CN103818726A - Dense-phase conveying pipeline for high-concentration powder - Google Patents
Dense-phase conveying pipeline for high-concentration powder Download PDFInfo
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- CN103818726A CN103818726A CN201410098521.5A CN201410098521A CN103818726A CN 103818726 A CN103818726 A CN 103818726A CN 201410098521 A CN201410098521 A CN 201410098521A CN 103818726 A CN103818726 A CN 103818726A
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Abstract
The invention relates to a novel coaxial multi-passage powder conveying special-shaped pipeline which is composed of an outer pipe, a middle pipe, an inner pipe, an air baffling device with a baffling groove, and a wedge-shaped positioning block. High-concentration powder is pushed into the inner pipe through conveying carrying air, air film air enters a film-forming passage through the outer pipe and large holes, the direction of the air film air is corrected through the air baffling device, then the air film air enters the inner pipe through small holes and forms an air film with certain thickness near the wall of the inner pipe, and the conveying carrying air, the air film air and the high-concentration powder are converged in the inner pipe and are conveyed to a downstream work section in a slurry state under the stirring action of the air.
Description
[technical field]
The invention belongs to field of mechanical technique.More specifically, the present invention relates to the close particular pipe of carrying mutually of a kind of powder high concentration.
[background technology]
The various pipelines of commercial operation at present, the overwhelming majority only limits to carry continuous phase fluid, there is no well can carry the pipeline of the dispersed phase fluid with fluidisation character, such as powder material.Some production units are carried fluidised powder by common pipe common on market simply; raw material drying degree requires high; particle size distribution is little; the impact of the unfavorable factor such as obstruction, wearing and tearing, static is larger, in a short time, short range dilute phase also carries and support reluctantly, but hard to carry on for the close conveying mutually of long distance cycle high concentration; mainly that conveying pipe obstruction is very serious; restricted the large-scale production of enterprise, running cost is high, and profit margin also reduces relatively.
What Shang Ci field, domestic and international market was conventional at present is two sleeve pipes, can realize the long distance of extensive long period carries, be applied to some power plant more, cement mill etc., it is the powder conveying pipeline product of comparative maturity, but also easily occur stopping up, the phenomenons such as wearing and tearing, dredge stifled difficulty, such as the powder material such as Power Plant Ash and cement particle is thin, operational throughput is large, the dry phenomenons such as pipe choking that very easily occur not in place, once stop up, time and effort consuming, affecting widely enterprise normally produces, in addition, powder to the pollution of environment easily and attachment be solidified togather and be difficult to remove, harm time length is long, especially very large to powder industry practitioner actual bodily harm, even threat to life, particularly in the last few years, environmental problem day by day serious, the dust that powder produces is the arch-criminal who causes haze weather, harm is large, be difficult in a short time administer and eliminate, greatly affect on-site human settlement.The effective means of administering dust pollution is exactly dustproof, and production and transport process are strictly airtight.
Administering dust pollution is a great people's livelihood engineering, write in the programmatic policy document of the Chinese government, need several generations' effort as the elimination of dust contamination of one of source of pollution, and to constantly carry out scientific and technical innovation, develop advanced powder equipment, create the closed environment of power production processing, eliminate dust pollution from source, eliminate the blockage problem in powder transport process, not only to rely on powder conveying equipment to pressurize from source, the behaves such as fluidisation are eliminated, also to set about from conveying pipe simultaneously, alleviate friction, the generation of the latch up phenomenons such as bridge formation, and can distribute and determine pipeline specifications according to powder granularity to be conveyed, applied range, stop up and eliminate thoroughly, meeting enterprise's long period produces.
The angle that the present invention transports from powder, powder transport process in pipeline is slurry state shape, gas powder mixes and strength stirs, high and the powder of gas-solid mixing logistics fluidization degree and pipeline enclosure have gas lubrication, have solved the pipe choking of powder transport process, have avoided dismantling anywhere or anytime and installing the powder causing and have polluted, also solve that powder long period is smooth and easy to be transported simultaneously, and auxiliary realize that powder is with pressure to be transported, dock with powder conveying equipment well, complete long distance and transport without obstruction.
