CN101613039A - The biomass feed divider of a kind of changeable trough obliquity and oscillation frequency and amplitude - Google Patents
The biomass feed divider of a kind of changeable trough obliquity and oscillation frequency and amplitude Download PDFInfo
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Abstract
The biomass feed divider of a kind of changeable trough obliquity and oscillation frequency and amplitude, adopt and become hopper (4) inclination angle and become oscillation frequency and two kinds of regulating measures of amplitude, by the disturbance force that vibrating motor (9) produces, realize continuous, the stable and safe sub-material of living beings.This device is arranged in juxtaposition by one or more independently feeding distribution mechanisms to be formed, and each feeding distribution mechanism mainly comprises hopper body (4), vibrating mechanism (9), lifting mechanism (8), spring supporting mechanism (11) and auxiliary mechanism; Hopper body (4) is supported by the lifting mechanism (8) at the spring supporting mechanism (11) of front portion and rear portion, and vibrating mechanism (9) is arranged at hopper body (4) middle part at the end, is connected by canvas (3) between the rear portion of hopper body (4) and the bulkhead.This device integrates the storage material and distributes material, both has been fit to hard biomass, also is fit to soft biomass, and has property extending transversely, is convenient to use with the materials coordinative composition of equipments of various ways.
Description
Technical field
The present invention relates to a kind of living beings distributing device of (containing stalk), belong to biomass power generation material loading conveying technology field.
Technical background
China's biomass resource is very abundant, and wherein the agricultural straw resource yearly output surpasses 700,000,000 tons (calorific value is equivalent to 3.5 hundred million tons of standard coals), also has a large amount of forestry waste and mud, rubbish etc. in addition.Biomass power generation is the important way that biomass resource effectively utilizes.The development biomass power generation not only helps energy savings, optimizes energy mix, preserves the ecological environment, and helps improving the life in the countryside condition, improves farmers' income, promotes local economic development.
At present, directly combustion power generation is the main flow of biomass power generation.By the end of the year 2007, the country and the each province Committee of Development and Reform have checked and approved 87 of biomass power generation projects, 2,200,000 kilowatts of total installed capacity scales, and wherein, the biomass direct combustion power generation project that has been constructed and put into operation surpasses 15, more than 30 of projects in construction.According to the planning of Eleventh Five-Year Plan regenerative resource, by 2010, national living beings generating capacity will reach 5,500,000 kilowatts.
Yet, because China's biomass power generation industry is at the early-stage, research to gordian technique is obviously not enough, supporting application technology design is still far from perfect, biomass direct-fired power plant exposes many problems in real-world operation, problems such as smooth, the defeated material difficulty of the key link of biomass power generation---feeding system especially, ubiquity feed have become the primary difficult problem of puzzlement biomass power generation.Present feeding system is usually in the following ways: the living beings through break process are transported to intermediate bunker by band conveyor, distribute to the stokehold feed bin through the distributing device of bottom then, deliver into biomass boiler by front-furnace feeding device again.This shows that as the distributing device of intermediate link, not only play the effect of storage material, and have the effect of system buffer, balanced operation, the serviceability of distributing device is extremely important for the continuous smooth running of whole feeding system.
Prior biological matter distributing device generally adopts spiral to fail the material mode, relies on the rotating band moving blade of screw shaft material to be passed the conveying that realizes material forward exactly.A very big weak point of this sub-material method is have the high capacity feed bin but not possess the storing ability on foot, advances how much to expect how many material, does not give full play to the effect of distributing device system buffer, balanced operation.In case distributing device accumulates a certain amount of material, following a series of problem will occur: because biomass density is little, size is different in size, and shape is intricate, and loft is bigger, and is built on stilts easily in the course of conveying, makes spiral idle running, reduces the discharging homogeneity; Most of hard stalk toughness is pure, and material is easy to jammed between helicallobe and housing, makes the blade wear aggravation, and vexed car phenomenon can take place in the time of serious, burns motor; The soft stalk of part has stronger fiberation, is easy to be wrapped on screw shaft and the blade, increases the equipment power consumption, and destroys rotary balance, reduces the screw shaft strength and stiffness greatly, even the fracture by fatigue phenomenon takes place.In a word, prior biological matter distributing device is not well brought into play sub-material equipment storing and sub-material ability, the appearance of above problem, greatly reduced the service life of equipment, feed off and on, also have a strong impact on the service efficiency of biomass boiler, increased enterprise cost virtually, reduced economic benefit.
