CN1302852C - Method and equipment for reducing power consumption of steel ball coal grinder - Google Patents
Method and equipment for reducing power consumption of steel ball coal grinder Download PDFInfo
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- CN1302852C CN1302852C CNB200310116226XA CN200310116226A CN1302852C CN 1302852 C CN1302852 C CN 1302852C CN B200310116226X A CNB200310116226X A CN B200310116226XA CN 200310116226 A CN200310116226 A CN 200310116226A CN 1302852 C CN1302852 C CN 1302852C
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- pond
- buoyancy tank
- low speed
- cylindrical shell
- hollow buoyancy
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Abstract
The present invention discloses a method and equipment for reducing the power consumption of a steel ball coal grinder. A water tank is built, and a hollow float box is placed in the water tank. The outer side of the bottom surface of the hollow float box is provided with a plurality of notches. A horizontal push rod is arranged on the wall of the water tank, and the other end of the horizontal push rod is fixed with the hollow float box. The top of the hollow float box is fixedly provided with a bearing seat of the steel ball coal grinder. A concrete upright post is built in the water tank, and a motor and a speed reducer are arranged on the concrete upright post. By using the method and equipment for reducing the power consumption of a steel ball coal grinder, the motor power can be decreased to about 1/3 of the original power. The present invention adapts to various single-in single-out and double-in double-out low-speed steel ball coal grinders widely used in industry.
Description
Technical field the present invention relates to a kind of method that reduces the low speed coal mill power consumption, and it is adapted to the industrial widely used various low speed low speed coal mills that singly advance singly, go with each other all the time, and the invention still further relates to a kind of facility that reduces the low speed coal mill power consumption.
Background technology in order to obtain the coal dust of powdery, is often used a kind of equipment that is low speed coal mill in industrial processes, the broken coal of bulk is ground the coal dust of powdering.It is the capital equipment that grinds raw material in the industries such as thermal power plant and cement, mine, metallurgy.
The rotating speed of low speed coal mill is generally 16-25r/min, and it mainly is made up of parts such as hopper, bearing assembly, runner assembly, blimp, motor, reductor, rod pin shaft couplings.Runner assembly is named big jar again, is the chief component of coal pulverizer, and it is made up of cylindrical shell and two end caps that steel plate is welded.Tubular journal is arranged on the end cap, and big jar is propped up on base bearing with axle journal; The inner surface of shell portion and end cap is equipped with the liner of being made by wear-resisting steel plate; The inner surface of liner is equipped with ripple lining first, ripple lining first is carved formed transverse pressure and is combined on the cylindrical shell securely by means of fixedly carving and tightening, lining first inner surface is provided with the ripple of rule, when cylindrical shell rotates, be used for promoting steel ball and ground raw material, the assurance steel ball evenly moves regularly and hinders its downslide.The liner plate of end cap is made up of the fan-shaped liner plate of inside and outside two rows, can change respectively when inside and outside two arrange the liner plate uneven wears; Outer end liner first has the reinforcement gusset, and it can bear the impact of steel ball and abrasive material, and hinders their downslide, can reduce the wearing and tearing of lining first simultaneously.For allow liner plate be heated and the impact of steel ball grinding material under free wxpansion, leave certain space between inside and outside two row's liner plates.For sound insulation and thermal insulation, between liner plate and big jar, be equipped with adiabatic asbestos board, and big jar outer surface is surrounded by the backplate of one deck sound insulation; Leak out and leak powder in order to prevent to serve as a contrast the first screw hole, have asbestos cord stifled mutually at the slotted eye place, have manhole on big jar.
Low speed coal mill is by bump principle work, and with grinding and squeezing action.Big jar is dragged by decelerator by motor, steel ball is served as a contrast first and is taken to certain height, falling to clashing into coal cinder along parabola then smashes it, meanwhile steel ball also produces in big jar and rotatablely moves, and at this moment between steel ball and the steel ball, produces the crush and grind effect between steel ball and the lining first, coal cinder is worn into powder, when grinding, generally adopt hot-air as drier, the coal dust that grinds is taken out of from big jar by drier.
Barrel diameter is 3200 millimeters a low speed coal mill, and its weight is about 120 tons, and pack into the maximum weight of steel ball of cylindrical shell is 55 tons, the power consumption of low speed coal mill is very big, with Φ 3200 Ball Mill is example, and its power of motor is 880KW, and the electric weight that moves consumption in one day is 21120KWh.The main cause that the low speed coal mill power consumption is big is that the weight of cylindrical shell is big, and the steel ball amount of loading in the cylindrical shell is between tens to up to a hundred tons, make most energy consumption of low speed coal mill in the process of rotating cylinder and lifting steel ball, and the quality of the coal cinder in the adding cylindrical shell is very little, only account for about 5% of rotating part gross mass, exert oneself almost irrelevant with grinding of low speed coal mill.The open circuit loss of therefore managing to reduce low speed coal mill is the key point that low speed coal mill reduces power consumption.For a long time, reducing the big problem of low speed coal mill power consumption is the target of people's effort always.
