CN106742846A - The method for designing of granular material silo gasification system - Google Patents
The method for designing of granular material silo gasification system Download PDFInfo
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- CN106742846A CN106742846A CN201611204325.7A CN201611204325A CN106742846A CN 106742846 A CN106742846 A CN 106742846A CN 201611204325 A CN201611204325 A CN 201611204325A CN 106742846 A CN106742846 A CN 106742846A
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- silo
- fluidized bar
- fluidized
- discharging opening
- bar
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
- B65D88/72—Fluidising devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
- B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
Abstract
The invention belongs to silo construction field, more particularly to a kind of method for designing of granular material silo gasification system.Including following effective procedure：A, diameter, discharging opening number and purposes that silo is determined first；B, then, it is determined that need construction fluidized bar surface area；C, determine fluidized bar needed for air consumption；D, then, it is determined that the radius size of main air supply pipe；E, determine that each discharge outlet need to install the length of fluidized bar；F, last, the overall length of the fluidized bar according to each discharging opening, fluidized bar is arranged in discharging opening.The present invention is by providing a kind of method for designing of granular material silo gasification system, corresponding computing formula is combined using scientific and reasonable method for designing, air consumption needed for whole silo is effectively determined, for the design of silo provides technical guarantee, avoid the problem that tradition designs existing refitting or the wasting of resources carelessly, resource is saved, production cost has been reduced, it is ensured that the interests of enterprise.
Description
Technical field
The invention belongs to silo construction field, more particularly to a kind of method for designing of granular material silo gasification system.
Background technology
Silo is mainly used in the industries such as chemical industry, grain, feed, building materials.As country is to the height weight in energy-conserving and environment-protective field
There is extensive market depending on, silo and wide for prospect.The quality of the blunt reversed Practical Performance for mirroring silo of unstowing, be
The main performance index of silo.When silo discharging is worse off, material stock is cumulative on the contrary in storehouse, increase and the discharging of buildup
Slow down and cause silo effectively to fluidize volume reducing, cause the rate of unstowing low.Rate of unstowing is low not only to make silo can not play good
Discharging effect, also causes the economic benefit reduction that silo is utilized.
Material tonnage is bigger than normal in silo, when material position is too high, increases material compacting degree, and bottom of the reservior is increased by storage thing pressure,
Material presses bottom of the reservior, fluidizing performance reduction.If long-time storage is not carried out to material activating, material in storehouse is caused to kill, it will
Difficulty is caused to discharging.The discharging of large silo and homogenizing, be unable to do without the fluidizer that silo bottom is installed.The homogenizing of fluidizer
It is the key of silo discharging.The air gushed using fluidizer is stirred to granular material, and " leakage is produced under gravity
Bucket effect ", cutting multilayer charge level of being tried one's best when making powder state granular material drop downwards is allowed to be sufficiently mixed.Using different fluidisations
Air, makes parallel charge level in silo that fluidisation expansion of different sizes, some zone levelling dischargings, some region stream to occur
Change, so that charge level produces inclination in silo, and then material is radially homogenized the purpose that mixing reaches smooth discharging.
And the use of fluidizer, gasification system is be unable to do without, however, current existing silo is in gasification system is designed,
All being often the experience according to workmen is judged, lack effective scientific basis, this is resulted in has built in silo
Cheng Hou, probably due to the rectification again that causes of air consumption deficiency or air consumption are excessive, the wasting of resources for causing, therefore, urgently
A kind of rational method for designing of demand makes the gasification system of silo under minimum cost, reaches optimal gasification result, it is to avoid
The waste of resource and the complicated construction rectified and improved again.
The content of the invention
The present invention is designed for the silo gasification system of above-mentioned shortage science, it is proposed that a kind of method is simple, science has
Imitate and construction can be reduced, reach the method for designing of the granular material silo gasification system of optimal gasification result.
In order to achieve the above object, the technical solution adopted by the present invention is that the present invention provides a kind of granular material silo gas
The method for designing of change system, including following effective procedure：
A, diameter, discharging opening number and purposes that silo is determined first；
B, then, it is determined that need construction fluidized bar surface area, determine that formula is：
Wherein, SLThe surface area of the fluidized bar constructed for needed for silo, SJIt is the cross-sectional area of silo, d is straight for silo
Footpath, λ is gasification coefficient；
C, determine fluidized bar needed for air consumption, determine that formula is：
Wherein, QZIt is total air consumption of silo,It is fluidized bar surface air consumption, γ is pipeline air leakage coefficient；
D, then, it is determined that the radius size of main air supply pipe, determines that formula is：
Wherein, Rz is the radius of main air supply pipe, and v is the wind speed of main air supply pipe；
E, determine that each discharge outlet need to install the length of fluidized bar, determine that formula is：
Wherein, LlThe length of fluidized bar, r need to be installed for each discharge outletlIt is the radius of fluidized bar, n is silo discharging opening
Number；
F, last, the overall length of the fluidized bar according to each discharging opening, fluidized bar is arranged in discharging opening.