In order to solve the difficult problem of living beings storing and sub-material, guarantee the normal operation of feeding system, realize the utilization rapidly and efficiently of biomass energy, press for and add the great development dynamics that development is fit to the biomass feed divider of the possessing continuously of China's biomass resource characteristics, stable and safe sub-material ability.
Summary of the invention
Technical matters: the present invention is directed to difficult storing, difficult sub-material problem that conventional living beings sub-material equipment occurs in the sub-material process, the biomass feed divider of a kind of changeable trough obliquity and oscillation frequency and amplitude is provided, and this device has continuously, the stable and defeated effect of expecting of safety.
Technical scheme: the biomass feed divider that the invention provides a kind of changeable trough obliquity and oscillation frequency and amplitude.Thinking of the present invention is: the employing vibrating motor by becoming the hopper inclination angle and becoming vibrating motor oscillation frequency and two kinds of regulating measures of amplitude, is realized continuous, the stable and safe sub-material of living beings as soruce of vibration.Below with reference to Fig. 1～Fig. 5, specify the specific implementation of technology path of the present invention and target.
Biomass feed divider of the present invention is arranged in juxtaposition by one or more independently feeding distribution mechanisms to be formed, and each feeding distribution mechanism mainly comprises hopper body, vibrating mechanism, lifting mechanism, spring supporting mechanism and auxiliary mechanism; The hopper body is inclined to set and is supported by the lifting mechanism at the spring supporting mechanism of front portion and rear portion, and vibrating mechanism is arranged at the middle part at the bottom of the hopper body, is connected by canvas between the rear portion of hopper body and the bulkhead.
Described hopper body bottom land is a planar shaped, and width is W; Trough rim is a circular arc, and radius R is 0.1～0.2W, and arc chord angle β is 25～58 °, and circular arc trough rim and planar shaped bottom land plane are tangent.
Described lifting mechanism is made up of outer sleeve, spring, slide block, inner core, nut, lifting screw, conical bearing, bearing seat, big gear wheel, vertical frequency control retarder, coupler, miniature gears and support; Wherein, vertical frequency control retarder is fixed on the support, and mouth links to each other with miniature gears by coupler, and two big gear wheels that match are arranged in the left and right sides, and is clipped between two conical bearings up and down that place in the bearing seat; The lifting screw that passes the big gear wheel center and match is on the one hand by being fixed in two nut location up and down of inner core, on the other hand by the slider support spring; Outer sleeve is enclosed within spring and inner core outside.
Described spring supporting mechanism is made up of outer sleeve, spring, inner core and support; Inner core is fixed on the support, and spring is placed in one, and outer sleeve is enclosed within spring and inner core outside.
Described vibrating motor is arranged off-centre, departs from hopper body line of centers 1/6W～1/4W.
The inclination angle variation range of the described hopper body that is inclined to set is 48～80 °.
Beneficial effect: device of the present invention has following characteristic and advantage:
1, the biomass feed divider of changeable trough obliquity of the present invention and oscillation frequency and amplitude, the even sub-material of continous-stable that can be used for biomass material, both be fit to hard biomass such as cotton stalk, cornstalk, also be fit to soft biomass such as wheat straw stalk, rice straw.
2, the hopper front portion links to each other with spring cupport structure via circular screw rod, both sides have been installed direct orbit respectively at the bottom of the rear groove, therefore the antifriction-bearing box that links to each other with lifting structure is stuck in the direct orbit,, by regulating lifting structure, can realize whole hopper freely rotating around circular screw rod.
3, the bowl-shape bin design of circular edges at the bottom of the plane, not only has certain storing ability, and avoided the formation in dead band in the conventional spill hopper, make material on the hopper limit in the vibrating transportation district that constantly converges under the disturbance force that vibrating motor produces in the middle of the hopper.
4, adopt the frequency control vibrating motor as soruce of vibration, both can reduce consumption of power, can realize the frequency conversion luffing vibration of cell body, thereby reach the purpose of regulating sub-material speed by regulating motor speed again.