Goal of the invention the purpose of this invention is to provide a kind of method and facility that reduces the low speed coal mill power consumption, this method facility, do not change low speed coal mill operation principle, power transmission means, internal structure, grind effect with exert oneself.
A kind of method that reduces the low speed coal mill power consumption may further comprise the steps:
(1) build a pond, the length in pond is greater than the length of cylindrical shell rotating part, and its length does not exceed 1.3 times of this cylindrical shell rotating part length; The width in pond is greater than the diameter of cylindrical shell, and its width does not exceed 1.3 times of this cylindrical shell rotating part diameter; The degree of depth in pond is by the size design of required buoyancy;
(2) make a hollow buoyancy tank, the length of hollow buoyancy tank and width are less than the length and the width in pond, and the height of hollow buoyancy tank is by the size design of required buoyancy; Just the volume of hollow buoyancy tank adds required buoyancy size design after the entry by the pond, makes the hollow buoyancy tank and the ratio of the volume in pond be about 0.4-0.5; The contact-making surface of the outside, the bottom surface of hollow buoyancy tank and tank floor is made into corrugated, makes that the bottom was in wet face state when hollow buoyancy tank was immersed in the pond can produce needed buoyancy;
(3) hollow buoyancy tank is positioned over the pond, the bottom surface of hollow buoyancy tank contacts with tank floor, and horizontal push rod is installed on the pool wall, and the other end of horizontal push rod is fixed hollow buoyancy tank;
(4) bearing block of low speed coal mill is mounted to the top of hollow buoyancy tank, according to a conventional method runner assembly and bearing assembly is mounted to bearing block;
(5) basis of motor and reductor is set on the limit outside the pond; Perhaps in the pond, construct the basis-concrete column of motor and reductor, motor and reductor are installed on the concrete column.
(6) to the pond water filling.
The facility of reduction low speed coal mill power consumption of the present invention, adopt following technical scheme:: a kind of facility that reduces the low speed coal mill power consumption, comprise the gear wheel that installs on the bearing block of low speed coal mill and the cylindrical shell, it is characterized in that: in the pond, place a hollow buoyancy tank, the outside, bottom surface of hollow buoyancy tank is provided with several grooves, horizontal push rod is installed on the pool wall, and the other end of horizontal push rod and hollow buoyancy tank are fixed; The top of hollow buoyancy tank is fixed with the bearing block of low speed coal mill; Constructing concrete column in the pond is installed motor and reductor on the concrete column.
Mentality of designing of the present invention is: utilize " will be subjected to the effect of buoyancy of water when object is immersed in the water; this buoyancy is a size under certain conditions; the constant force that direction is constant " effect, build a pond in the bottom of low speed coal mill, install a buoyancy tank within it additional, prop up the front and back bearings base of low speed coal mill with buoyancy tank, allow the weight of low speed coal mill pass through the antero posterior axis bearing, hollow buoyancy tank, water is delivered to basin bottom (in the concrete foundation), groove floor is made in the outside, bottom surface of hollow buoyancy tank, to guarantee that hollow buoyancy tank water in bottom surface and the pond in the pond keeps wet face state, produces buoyancy upwards.After the pond adds entry, hollow buoyancy tank under the low speed coal mill base will produce a buoyancy that makes progress to ball mill, we allow buoyancy that hollow buoyancy tank the produces gravity less than low speed coal mill, just can make low speed coal mill after being subjected to certain buoyancy, do not produce displacement upwards, position when not adding water still in place in the pond, the buoyancy that this moment, buoyancy tank produced has been offset most low speed coal mill gravity, big jar has lightened when we drag big jar of rotation with motor, load has reduced, we just can substitute original motor with a less motor and decelerator and dragged big jar and rotate and grind powder this moment, reached goal of the invention.
Because low speed coal mill own wt and the big jar of interior quantity of loading steel ball thereof are certain, and jar interior coal amount of filling out only accounts for about 5% of total amount, therefore operating coal pulverizer oeverall quality is a constant substantially amount, also be that rotary inertia is certain, this facilitates the volume that we design hollow buoyancy tank, makes to adopt low speed coal mill of the present invention to move reposefully.