[summary of the invention]
[technical matters that will solve]
The object of this invention is to provide the close particular pipe of carrying mutually of a kind of high concentration powder.
[technical scheme]
The present invention relates to the close phase delivery duct of a kind of high concentration powder.
This delivery duct is by outer tube 1, intermediate pipe 2, inner tube 3, form with gas baffling device 4 and the wedge locating block 5 of baffling groove, wherein form an air film gas passage 6 by outer tube 1 and intermediate pipe 2, and forming a film forming channel 7 by intermediate pipe 2 and inner tube 3, inner tube 3 is high concentration powder and delivery of carrier gas passage;
Distance between outer tube 1 inwall and the outer ancient piece of jade, round, flat and with a hole in its centre of intermediate pipe 2 is Ф
1, the distance between intermediate pipe 2 inwalls and the outer ancient piece of jade, round, flat and with a hole in its centre of inner tube 3 is Ф
2, the internal diameter of inner tube 3 is Ф
3, wherein Ф
1=Ф
2/ 3, Ф
3=3 Ф
2;
On intermediate pipe 2 tube walls, be uniformly distributed the macropore 8 of pitch of holes m and aperture D, on inner tube 3 tube walls, be uniformly distributed the aperture 9 of pitch of holes n and aperture d, wherein m=250D, n=250d, D=2d, d=0.8 μ, μ is the smallest particles diameter of high concentration powder;
First air film gas enter air film gas passage 6, then enter film forming channel 7 directive gas baffling device 4 summits by macropore 8, the baffling groove of flowing through again, air film gas makes correction for direction through gas baffling device 4, the adjacent air film entraining air stream being folded to crosses and enters in inner tube 3 in aperture 9, form the air film that thickness is δ at the inner tube nearly wall of 3 inwall place, described high concentration powder is lifted lower and be transported to upstream device with slurry state shape under delivery of carrier gas promotes at air film in inner tube 3.
A preferred embodiment of the invention, α=0, baffling angle of described gas baffling device 4 °～60 °.
According to another kind of preferred implementation of the present invention, described air-film thickness δ=2.0～6.0mm.
According to another kind of preferred implementation of the present invention, described delivery of carrier gas and air film gas carry the flow mass M of powder to be determined by following formula:
M=πρνФ
3 2/4
In formula:
ρ represents powder density, kg/m
3,
ν represents powder flow rate 5.0～12.0m/s,
π is circular constant,
Ф
3represent inner tube 3 internal diameters, mm.
According to another kind of preferred implementation of the present invention, described delivery of carrier gas and air film gas phase with or different, be selected from air, at realm of nature non-combustible or not combustion-supporting gas or be transferred non-combustible gas that powder do not react or combustion-supporting gas not.
According to another kind of preferred implementation of the present invention, described non-combustible or not combustion-supporting gas be one or more gases that are selected from nitrogen, carbon dioxide, argon gas or overheated steam; Described be transferred non-combustible gas that powder do not react or not combustion-supporting gas be one or more gases that are selected from nitrogen, carbon dioxide, argon gas or overheated steam.
According to another kind of preferred implementation of the present invention, described outer tube 1, intermediate pipe 2 or inner tube 3 use metals, synthetic material or preformed material are made.
According to another kind of preferred implementation of the present invention, between described outer tube 1, intermediate pipe 2 and inner tube 3, wedge locating block 5 is set.
According to another kind of preferred implementation of the present invention, described wedge locating block 5 use metals, pottery, synthetic material or preformed material are made.
According to another kind of preferred implementation of the present invention, described gas baffling device 4 is evenly distributed on the point midway of 9 of adjacent apertures, and line and the tube wall of gas baffling device 4 center-points and macropore 8 center-points are perpendicular.