Preferably, in the f steps, the method for arranging of fluidized bar is：In two centre bits of relative edge of discharging opening
One fluidized bar of each setting in place is put, fluidized bar is vertically arranged with the side of discharging opening, then, in being with the fluidized bar for first setting
The heart, left and right horizontal is evenly arranged fluidized bar, and 1m is spaced between adjacent fluidized bar, and fluidized bar is close to burden-guiding cone setting.
Compared with prior art, advantages and positive effects of the present invention are,
1st, it is of the invention by providing a kind of method for designing of granular material silo gasification system, using scientific and reasonable design
Method combines corresponding computing formula, the air consumption needed for whole silo is effectively determined, for the design of silo provides skill
Guarantee in art, it is to avoid tradition carelessly designs the problem of existing refitting or the wasting of resources, has saved resource, reduces life
Produce cost, it is ensured that the interests of enterprise, meanwhile, the inventive method is simple, effective, and suitable large-scale promotion is used.
Specific embodiment
In order to be more clearly understood that the above objects, features and advantages of the present invention, with reference to embodiment to this hair
It is bright to be described further.It should be noted that in the case where not conflicting, the feature in embodiments herein and embodiment can
To be mutually combined.
Many details are elaborated in the following description in order to fully understand the present invention, but, the present invention may be used also
To be implemented using other modes described here are different from, therefore, the present invention is not limited to the specific of specification described below
The limitation of embodiment.
Embodiment 1, the present embodiment provides a kind of method for designing of granular material silo gasification system
In the present embodiment, with need design an a diameter of 46m, as a example by 12 silos of discharging opening, the present embodiment institute
The silo of offer is used to store cement, and plan carries out dumping for material by the way of discharging is circulated.Explanation is needed herein
It is why to need first to determine the main application of silo, because holding different material, required fluidisation area is also different, with
As a example by cement, the pneumatization of the bottom of the reservior of cement silo need at least reach 15% (flyash pneumatization need to reach 20%) i.e. gas
Change area and account for the 15% of cement bunker cross section, guide taper reaches 30 °.According to practical experience, the cement steel of a diameter of 20m-80m
The pneumatization in plate storehouse is reasonable when reaching 25%, therefore in design, first has to determine the purposes of this silo.
After some essential informations for determining silo, you can implementation is specifically devised, in order to reach 25% gasification
Area, therefore, the surface area of the fluidized bar of needs construction will be determined first, determine that formula is：
Wherein, SLThe surface area of the fluidized bar constructed for needed for silo, SJIt is the cross-sectional area of silo, d is straight for silo
Footpath, λ is gasification coefficient, by above-mentioned information it is recognised that the silo cross-sectional area designed needed for the present embodiment is SJ=
1661.06m2(π takes 3.14), λ is 0.25 (pneumatization needed for i.e.), by can be calculated：SL=415.265m2。
The surface area of the fluidized bar constructed according to needed for the silo for determining, it is possible to determine in silo needed for fluidized bar
Air consumption, determines that formula is：
Wherein, QZIt is total air consumption of silo,It is fluidized bar surface air consumption, γ is pipeline air leakage coefficient, in this implementation
In example, fluidized bar using perforated area account for whole fluidized bar surface area 3/4ths (surface area of single fluidized bar with above
The surface area concept of described fluidized bar is different), therefore in the present embodiment,Value is 0.73m3/(m2Min), pipeline
According to actual duct survey, in the present embodiment, γ is 1.2 to air leakage coefficient, and QZ=363.772m can be obtained by calculating3/
(m2·min)。
Then the radius size of main air supply pipe is assured that, determines that formula is：
Wherein, Rz is the radius of main air supply pipe, and v is the wind speed of main air supply pipe, according to actual needs, the wind speed of main air supply pipe
V=8m/s~35m/s, in the present embodiment, chooses wind speed 25m/s, because the present embodiment is carried out by the way of discharging is circulated
Material is dumped, therefore, main air supply pipe is only for a discharging opening, accordingly, it would be desirable to total air consumption is carried out into 12 deciles,
Be can be calculated according to above formula, Rz=80mm, i.e., the main a diameter of 160mm of steam line, the unit of the wind speed that should be noted herein
It is the second, and total air consumption is in units of minute, it is therefore desirable to carry out the conversion of correlation.