With a barrel diameter is that 3200 millimeters Ball Mill is an example, and promptly Φ 3200 Ball Mill are example, and when not loading steel ball, we design buoyancy that hollow buoyancy tank produces, and to equal low speed coal mill gravity be 120T; Like this, the gross mass gravity to the earth under hollow buoyancy tank effect that is in the low speed coal mill at hollow buoyancy tank top is zero, after having loaded the 55T steel ball, low speed coal mill is 55T to the gravity of the earth, after loading the coal cinder about 5T again, the total force of this moment is about 60T, is 1/3 of original total force.It is original about 1/3 that the motor load of this moment is, and therefore can use 1/3 of motor, reductor rated capacity to change original motor and reductor, realizes the goal of the invention of reduction low speed coal mill power consumption.
Description of drawings
Fig. 1 is the front view of prior art low speed coal mill,
Fig. 2 is the vertical view of Fig. 1,
Fig. 3 is the static distribution figure of steel ball in the cylindrical shell,
Fig. 4 is the DYNAMIC DISTRIBUTION figure of steel ball in the cylindrical shell operation process,
Fig. 5 is that the steel ball track grinds analysis chart in the cylindrical shell operation process,
Fig. 6 is provided with the front view that the present invention reduces the low speed coal mill of low speed coal mill power consumption facility,
Fig. 7 is the vertical view of Fig. 6,
Fig. 8 is the another kind of embodiment that the present invention reduces low speed coal mill power consumption facility.
Among the figure: 1-feed hopper, 2-discharge bucket, 3-bearing block, 4-runner assembly (big jar), the 401-cylindrical shell, 402-end cap, 403-liner, 404-ripple lining first, the 405-steel ball, 406-gear wheel, 407-pinion, 5-blimp, the 6-motor, 7-reductor, 8-rod pin shaft coupling, the 9-pond, the hollow buoyancy tank of 10-, 11-groove, the horizontal push rod of 12-, 13-concrete column, 14-are worn and are heavily taken turns.
The specific embodiment is described further prior art low speed coal mill and the present invention below in conjunction with accompanying drawing.
The structure of prior art low speed coal mill is as depicted in figs. 1 and 2: low speed coal mill is mainly by into and out of hopper 1,2, and parts such as bearing block 3, runner assembly 4, blimp 5, motor 6, reductor 7, rod pin shaft coupling 8 are formed.Runner assembly 4 is named big jar again, and it is the chief component of low speed coal mill, and it is made up of cylindrical shell 401 and two end caps 402 that steel plate is welded.On the end cap 402 tubular journal is arranged, big jar 4 is propped up on base bearing with axle journal; Referring to Fig. 3, the inner surface of cylindrical shell 401 parts and end cap is equipped with the liner of being made by wear-resisting steel plate 403; The inner surface of liner 403 is equipped with ripple lining first 404, ripple lining first 404 is carved formed transverse pressure and is combined in securely on the cylindrical shell 401 by means of fixedly carving and tightening, during use, steel ball 405 is housed in the cylindrical shell 401 and is ground raw material, ripple lining first 404 inner surfaces are provided with the ripple of rule, when cylindrical shell 401 rotates, be used for promoting steel ball 405 and ground raw material, assurance steel ball 405 evenly moves regularly and hinders its downslide; Cylindrical shell 401 surperficial ends are fixed with gear wheel 406, and the power of motor 6 drives cylindrical shell 401 and rotates through decelerator 7 and pinion 407 transmission gear wheel 406.
The steel ball in the cylindrical shell and the distribution situation of coal cinder are: during shutdown because being free to slide of steel ball and coal cinder makes most of steel ball and coal cinder be retained in the cylindrical shell bottom, as shown in Figure 3: from radially seeing center of gravity skew (being partial to the left side during big jar of dextrorotation) is arranged slightly; During the start running, as shown in Figure 4: because the rotation and the castering action of cylindrical shell, steel ball and coal cinder major part concentrate on the cylindrical shell left side; The steel ball track grinds analysis as shown in Figure 5 in the cylindrical shell operation process: the steel ball and the coal cinder that are positioned at I district, II zone position rise under the drive of ripple lining first, coal cinder to I district, II zone position applies the crush and grind effect simultaneously, steel ball in the III zone position falls along parabolic path, to the coal cinder generation effect of impact of III zone position.Is uniformly along drum shaft to the distribution of steel ball, because the draught effect of inner barrel, the arrival end coal cinder is more, and port of export coal dust is more; So is uniform along drum shaft to weight distribution.
