CN217774236U - Coal screening and breaking device - Google Patents
Coal screening and breaking device Download PDFInfo
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- CN217774236U CN217774236U CN202221318485.5U CN202221318485U CN217774236U CN 217774236 U CN217774236 U CN 217774236U CN 202221318485 U CN202221318485 U CN 202221318485U CN 217774236 U CN217774236 U CN 217774236U
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Abstract
The utility model discloses a screening coal breaking device, which comprises a coal breaker; the rotary screen is obliquely arranged in front of a feed port of the coal breaker, an opening at the upper end of the rotary screen is communicated with the feed hopper, an opening at the lower end of the rotary screen extends into the coal breaker through the discharge hopper, and a first discharge hopper is arranged below the rotary screen; the first conveying belt is arranged right below a lower port of the first discharging hopper; the shell is communicated with an external dust removal collecting mechanism through an exhaust pipe, and gas in the shell is pumped into the dust removal collecting mechanism through an induced draft fan. The utility model provides a because the coal as fired contains the powder volume and causes the unstable and big problem of broken coal in-process raise dust of boiler burning more.
Description
Technical Field
The utility model relates to a broken coal equipment technical field, more specifically say, the utility model relates to a broken coal device of screening.
Background
The coal of the circulating fluidized bed coal-fired boiler is crushed before entering the boiler, the particle size of the coal particles entering the boiler is required to reach certain fineness, and the crushing is selected according to different parameter requirements, for example, the particle size of the coal particles of the external circulating fluidized bed coal-fired boiler is the best boiler steam outlet rate of 12-18mm. As the purchased coal is lump coal and the pulverized coal content reaches 20-30%, the original coal breaking system is to break all the coal by a coal breaker and send the broken coal into a boiler for combustion. Because the pulverized coal entering the boiler for combustion is more, the combustion temperature of a boiler hearth is often unstable, the temperature of a hearth outlet is higher, the safe operation of the boiler is influenced, and meanwhile, the dust generated in the coal breaking process is very large, so that the environment is influenced and the coal loss is caused.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to address at least the above-mentioned deficiencies and to provide at least the advantages that will be explained hereinafter.
The utility model provides a broken coal device of screening, it solves because the coal as fired contains the powder volume and causes boiler combustion unstability and broken big problem of coal in-process raise dust more.
The utility model provides a broken coal device of screening, it includes:
a coal breaker;
the rotary screen is obliquely arranged in front of a feed port of the coal breaker, an opening at the upper end of the rotary screen is communicated with the feed hopper, an opening at the lower end of the rotary screen extends into the coal breaker through the discharge hopper, and a first discharge hopper is arranged below the rotary screen;
the first conveying belt is arranged right below a lower port of the first discharging hopper;
the shell is communicated with an external dust removal collecting mechanism through an exhaust pipe, and gas in the shell is pumped into the dust removal collecting mechanism through an induced draft fan.
Preferably, the device further comprises a first dust curtain which is a soft strip dust curtain and is arranged at the lower port of the first discharging hopper, and the lower end of the first dust curtain is close to but not in contact with the upper surface of the first conveyor belt.
Preferably, the coal breaker comprises:
the shaftless drum screen is horizontally arranged;
the toothed roller horizontally penetrates through the shaftless drum screen and is driven by a second driving motor to rotate in the shaftless drum screen in the opposite direction to the shaftless drum screen;
the second discharging hopper is arranged below the shaftless drum screen, the second discharging hopper is a hopper with a large upper opening and a small lower opening, a vibrating screen is obliquely arranged in the middle of the hopper to divide the second discharging hopper into an upper cavity and a lower cavity, and a discharging opening is formed in the upper cavity wall on the lower side of the oblique vibrating screen;
the second conveying belt is arranged right below the discharge port;
the shaftless rotary screen is hermetically covered by the shell, and the upper opening of the second discharge hopper is hermetically communicated with the shell.
Preferably, the vibrating screen comprises a screen plate, an elastic piece and a vibrating motor, the screen plate is connected with the inner wall of the second discharge hopper in an inclined mode through the elastic piece, and the vibrating motor is arranged on the upper side of the screen plate.
Preferably, the surfaces of the first conveying belt and the second conveying belt are in a shape that the middle is concave, a second dust curtain is arranged at the lower opening of the second discharging hopper, a third dust curtain is arranged on the discharging port, and the dust curtains are close to but not in contact with the upper surface of the conveying belt.