Below in conjunction with accompanying drawing, the present invention is illustrated.
The close structural representation of carrying mutually particular pipe of high concentration powder of the present invention is listed in accompanying drawing 1.This delivery duct is by outer tube 1, intermediate pipe 2, inner tube 3, form with gas baffling device 4 and the wedge locating block 5 of baffling groove, wherein form an air film gas passage 6 by outer tube 1 and intermediate pipe 2, and forming a film forming channel 7 by intermediate pipe 2 and inner tube 3, inner tube 3 is high concentration powder and delivery of carrier gas passage.Distance between outer tube 1 inwall and the outer ancient piece of jade, round, flat and with a hole in its centre of intermediate pipe 2 is Ф
1, the distance between intermediate pipe 2 inwalls and the outer ancient piece of jade, round, flat and with a hole in its centre of inner tube 3 is Ф
2, the internal diameter of inner tube 3 is Ф
3, wherein Ф
1=Ф
2/ 3, Ф
3=3 Ф
2.On intermediate pipe 2 tube walls, be uniformly distributed the macropore 8 of pitch of holes m and aperture D, on inner tube 3 tube walls, be uniformly distributed the aperture 9 of pitch of holes n and aperture d, wherein m=250D, n=250d, D=2d, d=0.8 μ, μ is the smallest particles diameter of high concentration powder.
The annular space spacing that air film gas enters between outer tube 1 inwall and the outer ancient piece of jade, round, flat and with a hole in its centre of intermediate pipe 2 of particular pipe is Ф
1air film gas passage 6, then via hole diameter is that the annular space spacing that macropore 8 that D, pitch of holes are m enters between intermediate pipe 2 inwalls and the outer ancient piece of jade, round, flat and with a hole in its centre of inner tube 3 of particular pipe is Ф
2 film forming channel 7, the baffling groove of flowing through again behind air film gas directive gas baffling device 4 summits, after gas baffling device 4 makes correction for direction, the adjacent air film entraining air stream being folded to is that aperture 9 places that d, pitch of holes are n cross and enter internal diameter in aperture is Ф
3 inner tube 3, and form the air film that thickness is δ at the nearly wall place of inner tube 3 inwalls, delivery of carrier gas pushes the high concentration powder coming and enters inner tube 3 under air film is lifted, under delivery of carrier gas promotes and under all kinds of Gas Stirring with slurry state shape fed downstream equipment.
The close aperture of particular pipe and the gas baffler relative position figure of carrying mutually of high concentration powder of the present invention lists in accompanying drawing 2.The macropore 8 that air film gas via hole diameter is D enters air film gas passage 6, and after gas baffling device 4 makes correction for direction, is that the aperture 9 of d enters inner tube 3 through aperture, and forms at the inner tube nearly wall of 3 inwall place the air film that thickness is δ.
The close macropore of particular pipe and the aperture relative position figure of carrying mutually of high concentration powder of the present invention lists in accompanying drawing 3.Wherein scheme that a has illustrated on intermediate pipe 3 walls, adjacent spacing is the macropore 8 that m, aperture are D.Figure b has illustrated on inner tube 3 walls, adjacent spacing is the aperture 9 that n, aperture are d.
Described macropore 8 has following interrelation with described aperture 9:
M=250D, n=250d, D=2d, d=0.8 μ, μ is the smallest particles diameter of high concentration powder.
Described gas baffling device constructional drawing is listed in accompanying drawing 4, wherein schemes the front view that a is gas baffling device 4, and it is curved surface pyramid.Figure b is the left view of gas baffling device 4, and has shown baffling angle α and baffling groove.α=0, baffling angle of described gas baffling device 4 °～60 °.Described gas baffling device 4 is evenly distributed on the point midway of 9 of adjacent apertures, and line and the tube wall of gas baffling device 4 center-points and macropore 8 center-points are perpendicular.