5, the vibrating motor of arranged off-centre, actv. has destroyed the formation of symmetrical balance power between the material, makes material have stronger flowing power, prevents that material from forming bad phenomenon such as " knot arch ", " bridge formation " in hopper.
6, each hopper all with the lifting structure that is equipped with spring and spring cupport structure as support, both reduced the noise that vibration produces, reduce in the material dropping process impact again to depiler.
7, lifting structure and spring cupport structure adopt the connection mode of outer jacket casing inner core, have both avoided the teeter of movable part in lifting and the vibration processes, have prevented part biological pledge material and dust intrusion sleeve inner again.
8, be connected by canvas between hopper and bulkhead and hopper and the hopper, and leave sufficient expansion space, like this, when satisfying single hopper independent rotation, play sealants again and absorb the effect of vibration.
9, to transfer motor speed, become the hopper inclination angle into auxilliary, two kinds of regulating measures are united utilization, make regulative mode versatile and flexible, have both satisfied the normal sub-material of material routinely, also solve the difficult problem of defeated material of intractable material.
10, according to the amount of capacity of intermediate bunker, distributing device can a plurality of hoppers extending transversely, to satisfy the materials demand of different materials equipment.
11, the size comformability to biomass material is good, and Size Distribution is wide, is 0～300mm, has saved the power consumption of biomass material fragmentation greatly.
Description of drawings
Fig. 1 is the biomass feed divider front view of changeable trough obliquity of the present invention and oscillation frequency and amplitude, wherein has: feed bin import 1, intermediate bunker 2, canvas 3, hopper body 4, direct orbit 5, antifriction-bearing box 6, manhole door 7, lifting structure 8, vibrating motor 9, circular screw rod 10, spring cupport structure 11, bin outlet 12.
Fig. 2 is the structural representation of lifting mechanism 8 of the present invention, comprising: outer sleeve 13, spring 14, slide block 15, inner core 16, nut 17, lifting screw 18, conical bearing 19, bearing seat 20, big gear wheel 21, vertical frequency control retarder 22, coupler 23, miniature gears 24, support 25.
Fig. 3 is the structural representation of spring supporting mechanism 11 of the present invention, comprising: outer sleeve 26, spring 27, inner core 28, support 29.
Fig. 4 is the birds-eye view of the biomass feed divider of changeable trough obliquity of the present invention and oscillation frequency and amplitude, wherein has: canvas 3, hopper 4, direct orbit 5, antifriction-bearing box 6, vibrating motor 9, spring cupport structure 11, bin outlet 12.
Fig. 5 is the bin design scheme drawing of the biomass feed divider of changeable trough obliquity of the present invention and oscillation frequency and amplitude.
The specific embodiment
The biomass feed divider of a kind of changeable trough obliquity of the present invention and oscillation frequency and amplitude mainly is made up of hopper body, vibrating mechanism, lifting mechanism, spring supporting mechanism and auxiliary mechanism, wherein, the hopper body comprises hopper body 4, direct orbit 5, antifriction-bearing box 6; Vibrating mechanism involving vibrations motor 11; Lifting mechanism comprises outer sleeve 13, spring 14, slide block 15, inner core 16, nut 17, lifting screw 18, conical bearing 19, bearing seat 20, big gear wheel 21, vertical frequency control retarder 22, coupler 23, miniature gears 24, support 25; The spring supporting mechanism comprises outer sleeve 26, spring 27, inner core 28, support 29; Auxiliary mechanism comprises feed bin import 1, intermediate bunker 2, canvas 3, circular screw rod 10, bin outlet 12.