Preferably, shaftless drum sieve is including the screening cylinder, a plurality of second screening holes have been seted up to the intermediate position of screening cylinder, the below of screening cylinder is provided with the support, screening cylinder below bilateral symmetry is rotated and is connected with two axis of rotation, axis of rotation and screening cylinder axial direction parallel, connect through the driving medium transmission between two axis of rotation, the equal fixed cover in both ends of two axis of rotation is equipped with the driving wheel, the fixed cover in the outside of screening cylinder is equipped with two annular rings, the ring channel has all been seted up in the outside of two annular rings, the inner wall of ring channel is contradicted with two driving wheels that correspond, thereby rotate through two axis of rotation of first driving motor and speed reducer drive and drive the screening cylinder and rotate.
Preferably, the first drive motor, the speed reducer, and the second drive motor are disposed outside the housing.
Preferably, the toothed roller comprises a roller shaft and a plurality of crushing teeth fixed on the periphery of the roller shaft, the roller shaft is rotatably arranged on the axis of the shaftless drum screen in a penetrating mode through a bearing and a fixing piece, and the crushing teeth are arranged in a staggered mode.
Preferably, the inner wall of the shaftless drum screen is provided with a plurality of flexible plates which are hard battens, and the flexible plates are parallel to the axial direction of the shaftless drum screen.
Preferably, a plurality of reinforcing ribs are arranged on the inner wall of the shaftless drum screen, and each reinforcing rib comprises a plurality of annular rings and axial reinforcing steel bars which are fixedly arranged along the inner wall.
The utility model discloses at least, include following beneficial effect:
1. the utility model provides a because the coal as fired contains the problem that the powder volume causes boiler combustion instability and broken coal in-process raise dust big more, install the drum sieve additional before coal-fired entering rubbing crusher, go out fine coal sieve earlier and no longer get into the coal breaker, only lump coal gets into the coal breaker and smashes, solves fine coal and is continued to smash the problem of raise dust and increase fine coal volume. Meanwhile, the whole drum screen, the coal breaker, the coal outlet and the like are communicated in a sealed mode through a shell, the draught fan is adopted, dust in the draught fan is led into an external dust removal collecting mechanism through an exhaust pipe to be removed, and the dust removal collecting mechanism can be a cyclone dust collector, a water film dust collector or other existing dust removal equipment.
2. The utility model discloses a lower port at first play hopper sets up first dust curtain, can further reduce the environmental pollution that coal outlet raise dust caused.
3. The utility model discloses a broken coal machine improves crushing effect through screening cylinder and fluted roller opposite direction rotation, and has the advantage of smashing and screening go on in step, not only raises the efficiency and smashes the effect, reduces granule material, buggy moreover and is caused the problem of fine coal volume increase and loss by repeated crushing.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a coal sieving and breaking device according to the present invention;
fig. 2 is an enlarged schematic structural view of a coal breaker of the coal screening and breaking device according to an embodiment of the present invention;
FIG. 3 is an enlarged cross-sectional view taken along line A-A of FIG. 2;
wherein, the feed hopper 1; a first housing 2; a drum screen 3; a first screening well 4; a support frame 5; a first discharge hopper 6; a first conveyor belt 71; a first dust curtain 8; a second dust curtain 9; a second discharge hopper 10; a bracket 11; a first drive motor 12; a speed reducer 13; a second drive motor 14; a coal breaker 15; a second screening well 16; a second housing 17; a discharge hopper 18; an exhaust duct 19; a rotating shaft 20; a driving pulley 21; the spur rollers 22; crushing teeth 23; a flexible board 24; a second conveyor belt 72; a third dust curtain 73; a vibrating screen 74.
Detailed Description
The present invention is further described in detail below with reference to examples to enable those skilled in the art to practice the invention with the help of the description.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "disposed" are to be construed broadly, and may for example be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
FIGS. 1-3 illustrate an embodiment of a screen coal breaker apparatus including a coal breaker 15; the rotary screen 3 is obliquely arranged in front of a feed inlet of the coal breaker 15, an opening at the upper end of the rotary screen 3 is communicated with the feed hopper 1 and is used for discharging materials from the feed hopper 1 into the rotary screen 3, an opening at the lower end of the rotary screen 3 is a coarse material outlet, an opening at the lower end extends into the coal breaker 15 through a discharge hopper 18, large fire coals screened out by the rotary screen 3 are introduced into the coal breaker 15, and a first discharge hopper 6 is arranged below the rotary screen 3; a first conveyor belt 71 provided directly below the lower end of the first hopper 6; the rotary screen 3 is communicated with the shell of the coal breaker 15 in a sealing mode, the upper port of the first discharge hopper 6 is communicated with the shell in a sealing mode to form an integral shell which is connected with the shell in a sealing mode, the lower port of the first discharge hopper 6 is a fine material outlet, the shell is communicated with an external dust removal collection mechanism through an exhaust pipe 19, and gas in the shell is pumped into the dust removal collection mechanism through an induced draft fan.
