CN208504991U - A kind of explosion protection system of coal roller drier - Google Patents
A kind of explosion protection system of coal roller drier Download PDFInfo
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- CN208504991U CN208504991U CN201820707487.0U CN201820707487U CN208504991U CN 208504991 U CN208504991 U CN 208504991U CN 201820707487 U CN201820707487 U CN 201820707487U CN 208504991 U CN208504991 U CN 208504991U
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Abstract
The utility model relates to a kind of explosion protection systems of coal roller drier, belong to coal mine explosion-proof security technology area.Technical solution is: being made of enclosed oxygen isolation charging gear and raising material unit, enclosed oxygen isolation charging gear is arranged between the material inlet and scrapper conveyor or rubber conveyer of coal roller drier, and raising material unit is arranged in coal roller drier inner tail end.The utility model effectively prevents being mixed into for air by control system air leak rate of air curtain, makes in coal roller drier oxygen content 15% hereinafter, well below coal-dust explosion to the needs of oxygen content；By the raising material unit of transformation and optimization coal roller drier inner tail end, reentrainment of dust is avoided, considerably reduces coal dust dust concentration and its content, eliminates the necessary and sufficient condition of coal-dust explosion, inhibits the generation of dust explosion accident.
Description
Technical field
The utility model relates to a kind of explosion protection systems of coal roller drier, belong to coal mine explosion-proof security technology area.
Background technique
Coal can generate a certain amount of coal dust in the drying process, and coal dust itself has explosion hazard, influence
Its three element exploded are as follows: 1) coal dust must be suspended in the air, and reach certain explosible limit concentration: lower limit 30-
50g/m3, the upper limit is 1500-2000g/m3；2) there is the high temperature heat source lighted and ignite coal dust, the ignition temperature of coal-dust explosion
It is 610 DEG C -1050 DEG C；3) content of sufficient oxygen, oxygen is greater than 18%, generates coal-dust explosion if this three elements is provided simultaneously with.
Coal roller drying system is mainly by high temperature hot-blast furnace, coal roller drier, dedusting and drum, blower unit group
At equipped with scrapper conveyor or rubber conveyer, the inner tail end of coal roller drier above the material inlet of coal roller drier
Equipped with raising material unit.Its working principle be exactly pass through air-introduced machine by hot wind furnace high-temperature hot fume suck drying machine in and coal into
Row sets heat exchange, evaporates its moisture and improves heating value of coal.Coal carries out leaving collision movement in drying machine, with moisture
Reduction, generate a large amount of coal dusts, easily reach explosible limit concentration, in addition due to coal drying system be high negative pressure operation,
While 800 DEG C -900 DEG C of high warm flue gas is inhaled into drying machine, large quantity of air is sucked by the system coal-in port of blow-by,
The oxygen content in drying machine is increased, the oxygen content in engineering measurement drying machine reaches 18%-19%, and coal-dust explosion condition has, institute
With dust explosion accident easily occurs for coal roller drier in such a case.Control the oxygen content in roller drying system
And Dust Concentration inhibits coal dust detonation, explosion to realize, is this field technical problem urgently to be resolved.
Utility model content
The utility model aim is to provide a kind of explosion protection system of coal roller drier, to the wherein two for generating explosion
Element is controlled, and controls oxygen content and Dust Concentration in coal roller drier, is realized and is inhibited coal dust detonation, explosion, disappears
Except the necessary and sufficient condition of coal-dust explosion, inhibit the generation of dust explosion accident, solves the above problem present in background technique.