Embodiments of the present invention 1
As Fig. 6, shown in Figure 7: the facility that reduces the low speed coal mill power consumption, the bearing block 3 that comprises low speed coal mill, the gear wheel 406 that installs on the cylindrical shell 401, it is characterized in that: build a pond 9, in pond 9, place a hollow buoyancy tank 10, the outside, bottom surface of hollow buoyancy tank 10 is provided with several grooves 11, and horizontal push rod 12 is installed on 9 walls of pond, and the other end of horizontal push rod 12 and hollow buoyancy tank 10 are fixing; The top of hollow buoyancy tank 10 is fixed with the bearing block 3 of low speed coal mill, constructs the basis of motor 6 and reductor 7---concrete column 13 in pond 9, and motor 6 and reductor 7 are installed on the concrete column 13.The mode that motor 6 power outputs are transferred to cylindrical shell 401 does not change, and the structure of low speed coal mill does not change.
The length in pond is greater than the length of cylindrical shell rotating part, and width is greater than big jar diameter, and the degree of depth is calculated by the size of required buoyancy.The length of hollow buoyancy tank and wide length less than the pond and wide are highly calculated by required buoyancy size.The outside, the bottom surface of hollow buoyancy tank is made into corrugated groove with the contact-making surface of tank floor, is in wet face state bottom when buoyancy tank is immersed in the pond like this can produce enough buoyancy, and hollow buoyancy tank volume is about 0.4-0.5 with the ratio in pond.With Φ 3200 Ball Mill is example, 3200 millimeters of cylindrical shell effective diameters, and 5800 millimeters of cylindrical shell rotating part length, as disregard the deadweight of hollow buoyancy tank, the volume of hollow buoyancy tank can be made as:
Long * wide * high 8000 millimeters * 6600 millimeters * 2270 millimeters=120 cubic metres
The volume in pond can be made as:
Long * wide * high 12000 millimeters * 8000 millimeters * 2270 millimeters=217 cubic metres
After adopting the facility of above-mentioned reduction low speed coal mill power consumption, steel ball in the cylindrical shell and coal cinder also are subjected to buoyancy upwards simultaneously, this does not influence the steel ball bump, grind and push the action effect of coal cinder, weaken the ability that grinds of coal pulverizer, still be in Fig. 4, state shown in Figure 5, after cylindrical shell is subjected to buoyancy, steel ball is still at original height, fall from eminence in the parabola mode, kept original effect of impact, I in Fig. 4, though the weight of II zone steel ball has alleviated, because big jar is still with former speed rotation, so steel ball has still kept grinding and squeezing action to coal cinder.And the pond around be equiped with fixedly buoyancy tank of horizontal push rod on the wall, reduced the vibration when low speed coal mill moves.
After adopting the facility of above-mentioned reduction low speed coal mill power consumption, just can transform, make it to reduce power consumption, energy savings the low speed coal mill of the present widely used form of singly advancing singly, go with each other all the time.
With Φ 3200 Ball Mill is example, because the big jar of weight to the earth only is to load the weight of steel ball and coal cinder in the cylindrical shell.Gross weight to the earth reduces to 60T by 180T, before load is reduced to and does not transform 1/3rd, power of motor can be reduced to about 300KW by 880KW, reduce power output 580KW, approximately save electric weight 14000 (580 * 24) KWh every day, as by 0.5 yuan of calculating of every KWh electricity price, then save 7000 yuan of electricity prices every day.4 Φ 3200 Ball Mill generally need be installed in the medium-sized thermal power plant of one 200,000 KW, save 28000 yuan of electricity prices every day.
As of the present invention perfect, gear wheel 406 is installed in the middle part of cylindrical shell 401, the position that is about to gear wheel 406 is moved to the middle part (referring to Fig. 6, Fig. 7) of cylindrical shell 401 by the rear portion (referring to Fig. 1 prior art low speed coal mill) of cylindrical shell 401, thereby, make hollow buoyancy tank 10 at cylindrical shell 401 axial suffered gravity self-consistentencies, make the bearing block 3 suffered dead weights at cylindrical shell 401 two ends even; In like manner, motor 6 moves forward with gear wheel 406 with reductor 7 positions.
Embodiments of the present invention 2
As shown in Figure 8: the fabrication and installation mode of pond and hollow buoyancy tank is with embodiment 1 in this programme.This embodiment is the feed inlet end at cylindrical shell 401, and pendant of suit heavily takes turns 14, wears and heavily to take turns dead weight poor that 14 weight is two end axles bearing 3, makes the dead weight unanimity of two end axles bearing 3; The buoyancy of hollow buoyancy tank 10 is designed to cylindrical shell 401 and has installed additional to wear and heavily take turns total force after 14.