The utility model discloses a first play hopper 6 is used for collecting the fine material that trommel sieve 3 sieved out is exported first conveyer belt 71 on, and the buggy that the coal-fired screening that will smash before comes out carries the coal bunker and collects the processing, solves fine material (fine coal) and is continued to smash the problem of raise dust and increase fine coal volume, and the fine material that sieves out in this embodiment indicates fine coal. And simultaneously, the utility model discloses through the sealed intercommunication of shell to whole drum sieve 3, broken coal machine 15 and first hopper 6 etc. adopt the draught fan, let in outside dust removal collection mechanism with its inside dust through exhaust column 19 and remove dust, can reduce environmental pollution again to the collection of dust.
The utility model discloses a drum sieve 3 erects in first conveyer belt 71 top through support frame 5, and drum sieve 3 can be current axle drum sieve or shaftless drum sieve, and 3 intermediate positions of drum sieve all are equipped with a plurality of first screening holes 4, and the size of first screening hole 4 sieves out buggy size design according to the technological parameter requirement, can be 1-8mm usually. In the attached drawings, the shells comprise a first shell 2 and a second shell 17, the shell covered by the rotary screen 3 is the first shell 2, the shell covered by the coal breaker 15 is the second shell 17, and the connection part of the coarse material outlet of the rotary screen 3 and the feed inlet of the coal breaker 15 is designed to hermetically communicate the two shells.
The utility model discloses a use and effect do: starting the drum screen 3, the coal breaker 15 and the first conveying belt 71, adding the pulverized coal into the drum screen 3 through the feed hopper 1, screening to remove the coal dust, conveying the coal dust to a coal bunker through the first conveying belt 71 for collection, feeding coarse materials screened by the drum screen 3 into the coal breaker 15 for pulverization, and providing the pulverized coal to a boiler for combustion. The utility model provides a because the coal as fired contains the powder volume and causes the unstable problem that the boiler combustion is big with broken coal in-process raise dust more, install trommel screen 3 additional before coal-fired entering rubbing crusher, go out the fine coal screen earlier and no longer get into coal breaker 15, only lump coal gets into coal breaker 15 and smashes, solves fine coal and is continued to smash the problem of raise dust and increase fine coal volume. Meanwhile, the whole drum screen 3, the coal breaker 15, the coal outlet and the like are communicated in a sealed mode through a shell, a draught fan is adopted, dust in the draught fan is led into an external dust removal collecting mechanism through an exhaust pipe 19 to be removed, and the dust removal collecting mechanism can be a cyclone dust collector, a water film dust collector or other existing dust removing equipment. The utility model discloses the fine coal volume of going into the stove that has significantly reduced, furnace's combustion temperature is stable before than, does not appear again and causes high temperature coking phenomenon because of the high temperature, has also reduced the coal loss because of the raise dust causes greatly simultaneously. It is expected that there will be a saving of about 200 tons of raw coal per year, with a cost savings of 200 tons per 800 dollars per ton =160000.
On the basis of the above implementation manner, the further optimization scheme further includes a first dust-proof curtain 8 which is a soft-strip dust-proof curtain and is arranged at the lower port of the first discharge hopper 6, and the lower end of the first dust-proof curtain 8 is close to but not in contact with the upper surface of the first conveying belt 71. Through set up first dustproof curtain 8 at the lower port of first play hopper 6, can further reduce the environmental pollution that the mouth raise dust of coal play caused.
On the basis of the above implementation manner, the scheme is further optimized, and the coal breaker 15 comprises:
the shaftless drum screen is horizontally arranged; the fluted roller 22 horizontally penetrates through the shaftless rotary screen, namely coaxially penetrates through the shaftless rotary screen, and the fluted roller 22 is driven by the second driving motor 14 to rotate in the shaftless rotary screen in the direction opposite to the direction of the shaftless rotary screen and is used for crushing the fire coal in the shaftless rotary screen; the second discharging hopper 10 is arranged below the shaftless drum screen, the second discharging hopper 10 is a hopper with a large upper opening and a small lower opening, a vibrating screen 74 is obliquely arranged in the middle of the hopper to divide the second discharging hopper 10 into an upper cavity and a lower cavity, and a discharging port is formed in the upper cavity wall on the lower side of the oblique vibrating screen 74; a second conveyor belt 72 disposed directly below the discharge port; the shaftless rotary screen is hermetically covered by a shell, and an upper opening of the second discharge hopper 10 is hermetically communicated with the shell.