A kind of explosion protection system of coal roller drier, is made of enclosed oxygen isolation charging gear and raising material unit, it is closed every
Oxygen charging gear is arranged between the material inlet and scrapper conveyor or rubber conveyer of coal roller drier, enclosed oxygen isolation feed dress
It sets comprising rotary shaft, arc rotary blade and seal bootr, seal bootr is located at below scrapper conveyor or rubber conveyer, coal roller is dry
It is circular arc chamber inside seal bootr above the material inlet of dry machine, is equipped with rotary shaft, the circumference of rotary shaft is rotated equipped with multiple arcs
Blade, arc rotary blade are that arc segment is combined with straightway, and the root with rotation axis connection is inside straightway, with seal bootr
The matched end of circular arc chamber is arc section, and the root of two adjacent arc rotary blades is linked together by arc panel, arc
The radius of turn of shape rotating vane and the inner cavity arc radius of seal bootr match；The upper port of seal bootr by feeding chute with
Scrapper conveyor or rubber conveyer connection, the lower port of seal bootr are connected to the material inlet of coal roller drier；Whole arc shaped rotaries
The bending direction of rotating vane piece is identical with crooked radian, and the bending direction of arc rotary blade is downward；Rotary shaft not with power device
Connection；The axis of rotary shaft is parallel with the great wheel axis of scrapper conveyor or rubber conveyer, rotating shaft center and scrapper conveyor or adhesive tape
The great wheel axis center of conveyer is not on same vertical line；The upper port center and lower port center of seal bootr are and rotating shaft center
Not on same vertical line；Seal bootr and feeding chute airtight connection, are integrally formed, and prevent arc rotary blade from bringing into when rotating cold
Air enters；Arc rotary blade is evenly distributed in the circumferential direction in rotary shaft, and the circular arc of arc rotary blade is bent downwardly, object
Material is directly fallen on arc surface when falling, and is glided along arc-shaped surface, and rotates arc rotary blade, and arc rotary blade passes through
Rotation is completely cut off, and effectively air is prevented to enter coal roller drier；Effectively oxygen content in control coal roller drier；
Raising material unit is set in coal roller drier inner tail end, raising material unit includes bottom round steel, junction steel plate, arc
Shape round steel, arc side plate one, chain and arc side plate two；The both ends of junction steel plate respectively with arc side plate one and arc side plate
The lower end of two upper end connection, arc side plate one and arc side plate two is connect with the both ends of bottom round steel respectively, curved side
Plate one is identical with the radian of arc side plate two, equal length, and vertical with bottom round steel and junction steel plate, bottom round steel, even
Connect steel plate, arc side plate one and arc side plate two constitute rectangular frame, rectangular frame is equipped with more arc round steel, arc round steel with
Arc side plate one is identical with the radian of arc side plate two, equal length, and parallel with arc side plate one and arc side plate two, in phase
Between adjacent arc round steel, chain is equipped between arc round steel and arc side plate one and arc side plate two, one end of chain is fixed
On junction steel plate, the other end is fixed on the round steel of bottom, constitutes chain-type lifting blade；It is dry that junction steel plate is fixed on coal roller
On the inner wall of dry machine inner tail end；Multiple chain-type lifting blades are arranged in coal roller drier inner tail end, when material being made to fall
It is passed through among chain, it is forbidden to raise, and chain-type lifting blade differs in size, arranged for interval, chain-type lifting blade is arranged in
Coal roller drier inner tail end, to export material quickly, when chain-type lifting blade is installed and in coal roller drier
Heart line is not parallel；Chain-type lifting blade avoids reentrainment of dust, reduces dust concentration and its content.
The enclosed oxygen isolation charging gear, when arc rotary blade is in 180 ° with feeding chute center line, arc rotary
Blade reaches minimum away from the gap of feeding chute side plate, and arc rotary blade tip is designed to arc section, arc rotary blade tail
End is designed to straightway, and the width of arc rotary blade is slightly narrower than seal bootr inner cavity, guarantees arc rotary blade in seal bootr
Portion's smooth rotation.It being fallen into when to prevent material from falling between two arc rotary blades, cleaning difficulty increases, therefore between two blades
Add arc panel.Two support frames are separately mounted on the outer wall of seal bootr two sides, support frame be equipped with bearing block, the two of rotary shaft
End is separately positioned on respective bearing block；It is welded to connect between arc rotary blade and rotary shaft using dihedral angle, arc shaped rotary
Rotating vane piece and arc panel are all made of high temperature resistant material and are made.