The close particular pipe of carrying mutually of high concentration powder of the present invention is to realize as follows conveying powdery material:
First air film gas enter air film gas passage 6, then enter by macropore 8 the baffling groove of flowing through again behind film forming channel 7 directive gas baffling device 4 summits, air film gas makes correction for direction through gas baffling device 4, the adjacent air film entraining air stream being folded to crosses and enters in inner tube 3 in aperture 9, form the air film that thickness is δ at the inner tube nearly wall of 3 inwall place, described high concentration powder is lifted lower and be transported to upstream device with slurry state shape under delivery of carrier gas promotes at air film in inner tube 3.
[beneficial effect]
Described in of the present invention, there is following beneficial effect:
1, for the close particular pipe of carrying mutually of high concentration powder of the present invention, powder granularity to be conveyed has a very wide distribution, powder kind to be conveyed is many, the large I of powder channel diameter is carried out fabrication design according to user's material to be transported material granularity distribution size, all kinds of apertures and the design of gas baffler also can require to design according to user, and design capacity is large.
2,, for the close particular pipe of carrying mutually of high concentration powder of the present invention, can select safety and the most suitable carrier gas of economy according to the physicochemical property of user's powder to be conveyed.
3,, for the close particular pipe of carrying mutually of high concentration powder of the present invention, it manufactures material can select safety and the most suitable manufactured materials of economy according to the physicochemical property of user's powder to be conveyed.
[accompanying drawing explanation]
Fig. 1 is the close particular pipe structural representation of carrying mutually of high concentration powder of the present invention;
Fig. 2 is close particular pipe aperture and the gas baffler relative position schematic diagram carried mutually of high concentration powder of the present invention;
Fig. 3 is close macropore and the aperture relative position schematic diagram of carrying mutually particular pipe of high concentration powder of the present invention;
Fig. 4 gas baffling device structural representation.
In figure:
1-outer tube; 2-intermediate pipe; 3-inner tube; 4-gas baffling device; 5-wedge locating block; 6-air film gas passage; 7-film forming channel; 8-macropore; 9-aperture.
[specific embodiment]
Embodiment will be described in further detail the present invention in conjunction with this Figure of description below.
Embodiment 1: raw material: fine coal, nitrogen.
The present embodiment adopts screw feeder to carry the fine coal raw material grinding, and be sent to hold tank and store, traffic capacity 2000.0kg/h, normal pressure, fine coal, nitrogen and particular pipe parameter are as follows:
Table 1: raw material parameter list
Table 2 particular pipe parameter
Screw feeder feed opening connects particular pipe, and particular pipe connects hold tank, and air film gas and delivery of carrier gas are served as by nitrogen.
Nitrogen enters particular pipe Ф
1the air film gas passage of=1.50mm, the macropore of via hole diameter D=0.12mm, pitch of holes m=24.0mm enters Ф afterwards
2the film forming channel of=4.0mm, nitrogen directive is arranged on the baffling groove of flowing through again behind the summit of the gas baffling device on film forming channel tube wall, and it is Ф that the aperture that is n=12.0mm by aperture d=0.06mm, pitch of holes after being made correction for direction by the gas baffling device at ° baffling angle, α=30 enters internal diameter
3the inner tube of=12.0mm, and form the air film of thickness δ=2.0mm at the nearly wall of inner tube place, the fine coal that nitrogen is sent here enters Ф
3the inner tube of=12.0mm, in inner tube, fine coal is with slurry state shape fed downstream hold tank under nitrogen air film is lifted, under nitrogen promotes and stirs, and nitrogen is concentrated safely and is unloaded and put at hold tank.
Embodiment 2: raw material: medicinal powder, carbon dioxide.
The present embodiment adopts pressurized tank to carry the powder raw material grinding, and is sent to manufacturing line, traffic capacity 500.0kg/h, and normal pressure, medicinal powder, carbon dioxide and particular pipe parameter are as follows:
Table 3: raw material parameter list
Table 4: particular pipe parameter
Pressurized tank feed opening connects particular pipe, and particular pipe connects manufacturing line leakproof tank, and air film gas and delivery of carrier gas are served as by carbon dioxide.
