap valve (12) is housed in b, the feed pipe (10);

2, by the described oven dry flour mill of claim 1, it is characterized in that: the installation direction of described trapezoidal liner plate (4) is thick from being as thin as along the direction of rotation of trunk (3).

3, by claim 1 or 2 described oven dry flour mills, it is characterized in that: described fan-shaped compartment piece (16) is spaced, and connects spaced steel bar (6) between two fan-shaped compartment pieces (16).

4, by claim 1 or 2 described oven dry flour mills, it is characterized in that: storehouse 1 is 1:1～1.5 with the axial length ratio in storehouse 2.

5, by the described oven dry flour mill of claim 3, it is characterized in that: storehouse 1 is 1:1～1.5 with the axial length ratio in storehouse 2.