The head funnel of the feeding chute top and scraper plate motor spindle or rubber conveyer passes through flanged joint.
The arc side plate one and arc side plate two of chain-type lifting blade two sides are the irregular roundness camber with circular arc
The part that the top of plate, arc side plate one and arc side plate two is in contact with coal roller drier inner tail end inner wall is wider,
Play a part of reinforce, lower part is relatively narrow, prevent its strip, between arc side plate one and arc side plate two top junction steel plate by it
Link into an integrated entity, junction steel plate and coal roller drier inner wall weld；The a plurality of chain of chain-type lifting blade and more arcs
Shape round steel arranged for interval has sag after chain is fixed, when the rotation of coal roller drier, if material adheres to chain
It on loop chain, is shot down by the shake or rapping of chain, entire chain-type lifting blade material is all made of heat-resisting material.
The good effect of the utility model is: being controlled to two elements for generating explosion, is leaked out by control system
Rate effectively prevents being mixed into for air, makes in coal roller drier oxygen content 15% hereinafter, well below coal-dust explosion
To the needs of oxygen content；Without dynamic Control, is driven completely using the gravity that coal falls, reduce failure rate and maintenance
Rate；By the raising material unit of transformation and optimization coal roller drier inner tail end, reentrainment of dust is avoided, coal dust is considerably reduced
Dust concentration and its content eliminate the necessary and sufficient condition of coal-dust explosion, inhibit the generation of dust explosion accident.
Detailed description of the invention
Fig. 1 is the utility model embodiment enclosed oxygen isolation charging gear structural schematic diagram；
Fig. 2 is the utility model embodiment enclosed oxygen isolation charging gear side structure schematic view；
Fig. 3 is the utility model embodiment raising material unit arragement construction schematic side view；
Fig. 4 is the utility model embodiment raising material unit positive structure schematic；
In figure: scrapper conveyor 1, feeding chute 2, arc rotary blade 3, coal roller drier 4, support frame 5, rotary shaft 6,
Bearing block 7, arc panel 8, material inlet 9, bottom round steel 10, junction steel plate 11, arc round steel 12, arc side plate 1, chain 14,
Arc side plate 2 15, seal bootr 16.
Specific embodiment
Below in conjunction with attached drawing, by embodiment, the utility model is described in further detail.
A kind of explosion protection system of coal roller drier, is made of enclosed oxygen isolation charging gear and raising material unit, it is closed every
Oxygen charging gear is arranged between the material inlet and scrapper conveyor or rubber conveyer of coal roller drier, enclosed oxygen isolation feed dress
It sets comprising rotary shaft 6, arc rotary blade 3 and seal bootr 16, seal bootr 16 is located at scrapper conveyor or rubber conveyer lower section, coal
Above the material inlet 9 of roller drier 4, it is circular arc chamber inside seal bootr 16, is equipped with rotary shaft 6, the circumference of rotary shaft 6 is equipped with
Multiple arcs rotating vane 3, arc rotary blade 3 are that arc segment is combined with straightway, and the root connecting with rotary shaft 6 is straight line
Section is arc section with the 16 inside matched end of circular arc chamber of seal bootr, and the root of two adjacent arc rotary blades 3 passes through arc
Shape plate 8 links together, and the radius of turn of arc rotary blade 3 matches with the inner cavity arc radius of seal bootr 16；Seal bootr
16 upper port is connected to by feeding chute 2 with scrapper conveyor or rubber conveyer, and the lower port and coal roller of seal bootr 16 are dry
The material inlet 9 of dry machine 4 is connected to；The bending direction of whole arc rotary blades 3 is identical with crooked radian, arc rotary blade 3