Before the depiler work,, adjust the inclination alpha of hopper 4 according to the biomass material characteristic.Hopper body 4 anterior 1/6 places link to each other with spring supporting mechanism 11 via circular screw rod 10,1/6 place has installed direct orbit 5 respectively in both sides at the bottom of the rear groove, the antifriction-bearing box 6 that links to each other with lifting mechanism 8 is stuck in the direct orbit 5, like this, can realize hopper body 4 around freely the rotating of spring cupport structure 11 by regulating lifting mechanism 8, inclination alpha can change between 48～80 °.The adjustment of lifting mechanism 8 mainly realizes in the following manner: vertical frequency control retarder 22 is fixed on the support 25, mouth links to each other with miniature gears 24 by coupler 23, two big gear wheels 21 that match are arranged in the left and right sides, and be clipped between two conical bearings 20 up and down that place in the bearing seat 19, like this, the rotation of motor has passed to big gear wheel 21 by miniature gears 24 decelerations; The lifting screw 18 that passes big gear wheel 21 centers and match, on the one hand by being fixed in two nut 17 location up and down of inner core 16, on the other hand by slide block 15 support springs 14 and outer sleeve 13, like this, the rotation of big gear wheel 21 has driven lifting screw 18 and sliding up and down with upper-part thereof.Simultaneously, outer sleeve 13 is combined closely with inner core 16, has not only avoided swinging of outer sleeve 13 in the lifting process and link thereof, and has prevented the intrusion of part biological pledge material and dust.Adopt identical design, spring cupport structure 11 also has same effect.Hopper body 4 bottom lands are planar shaped, and width is W; Trough rim is a circular arc, and radius R is 0.1～0.2W, and arc chord angle β is 25～58 °, and circular arc trough rim and planar shaped bottom land plane are tangent.
Send into from the feed bin inlet 1 at middle feed bin 2 tops through the biomass material that shreds the 0～300mm that handles, be the movement of falling object to hopper body 4 rear portions of bottom depiler.Material is in banking process, and when stocking angle during greater than angle of repose, top material relies on self gravitation freely to be scattered to the front portion of hopper body 4, piles highly more, looses far more.At this moment, open vibrating motor 9, regulate its rotating speed, making cell body produce low frequency vibrates by a narrow margin, thus the force of inertia of caused material particles perpendicular to the component of bottom land direction less than material particles at partical gravity perpendicular to the bottom land direction, material in this time slot slides and travels forward, and obtains less sub-material speed; When cell body produces the vibration of high frequency high-amplitude, thus the force of inertia of caused material particles perpendicular to the component of bottom land direction greater than material particles perpendicular to the partical gravity of bottom land direction the time, material is thrown in the groove, and, obtain bigger sub-material speed this moment according to parabolical track skip motion forward.Biomass material is in course of conveying, and usually can be meshing with each other because of particle reaches force balance and form wedge shape arch, interrupts the conveying of material, and at this moment, the disturbance force that continues can well destroy the engagement force between the material, eliminates " knot arch " phenomenon.Like this, material evenly is sent bin outlet 12 continuously perpendicular to the disturbance force of cell body with straight down under the double action of self gravitation.
Soft stalk volume is fluffy, toughness is big, causes flowing power relatively poor.When the sub-material material is soft stalk, can't obtain satisfied discharging speed if regulate the vibrating motor rotating speed, can in time heighten the height of lifting screw 18, increase the inclination angle of hopper body 4 with this, the gravity that makes full use of material self strengthens material fluidity, thereby obtains satisfied discharging speed.
When mixing portion size in the convey materials and surpass the material of 300mm, long-play makes these materials built on stilts in some areas easily, form fatal weakness, hinder advancing of unclassified stores, and regulate vibrating motor to maximum speed increase disturbance force and also can't eliminate this situation, also can heighten the inclination angle that the height of lifting screw 18 increases hopper body 4, built on stilts zone is out of shape owing to the extruding that is subjected to the rear portion material and disturbance, thereby the destruction stress balance reaches the purpose of elimination " bridge formation " phenomenon.
The following most preferred embodiment that describes living beings (the containing stalk) distributing device of changeable trough obliquity of the present invention and oscillation frequency and amplitude with reference to Fig. 1～5 in detail.
The material that this embodiment handles is soft stalk-rice straw, is of a size of 0～300mm behind the pretreatment.The stalk material is from feed bin import 1 input at middle feed bin 2 tops, and free fall is to the depiler of feed bin bottom then.Depiler is made of side by side 4 hopper bodies 4, the long 4.5m of each hopper, and wide 1.2m, circular edges radius 0.4m, 38 ° of arc chord angles all are equipped with independently vibration, lifting and spring supporting mechanism simultaneously.Be connected by canvas 3 between hopper body 4 and bulkhead and hopper and the hopper, can play the effect of sealants and absorption portion vibration like this; Simultaneously, canvas leaves sufficient expansion space, can satisfy the independent rotation of each hopper thus again.