When not loading steel ball and coal cinder, low speed coal mill is zero to the gravity of the earth, behind filling steel ball and the coal cinder, low speed coal mill only is the gravity of steel ball and coal cinder to the gravity of the earth, therefore before promptly transforming about 1/3rd, can be reduced to motor power (output) original 1/3rd.
Claims (4)
1, a kind of method that reduces the low speed coal mill power consumption may further comprise the steps:
(1) build a pond, the length in pond is greater than the length of cylindrical shell rotating part, and its length does not exceed 1.3 times of this cylindrical shell rotating part length; The width in pond is greater than the diameter of cylindrical shell, and its width does not exceed 1.3 times of this cylindrical shell rotating part diameter; The degree of depth in pond is by the size design of required buoyancy;
(2) make a hollow buoyancy tank, the length of hollow buoyancy tank and width are less than the length and the width in pond, and the height of hollow buoyancy tank is by the size design of required buoyancy; Just the volume of hollow buoyancy tank adds required buoyancy size design after the entry by the pond, makes the hollow buoyancy tank and the ratio of the volume in pond be about 0.4-0.5; The contact-making surface of the outside, the bottom surface of hollow buoyancy tank and tank floor is made into corrugated, makes that the bottom was in wet face state when hollow buoyancy tank was immersed in the pond can produce needed buoyancy;
(3) hollow buoyancy tank is positioned over the pond, the bottom surface of hollow buoyancy tank contacts with tank floor, and horizontal push rod is installed on the pool wall, and the other end of horizontal push rod is fixed hollow buoyancy tank;
(4) bearing block of low speed coal mill is mounted to the top of hollow buoyancy tank, according to a conventional method will runner assembly and the bearing assembly assembling after be mounted to bearing block;
(5) basis of motor and reductor is set on the limit outside the pond; Perhaps in the pond, construct basis---the concrete column of motor and reductor, motor and reductor are installed on the concrete column.
(6) to the pond water filling.
2, a kind of facility that reduces the low speed coal mill power consumption, the bearing block that comprises low speed coal mill, the gear wheel (406) that installs on the cylindrical shell (401), it is characterized in that: in pond (9), place a hollow buoyancy tank (10), the outside, bottom surface of hollow buoyancy tank (10) is provided with several grooves (11), horizontal push rod (12) is installed on the pond (9), and the other end of horizontal push rod (12) and hollow buoyancy tank (10) are fixing; The top of hollow buoyancy tank (10) is fixed with the bearing block (3) of low speed coal mill, and constructing concrete column (13) in pond (9), concrete column (13) are gone up motor (6) and reductor (7) are installed.
3, a kind of facility that reduces the low speed coal mill power consumption according to claim 2, it is characterized in that: described gear wheel (406) is installed in the middle part of cylindrical shell (401).
4, a kind of facility that reduces the low speed coal mill power consumption according to claim 2 is characterized in that: the feed inlet end of described cylindrical shell (401) is set with a pendant and heavily takes turns (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200310116226XA CN1302852C (en) | 2003-11-12 | 2003-11-12 | Method and equipment for reducing power consumption of steel ball coal grinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200310116226XA CN1302852C (en) | 2003-11-12 | 2003-11-12 | Method and equipment for reducing power consumption of steel ball coal grinder |
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| Publication Number | Publication Date |
|---|---|
| CN1616152A CN1616152A (en) | 2005-05-18 |
| CN1302852C true CN1302852C (en) | 2007-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200310116226XA Expired - Fee Related CN1302852C (en) | 2003-11-12 | 2003-11-12 | Method and equipment for reducing power consumption of steel ball coal grinder |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4121776A (en) * | 1976-07-20 | 1978-10-24 | Carlos Oliver Pujol | Cooled horizontal-axle grinder |
| US5167375A (en) * | 1988-04-04 | 1992-12-01 | Datta Rabinder S | Apparatus for mineral matter separation |
| CN2654213Y (en) * | 2003-11-12 | 2004-11-10 | 潘卫亚 | Installation for reducing powder consumption of steel ball coal grinder |
-
2003
- 2003-11-12 CN CNB200310116226XA patent/CN1302852C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4121776A (en) * | 1976-07-20 | 1978-10-24 | Carlos Oliver Pujol | Cooled horizontal-axle grinder |
| US5167375A (en) * | 1988-04-04 | 1992-12-01 | Datta Rabinder S | Apparatus for mineral matter separation |
| CN2654213Y (en) * | 2003-11-12 | 2004-11-10 | 潘卫亚 | Installation for reducing powder consumption of steel ball coal grinder |
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| Publication number | Publication date |
|---|---|
| CN1616152A (en) | 2005-05-18 |
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