Bending direction is downward；Rotary shaft 6 is not connect with power device；The axis and scrapper conveyor of rotary shaft or the great wheel axis of rubber conveyer
Line is parallel, and rotating shaft center is with the great wheel axis center of scrapper conveyor or rubber conveyer not on same vertical line；Seal bootr 16 it is upper
Port center and lower port center be not with rotating shaft center on same vertical line；Seal bootr 16 and feeding chute airtight connection,
It is integrally formed, prevents arc rotary blade from bringing cold air entrance when rotating into；Arc rotary blade is along the circumferential direction in rotary shaft
It is evenly arranged, the circular arc of arc rotary blade is bent downwardly, and material is directly fallen on arc surface when falling, under arc-shaped surface
It is sliding, and arc rotary blade is rotated, arc rotary blade is completely cut off by rotation, and air is effectively prevented to enter coal rolling
Drum drier 4；Effectively oxygen content in control coal roller drier；
Raising material unit is set in coal roller drier inner tail end, raising material unit includes bottom round steel 10, junction steel plate
11, arc round steel 12, arc side plate 1, chain 14 and arc side plate 2 15；The both ends of junction steel plate 11 respectively with arc
Side plate 1 is connected with the upper end of arc side plate 2 15, the lower end of arc side plate 1 and arc side plate 2 15 respectively with bottom
The both ends of portion's round steel 10 connect, and arc side plate 1 is identical with the radian of arc side plate 2 15, equal length, and with bottom circle
Steel 10 and junction steel plate 11 are vertical, and bottom round steel 10, junction steel plate 11, arc side plate 1 and arc side plate 2 15 constitute rectangle
Frame, rectangular frame are equipped with more arc round steel 12, the radian of arc round steel 12 and arc side plate 1 and arc side plate 2 15
Identical, equal length, and it is parallel with arc side plate 1 and arc side plate 2 15, between adjacent arc round steel 12, arc
Chain 14 is equipped between round steel and arc side plate 1 and arc side plate 2 15, one end of chain 14 is fixed on junction steel plate 11
On, the other end is fixed on bottom round steel 10, constitutes chain-type lifting blade；Junction steel plate 11 is fixed on coal roller drier 4
On the inner wall of inner tail end；Multiple chain-type lifting blades are arranged in 4 inner tail end of coal roller drier, make material when falling in chain
It is passed through among item, forbids it to raise, and chain-type lifting blade differs in size, arranged for interval, chain-type lifting blade is arranged in coal
Roller drier inner tail end, to export material quickly, chain-type lifting blade install when with coal roller drier center line
It is in a certain angle, it is not parallel；Chain-type lifting blade avoids reentrainment of dust, reduces dust concentration and its content.
The enclosed oxygen isolation charging gear, when arc rotary blade is in 180 ° with feeding chute center line, arc rotary
Blade reaches minimum away from the gap of feeding chute side plate, and arc rotary blade tip is designed to arc section, arc rotary blade tail
End is designed to straightway, and the width of arc rotary blade is slightly narrower than seal bootr inner cavity, guarantees arc rotary blade in seal bootr
Portion's smooth rotation.It being fallen into when to prevent material from falling between two arc rotary blades, cleaning difficulty increases, therefore between two blades
Add arc panel.Two support frames 5 are separately mounted on the outer wall of seal bootr two sides, and support frame 5 is equipped with bearing block 7, rotary shaft 6
Both ends be separately positioned on respective bearing block 7；It is welded to connect between arc rotary blade and rotary shaft using dihedral angle, arc
Shape rotating vane and arc panel are all made of high temperature resistant material and are made.
The head funnel of the feeding chute top and scraper plate motor spindle or rubber conveyer passes through flanged joint.