Lifting mechanism adopts vertical frequency control cycloidal-pin wheel retarder (as the BL type), specified output speed is 0～136r/min, can accurately be positioned to the appointment rotating speed by frequency control, miniature gears 23 is 1: 5 with the diameter ratio of big gear wheel 21, and lifting screw 18 diameters are 50mm, pitch is 20mm, like this, under motor drove indirectly, lifting screw 18 can move up and down 0～545mm, thereby drive hopper body 4 freely rotates around spring cupport structure 11, and inclination alpha can change between 48～80 °.
Before the sub-material, regulate lifting mechanism 8, the inclination angle that makes hopper body 4 is 55 °, and like this, when solid accumulation during to the 2.4m height, whole distributing device approximately can hold 2.5 tons of materials.During sub-material, open vibrating motor 9, at this moment, material moves to bin outlet 12 along the hopper length direction under the disturbance force that vibrating motor 9 produces.Vibrating motor adopts frequency control vibrating motor (as the JZO vibrating motor), and speed can change at 0～1440r/min.During low speed, cell body produces low frequency and vibrates by a narrow margin, and sub-material speed is low; During high speed, cell body produces the vibration of high frequency high-amplitude, sub-material speed height.
Claims (6)
1. the biomass feed divider of a changeable trough obliquity and oscillation frequency and amplitude, it is characterized in that this device is arranged in juxtaposition by one or more independently feeding distribution mechanisms forms, and each feeding distribution mechanism mainly comprises hopper body (4), vibrating mechanism (9), lifting mechanism (8), spring supporting mechanism (11) and auxiliary mechanism; Hopper body (4) is inclined to set and is supported by the lifting mechanism (8) at the spring supporting mechanism (11) of front portion and rear portion, and vibrating mechanism (9) is arranged at hopper body (4) middle part at the end, is connected by canvas (3) between the front portion of hopper body (4) and the bulkhead.
2. the biomass feed divider of a kind of changeable trough obliquity according to claim 1 and oscillation frequency and amplitude is characterized in that described hopper body (4) bottom land is a planar shaped, and width is W; Trough rim is a circular arc, and radius R is 0.1～0.2W, and arc chord angle β is 25～58 °, and circular arc trough rim and planar shaped bottom land plane are tangent.
3. the biomass feed divider of a kind of changeable trough obliquity according to claim 1 and oscillation frequency and amplitude is characterized in that described lifting mechanism (8) is made up of outer sleeve (13), spring (14), slide block (15), inner core (16), nut (17), lifting screw (18), conical bearing (19), bearing seat (20), big gear wheel (21), vertical frequency control retarder (22), coupler (23), miniature gears (24) and support (25); Wherein, vertical frequency control retarder (22) is fixed on the support (25), mouth links to each other with miniature gears (24) by coupler (23), two big gear wheels (21) that match are arranged in the left and right sides, and be clipped in place in the bearing seat (19) up and down between two conical bearings (20); The lifting screw (18) that passes big gear wheel (21) center and match is on the one hand by being fixed in the location of two nuts (17) up and down of inner core (16), on the other hand by slide block (15) support spring (14); Outer sleeve (13) is enclosed within spring (14) and inner core (16) outside.
4. the biomass feed divider of a kind of changeable trough obliquity according to claim 1 and oscillation frequency and amplitude is characterized in that described spring supporting mechanism (11) is made up of outer sleeve (26), spring (27), inner core (28) and support (29); Inner core (28) is fixed on the support (29), and spring (27) is placed in one, and outer sleeve (26) is enclosed within spring (27) and inner core (28) outside.
5. the biomass feed divider of a kind of changeable trough obliquity according to claim 1 and oscillation frequency and amplitude is characterized in that described vibrating motor (9) is arranged off-centre, departs from hopper body (4) line of centers 1/6W～1/4W.
6. the biomass feed divider of a kind of changeable trough obliquity according to claim 1 and oscillation frequency and amplitude is characterized in that the inclination angle variation range of the described hopper body (4) that is inclined to set is 48～80 °.
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Application publication date: 20091230 Assignee: SINOMA INTERNATIONAL ENGINEERING Co.,Ltd. Assignor: SOUTHEAST University Contract record no.: X2022980006908 Denomination of invention: A biomass distributing device capable of changing the inclination angle, vibration frequency and amplitude of the chute Granted publication date: 20120411 License type: Common License Record date: 20220601 |