The second conveyer belt 72 is used for receiving and conveying the granular materials output by the discharge port. The second discharge hopper 10 is used for collecting the materials screened by the shaftless drum screen and screening fine materials and particle materials by the vibrating screen 74, the fine materials are output to the first conveying belt 71 through the lower opening of the second discharge hopper 10 and then conveyed to the coal bunker for collection and treatment, and the particle materials are output to the second conveying belt 72 through the discharge hole in the upper cavity wall and supplied to the boiler for combustion. The utility model discloses a broken coal machine 15 improves crushing effect through the opposite direction upset, and has the advantage of smashing and screening go on in step, not only raises the efficiency and smashes the effect, reduces the granule material moreover and is caused the problem of fine coal volume increase and loss by repeated crushing.
On the basis of the implementation mode, in a further optimized scheme, the vibrating screen 74 comprises a screen plate, an elastic piece and a vibrating motor, the screen plate is obliquely connected with the inner wall of the second discharging hopper 10 through the elastic piece, and the vibrating motor is arranged on the upper side of the screen plate. The elastic member is selected from a spring, a cushion, and the like. The screen hole size of the screen plate is designed according to the size of the pulverized coal screened out by the technological parameter requirements, and can be usually 1-8mm so as to screen out the pulverized coal generated by crushing. The second screening holes 16 of the shaftless rotary screen are designed according to the requirements of process parameters, for example, the second screening holes 16 are designed to be 12-18mm.
On the basis of the implementation mode, the scheme is further optimized, the surfaces of the first conveying belt 71 and the second conveying belt are in a shape that the middle is concave downwards, namely the belts in the cross section vertical to the running direction of the first conveying belt 71 and the second conveying belt 72 are arc-shaped, and the conveying belts are favorable for bearing materials and conveying; the lower opening of the second discharging hopper 10 is provided with a second dust curtain 9, the discharging port is provided with a third dust curtain 73, and the dust curtains are close to but not in contact with the upper surface of the conveying belt and used for reducing dust at the coal outlet.
On above-mentioned implementation's basis, further optimization scheme, shaftless drum sieve is including the screening cylinder, a plurality of second screening holes 16 have been seted up to the intermediate position of screening cylinder, the below of screening cylinder is provided with support 11, screening cylinder below bilateral symmetry is rotated and is connected with two axis of rotation 20, axis of rotation 20 and screening cylinder axial direction parallel, connect through the driving medium transmission between two axis of rotation 20, for example, the belt, driving medium such as belt pulley, the equal fixed cover in both ends of two axis of rotation 20 is equipped with driving wheel 21, the fixed cover in outside of screening cylinder is equipped with two rings, the ring channel has all been seted up in the outside of two rings, the inner wall of ring channel is contradicted with two driving wheel 21 that correspond, thereby rotate through two axis of rotation 20 of first driving motor 12 and 13 drive screening cylinder and drive. The two rotating shafts 20 are fixed on the bracket 11 through bearings and connecting pieces, and the bracket 11 is fixedly erected through the support frame 5.
On the basis of the above implementation mode, the scheme is further optimized, the first driving motor 12, the speed reducer 13 and the second driving motor 14 are arranged outside the shell, and the influence of dust raising in the shell is avoided.
On the basis of the implementation mode, the scheme is further optimized, the toothed roller 22 comprises a roller shaft and a plurality of crushing teeth 23 fixed on the periphery of the roller shaft, the roller shaft is rotatably arranged on the axis of the shaftless drum screen in a penetrating mode through a bearing and a fixing piece, and the crushing teeth 23 are arranged in a staggered mode to improve the crushing effect.
On the basis of the implementation mode, the scheme is further optimized, the inner wall of the shaftless drum screen is provided with a plurality of flexible plates 24 which are hard plate strips, the flexible plates 24 are parallel to the axial direction of the shaftless drum screen, and the flexible plates 24 are used for overturning and stirring materials in the shaftless drum screen, so that the materials can be turned and crushed.
On above-mentioned implementation's basis, further optimization scheme, shaftless drum sieve inner wall is provided with a plurality of reinforcement muscle, the reinforcement muscle includes a plurality of annular ring and the axial reinforcement that sets firmly along the inner wall, and the reinforcing muscle structure is not shown in the figure, and the power component of not shown drum sieve 3 in the figure etc. and the reinforcement muscle is used for consolidating the screening cylinder, does benefit to bold heavy burden and smashes in shaftless drum sieve.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the applications listed in the specification and the examples. It can be applicable to various and be fit for the utility model discloses a field completely. Additional modifications will readily occur to those skilled in the art.