The arc side plate 1 and arc side plate 2 15 of chain-type lifting blade two sides are the irregular roundness with circular arc
The top of camber plate, arc side plate 1 and arc side plate 2 15 is in contact with 4 inner tail end inner wall of coal roller drier
Part is wider, plays a part of to reinforce, and lower part is relatively narrow, prevents its strip, top between arc side plate 1 and arc side plate 2 15
Junction steel plate 11 they are linked into an integrated entity, junction steel plate 11 and coal roller drier inner wall weld；Chain-type lifting blade
A plurality of chain and more arc round steel arranged for interval, there is sag after chain is fixed, when the rotation of coal roller drier,
If material adheres on the loop chain of chain, shot down by the shake or rapping of chain, entire chain-type lifting blade material is equal
Using heat-resisting material.
In embodiment, coal is fed on scrapper conveyor 1 by upstream equipment, is then transported under head discharging entrance
Expect chute 2, when falling on arc rotary blade 3 under coal, the gravity of material promotes arc rotary blade to rotate, when first
When arc rotary blade goes to lower section beginning blanking, next arc rotary blade, which also rotates with, reaches feeding chute bottom,
Feeding chute 2 is sealed completely, then proceedes to repeat upper one to act, since two arc rotary blade dovetails are tighter, therefore can be at
Air is prevented to function to be inhaled by feeding device into coal roller drier, rotation of the coal also with arc rotary blade
It is brought to the coal roller drier material inlet 9 of lower section, into coal roller drier, is dried.
It after coal enters coal roller drier 4, is raised by the grid section formula lifting blade inside front end, forms material curtain and hot cigarette
Gas, which comes into full contact with, set heat exchange, evaporation water achieve the purpose that it is dry, when coal is to coal roller drying drive end unit,
It is completely dried, no longer needs to raise, therefore when the rotation of coal roller drier, the coal after tail portion is dry is dry with coal roller
The rotation of dry machine passes through among chain-type lifting blade, avoids reentrainment of dust, reduces the generation of coal dust, also mitigate simultaneously
The burden of drying system rear portion cleaner, extends the service life of equipment.
Based on by the moisture content of dry coal, ash, fugitive constituent and it is dry after product quality the industrial indexs such as require, in conjunction with dry
Drying system technical matters feature determines that when coal roller drier inlet temperature reaches 350 DEG C -450 DEG C or so, coal starts
Into system, feeding coal is controlled using the frequency conversion of upstream feeding device or using screw feeder at this time, and guarantees the company of feed
The phenomenon that continuing property, not may occur in which fracture, furnace temperature will be kept constant at this time, cannot be fluctuated, and coal feedstock moisture will control
Within the scope of one, forbid moisture too high or too low, the revolving speed of coal roller drier is in 4-6r/min or so, internal air-flow
Desin speed value is 5m/s, and under this wind speed, coal dust will not be flown upward, and the speed of air-flow will be adjusted by the cooperation of induced draft
It is whole, it should guarantee the negative pressure in drying system, the moisture that guarantees to discharge again is 15% or so, while coal roller drier exports
Temperature to control at 100 DEG C or so, outlet temperature is too low, the phenomenon that " condenses " occurs, and temperature is too high, generates dry, makes
Dust Concentration increases.
The improvement of enclosed oxygen isolation device and lifting blade and the optimization of system conditions, directly inhibit coal drying system
Coal-dust explosion in system eliminates dangerous hidden danger, while also improving the working environment of worker.