Finally, determine that each discharge outlet need to install the length of fluidized bar, determine that formula is：
Wherein, LlThe length of fluidized bar, r need to be installed for each discharge outletlIt is the radius of fluidized bar, n is silo discharging opening
Number, at present, in the market fluidized bar specification is mainly two kinds of DN40, DN50, in the present embodiment, as a example by DN40 fluidized bars make
It is that the radius of vaporization element in storehouse, i.e. fluidized bar is 24mm, in the present embodiment, the number of discharging opening is 12, therefore, calculate
LlLength be 229.6m.
It is last just fluidized bar to be arranged in discharging opening according to the overall length of the fluidized bar of each discharging opening, go out
Material mouth is foursquare mouth, and the method for arranging of fluidized bar is two center positions of the relative edge respectively setting one in discharging opening
Fluidized bar is set on the opposite side of fluidized bar, i.e. discharging opening, and fluidized bar is vertically arranged with the side of discharging opening, is then close to fluidized bar
Burden-guiding cone is set, and is so assured that first length of fluidized bar, and the length of first fluidized bar is to be close to discharging opening
It is the end of fluidized bar, upwardly extends, extends close to burden-guiding cone top 20cm or so, then stream again first to set
Change centered on rod, left and right horizontal is evenly arranged fluidized bar, and 1m is spaced between adjacent fluidized bar, because the face of burden-guiding cone is inverted
Trapezoidal setting, therefore, the length of each fluidized bar is differed, and this needs to determine preferably based on actual burden-guiding cone, works as phase
To two sides fluidized bar all arrange after, the face on remaining two sides is then arranged again, method is the same, this
In embodiment, by after calculating, fluidized bar arranges two faces.
Say above, this silo will carry out dumping for material, i.e. any time section only by the way of discharging is circulated
There is a discharging opening discharging again, in this case, it is necessary to introduce bronchus, main steam line is connected with fluidized bar, in this reality
Apply in example, be divided into 2 gasification zones, therefore, the air consumption needed for each gasification zone is QZ/ 12/2=15.15m3/(m2·
Min), so, calculated according to the wind speed of 25m/s, bronchial radius can be obtained for 43mm, therefore, from the branch of a diameter of 90mm
Tracheae, so, main air supply pipe connects bronchus, and bronchus connects fluidized bar again.
Embodiment 2, the present embodiment provides a kind of method for designing of granular material silo gasification system
In the present embodiment, with need design an a diameter of 60m, 6 discharging openings, as a example by 3 silos of gallery, this reality
Applying the silo that example provided is used to store flyash, and plan is by the way of 3 discharging openings carry out discharging simultaneously in three gallerys
Carry out dumping for material.Herein it should be noted that why needing first to determine the main application of silo, because holding difference
Material, required fluidisation area is also different, and flyash pneumatization need to reach 20% i.e. pneumatization, and to account for flyash storehouse transversal
The 20% of face, guide taper reaches 30 °, therefore in design, first has to determine the purposes of this silo.
After some essential informations for determining silo, you can implementation is specifically devised, in order to reach 20% gasification
Area, therefore, the surface area of the fluidized bar of needs construction will be determined first, determine that formula is：
Wherein, SLThe surface area of the fluidized bar constructed for needed for silo, SJIt is the cross-sectional area of silo, d is straight for silo
Footpath, λ is gasification coefficient, by above-mentioned information it is recognised that the silo cross-sectional area designed needed for the present embodiment is SJ2826m2
(π takes 3.14), λ is 0.20 (pneumatization needed for i.e.), by can be calculated：SL=565.2m2。
The surface area of the fluidized bar constructed according to needed for the silo for determining, it is possible to determine in silo needed for fluidized bar
Air consumption, determines that formula is：
Wherein, QZIt is total air consumption of silo,It is fluidized bar surface air consumption, γ is pipeline air leakage coefficient, in this implementation
In example, fluidized bar using perforated area account for whole fluidized bar surface area 3/4ths (surface area of single fluidized bar with above
The surface area concept of described fluidized bar is different), therefore in the present embodiment,Value is 0.73m3/(m2Min), pipeline
According to actual duct survey, in the present embodiment, γ is 1.2 to air leakage coefficient, and Q can be obtained by calculatingZ=495.115m3/
(m2·min)。
Then the radius size of main air supply pipe is assured that, determines that formula is：
Wherein, Rz is the radius of main air supply pipe, and v is the wind speed of main air supply pipe, according to actual needs, the wind speed of main air supply pipe
V=8m/s~35m/s, in the present embodiment, chooses wind speed 30m/s, by can be calculated, Rz=290mm, i.e., main steam line
A diameter of 600mm.