Claims (10)
1. Broken coal device of screening, it includes the coal breaker, its characterized in that still includes:
the rotary screen is obliquely arranged in front of a feed port of the coal breaker, an opening at the upper end of the rotary screen is communicated with the feed hopper, an opening at the lower end of the rotary screen extends into the coal breaker through the discharge hopper, and a first discharge hopper is arranged below the rotary screen;
the first conveying belt is arranged right below a lower port of the first discharging hopper;
the shell is communicated with an external dust removal collecting mechanism through an exhaust pipe, and gas in the shell is pumped into the dust removal collecting mechanism through an induced draft fan.
2. The coal screening and breaking device of claim 1, further comprising a first dust curtain which is a soft strip dust curtain and is disposed on the lower end of the first discharge hopper, and the lower end of the first dust curtain is close to but not in contact with the upper surface of the first conveyor belt.
3. A coal screening breaking apparatus as claimed in claim 1 or claim 2, wherein said coal breaker includes:
the shaftless drum screen is horizontally arranged;
the toothed roller horizontally penetrates through the shaftless drum screen and is driven by a second driving motor to rotate in the shaftless drum screen in the opposite direction to the shaftless drum screen;
the second discharge hopper is arranged below the shaftless rotary screen, the second discharge hopper is a hopper with a large upper opening and a small lower opening, the middle part of the hopper is obliquely provided with a vibrating screen so as to divide the second discharge hopper into an upper cavity and a lower cavity, and the upper cavity wall on the lower side of the oblique vibrating screen is provided with a discharge hole;
the second conveying belt is arranged right below the discharge hole;
the shaftless drum screen is covered by a shell in a sealing mode, and an upper opening of the second discharge hopper is communicated with the shell in a sealing mode.
4. A coal screening and breaking apparatus as claimed in claim 3, wherein said vibrating screen includes a screen plate, an elastic member and a vibrating motor, said screen plate is connected to the inner wall of said second hopper through the elastic member, said vibrating motor is disposed on the upper side of the screen plate.
5. The coal screening and breaking device of claim 4, wherein the surfaces of the first conveyor belt and the second conveyor belt are concave downward, the lower opening of the second discharge hopper is provided with a second dust curtain, the discharge port is provided with a third dust curtain, and the dust curtains are close to but not in contact with the upper surface of the conveyor belt.
6. The coal screening and breaking device of claim 5, wherein the shaftless roller screen comprises a screening roller, a plurality of second screening holes are formed in the middle of the screening roller, a support is arranged below the screening roller, two rotating shafts are symmetrically and rotatably connected to the two sides of the screening roller, the rotating shafts are axially parallel to the screening roller and are in transmission connection with each other through a transmission component, driving wheels are fixedly sleeved at two ends of each of the two rotating shafts, two annular rings are fixedly sleeved on the outer sides of the screening roller, annular grooves are formed in the outer sides of the two annular rings, inner walls of the annular grooves abut against the corresponding two driving wheels, and the first driving motor and the speed reducer drive the two rotating shafts to rotate so as to drive the screening roller to rotate.
7. A coal screening breaking apparatus as claimed in claim 6, wherein said first drive motor, reducer and second drive motor are disposed outside the housing.
8. The coal screening and breaking device of claim 7, wherein the toothed roller comprises a roller shaft and a plurality of crushing teeth fixed on the periphery of the roller shaft, the roller shaft is rotatably arranged on the axis of the shaftless drum screen through a bearing and a fixing piece, and the plurality of crushing teeth are arranged in a staggered mode.
9. A screening coal-breaking device according to any one of claims 4 to 8, wherein the inner wall of the shaftless drum screen is provided with a plurality of flexible plates which are hard slats, and the flexible plates are parallel to the axial direction of the shaftless drum screen.
10. A coal screening and breaking apparatus as claimed in claim 9, wherein the shaftless trommel has a plurality of reinforcing ribs provided on an inner wall thereof, the reinforcing ribs including a plurality of annular rings and axial reinforcing bars secured along the inner wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221318485.5U CN217774236U (en) | 2022-05-30 | 2022-05-30 | Coal screening and breaking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221318485.5U CN217774236U (en) | 2022-05-30 | 2022-05-30 | Coal screening and breaking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217774236U true CN217774236U (en) | 2022-11-11 |
Family
ID=83911473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221318485.5U Active CN217774236U (en) | 2022-05-30 | 2022-05-30 | Coal screening and breaking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217774236U (en) |
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2022
- 2022-05-30 CN CN202221318485.5U patent/CN217774236U/en active Active
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