Claims (1)
1. a kind of explosion protection system of coal roller drier, it is characterised in that: by enclosed oxygen isolation charging gear and raising material unit group
At enclosed oxygen isolation charging gear is arranged between the material inlet and scrapper conveyor or rubber conveyer of coal roller drier, closed
Oxygen barrier charging gear includes rotary shaft (6), arc rotary blade (3) and seal bootr (16), seal bootr (16) be located at scrapper conveyor or
Below rubber conveyer, above the material inlet (9) of coal roller drier (4), it is circular arc chamber inside seal bootr (16), is equipped with rotation
The circumference of shaft (6), rotary shaft (6) is equipped with multiple arcs rotating vane (3), and arc rotary blade (3) is for arc segment and directly
Line segment combination, the root connecting with rotary shaft (6) are straightway, are circular arc with the internal matched end of circular arc chamber of seal bootr (16)
The root of section, two adjacent arc rotary blades (3) is linked together by arc panel (8), the rotation of arc rotary blade (3)
The inner cavity arc radius for turning radius and seal bootr (16) matches；The upper port of seal bootr (16) passes through feeding chute (2) and scrapes
Trigger or rubber conveyer connection, the lower port of seal bootr (16) are connected to the material inlet (9) of coal roller drier (4)；Entirely
The bending direction of portion's arc rotary blade (3) is identical with crooked radian, and the bending direction of arc rotary blade (3) is downward；Rotation
The axis of axis is parallel with the great wheel axis of scrapper conveyor or rubber conveyer, the head of rotating shaft center and scrapper conveyor or rubber conveyer
Axis center is taken turns not on same vertical line；The upper port center and lower port center of seal bootr (16) be not with rotating shaft center same
On one vertical line；Seal bootr (16) and feeding chute airtight connection, are integrally formed；Arc rotary blade is along the circumferential direction in rotary shaft
It is evenly arranged, the circular arc of arc rotary blade is bent downwardly；
Raising material unit is set in coal roller drier inner tail end, raising material unit includes bottom round steel (10), junction steel plate
(11), arc round steel (12), arc side plate one (13), chain (14) and arc side plate two (15)；The both ends of junction steel plate (11)
Portion is connect with the upper end of arc side plate one (13) and arc side plate two (15) respectively, arc side plate one (13) and arc side plate two
(15) lower end is connect with the both ends of bottom round steel (10) respectively, the radian of arc side plate one (13) and arc side plate two (15)
Identical, equal length, and vertical with bottom round steel (10) and junction steel plate (11), bottom round steel (10), junction steel plate (11),
Arc side plate one (13) and arc side plate two (15) constitute rectangular frame, and rectangular frame is equipped with more arc round steel (12), arc
Round steel (12) is identical as the radian of arc side plate one (13) and arc side plate two (15), equal length, and with arc side plate one
(13) parallel with arc side plate two (15), between adjacent arc round steel (12), arc round steel and arc side plate one (13) and
Chain (14) are equipped between arc side plate two (15), one end of chain (14) is fixed on junction steel plate (11), and the other end is fixed
On bottom round steel (10), chain-type lifting blade is constituted；Junction steel plate (11) is fixed on coal roller drier (4) inner tail end
Inner wall on；Multiple chain-type lifting blades are arranged in coal roller drier (4) inner tail end, when chain-type lifting blade is installed and coal
Charcoal roller drier center line is not parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820707487.0U CN208504991U (en) | 2018-05-14 | 2018-05-14 | A kind of explosion protection system of coal roller drier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820707487.0U CN208504991U (en) | 2018-05-14 | 2018-05-14 | A kind of explosion protection system of coal roller drier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208504991U true CN208504991U (en) | 2019-02-15 |
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ID=65299567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820707487.0U Active CN208504991U (en) | 2018-05-14 | 2018-05-14 | A kind of explosion protection system of coal roller drier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208504991U (en) |
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2018
- 2018-05-14 CN CN201820707487.0U patent/CN208504991U/en active Active
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| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Hunbao Torch Inventor after: Jiang Xirui Inventor after: Kan Xiaojing Inventor after: Cheng Donghao Inventor after: Wang Yichen Inventor after: Zhang Lixiu Inventor after: Wang Jia Inventor after: Li Xuejing Inventor after: Song Ping Inventor after: Liu Manping Inventor before: Hunbao Torch Inventor before: Jiang Xirui Inventor before: Kan Xiaojing Inventor before: Cheng Donghao Inventor before: Wang Yichen Inventor before: Zhang Lixiu Inventor before: Wang Jia Inventor before: Li Xuejing Inventor before: Song Ping Inventor before: Liu Manping |
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| CB03 | Change of inventor or designer information |