Finally, determine that each discharge outlet need to install the length of fluidized bar, determine that formula is：
Wherein, LlThe length of fluidized bar, r need to be installed for each discharge outletlIt is the radius of fluidized bar, n is silo discharging opening
Number, at present, in the market fluidized bar specification is mainly two kinds of DN40, DN50, in the present embodiment, as a example by DN40 fluidized bars make
It is that the radius of vaporization element in storehouse, i.e. fluidized bar is 24mm, in the present embodiment, the number of discharging opening is 6, therefore, calculate
LlLength be 625m.
It is last just fluidized bar to be arranged in discharging opening according to the overall length of the fluidized bar of each discharging opening, go out
Material mouth is foursquare mouth, and the method for arranging of fluidized bar is two center positions of the relative edge respectively setting one in discharging opening
Fluidized bar is set on the opposite side of fluidized bar, i.e. discharging opening, and fluidized bar is vertically arranged with the side of discharging opening, is then close to fluidized bar
Burden-guiding cone is set, and is so assured that first length of fluidized bar, and the length of first fluidized bar is to be close to discharging opening
It is the end of fluidized bar, upwardly extends, extends close to burden-guiding cone top 20cm or so, then stream again first to set
Change centered on rod, left and right horizontal is evenly arranged fluidized bar, and 1m is spaced between adjacent fluidized bar, because the face of burden-guiding cone is inverted
Trapezoidal setting, therefore, the length of each fluidized bar is differed, and this needs to determine preferably based on actual burden-guiding cone, works as phase
To two sides fluidized bar all arrange after, the face on remaining two sides is then arranged again, method is the same, this
In embodiment, by after calculating, fluidized bar arranges four faces.
Say above, this silo will carry out carrying out thing by the way of discharging simultaneously using 3 discharging openings in three gallerys
That expects dumps, therefore, the layout of pipeline should be main air supply pipe, one-level bronchus (air supply pipe in each gallery), two grades of branch
Tracheae (steam line of each guide conical surface), the layout type of fluidized bar, therefore, required air consumption is in each gallery
QZ/ 6=82.5m3/(m2Min), so, calculated according to the wind speed of 30m/s, the bronchial radius of one-level can be obtained for 110mm, because
This, from the one-level bronchus of a diameter of 220mm, then two grades of bronchial air consumptions are QZ=20.6m3/(m2Min), this
Sample, calculates according to the wind speed of 30m/s, can obtain two grades of bronchial radiuses for 60mm, therefore, from two grades of a diameter of 120mm
Bronchus.
The above, is only presently preferred embodiments of the present invention, is not the limitation for making other forms to the present invention, is appointed
What those skilled in the art changed possibly also with the technology contents of the disclosure above or be modified as equivalent variations etc.
Effect embodiment is applied to other fields, but every without departing from technical solution of the present invention content, according to technical spirit of the invention
Any simple modification, equivalent variations and the remodeling made to above example, still fall within the protection domain of technical solution of the present invention.
Claims (2)
1. a kind of method for designing of granular material silo gasification system, it is characterised in that including following effective procedure：
A, diameter, discharging opening number and purposes that silo is determined first；
B, then, it is determined that need construction fluidized bar surface area, determine that formula is：
Wherein, SLThe surface area of the fluidized bar constructed for needed for silo, SJIt is the cross-sectional area of silo, d is the diameter of silo, and λ is
Gasification coefficient；
C, determine fluidized bar needed for air consumption, determine that formula is：
Wherein, QZIt is total air consumption of silo,It is fluidized bar surface air consumption, γ is pipeline air leakage coefficient；
D, then, it is determined that the radius size of main air supply pipe, determines that formula is：
Wherein, Rz is the radius of main air supply pipe, and v is the wind speed of main air supply pipe；
E, determine that each discharge outlet need to install the length of fluidized bar, determine that formula is：
Wherein, LlThe length of fluidized bar, r need to be installed for each discharge outletlIt is the radius of fluidized bar, n is individual for silo discharging opening
Number；
F, last, the overall length of the fluidized bar according to each discharging opening, fluidized bar is arranged in discharging opening.
2. the method for designing of granular material silo gasification system according to claim 1, it is characterised in that the f steps
In, the method for arranging of fluidized bar is：In two center positions of relative edge of discharging opening, one fluidized bar, fluidized bar are respectively set
Side with discharging opening is vertically arranged, and then, centered on the fluidized bar for first setting, left and right horizontal is evenly arranged fluidized bar, phase
1m is spaced between adjacent fluidized bar, fluidized bar is close to burden-guiding cone setting.
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| EP2236438A1 (en) * | 2009-04-01 | 2010-10-06 | FLSmidth Möller GmbH | Silo for storing dust-like or granular bulk material |
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