Carbon dioxide enters particular pipe Ф
1the air film gas passage of=3.0mm, the macropore of via hole diameter D=0.30mm, pitch of holes m=58.0mm enters Ф afterwards
2the film forming channel of=8.0mm, nitrogen directive is arranged on the baffling groove of flowing through again after the gas baffling device on film forming channel tube wall, and after being made correction for direction by the gas baffling device at ° baffling angle, α=45, entering internal diameter by the aperture of aperture d=0.15mm, pitch of holes n=29.0mm is Ф
3the inner tube of=20.0mm, and form the air film of thickness δ=2.0mm at the nearly wall of inner tube place, it is 20.0mm inner tube that the medicinal powder that carbon dioxide is sent here enters internal diameter, in inner tube, medicinal powder is with slurry state shape fed downstream manufacturing line under carbon dioxide air film is lifted, under carbon dioxide gas promotes and stirs, and carbon dioxide is concentrated safely and unloaded and put at the leakproof tank of manufacturing line.
Claims (10)
1. the close phase delivery duct of high concentration powder, it is characterized in that this delivery duct is by outer tube (1), intermediate pipe (2), inner tube (3), form with gas baffling device (4) and the wedge locating block (5) of baffling groove, wherein form an air film gas passage (6) by outer tube (1) and intermediate pipe (2), and forming a film forming channel (7) by intermediate pipe (2) and inner tube (3), inner tube (3) is high concentration powder and delivery of carrier gas passage;
Distance outside outer tube (1) inwall and intermediate pipe (2) between an ancient piece of jade, round, flat and with a hole in its centre is Ф
1, the distance outside intermediate pipe (2) inwall and inner tube (3) between an ancient piece of jade, round, flat and with a hole in its centre is Ф
2, the internal diameter of inner tube (3) is Ф
3, wherein Ф
1=Ф
2/ 3, Ф
3=3 Ф
2;
On intermediate pipe (2) tube wall, be uniformly distributed the macropore (8) of pitch of holes m and aperture D, on inner tube (3) tube wall, be uniformly distributed the aperture (9) of pitch of holes n and aperture d, wherein m=250D, n=250d, D=2d, d=0.8 μ, μ is the smallest particles diameter of high concentration powder;
First air film gas enter air film gas passage (6), then enter film forming channel (7) directive gas baffling device (4) summit by macropore (8), the baffling groove of flowing through again, air film gas makes correction for direction through gas baffling device (4), the adjacent air film entraining air stream being folded to crosses and enters in inner tube (3) in aperture (9), form the air film that thickness is δ at the nearly wall of inner tube (3) inwall place, described high concentration powder is lifted lower and be transported to upstream device with slurry state shape under delivery of carrier gas promotes at air film in inner tube (3).
2. delivery duct according to claim 1, is characterized in that α=0, baffling angle ° of described gas baffling device (4)～60 °.
3. delivery duct according to claim 1, is characterized in that described air-film thickness δ=2.0～6.0mm.
4. delivery duct according to claim 1, is characterized in that the flow mass M of described delivery of carrier gas and air film gas conveying powder is determined by following formula:
M=πρνФ
3 2/4
In formula:
ρ represents powder density, kg/m
3,
ν represents powder flow rate 5.0～12.0m/s,
π is circular constant,
Ф
3represent inner tube (3) internal diameter, mm.
5. delivery duct according to claim 1, it is characterized in that described delivery of carrier gas and air film gas phase with or different, be selected from air, at realm of nature non-combustible or not combustion-supporting gas or be transferred non-combustible gas that powder do not react or combustion-supporting gas not.
6. delivery duct according to claim 5, it is characterized in that described non-combustible or not combustion-supporting gas be one or more gases that are selected from nitrogen, carbon dioxide, argon gas or overheated steam; Described be transferred non-combustible gas that powder do not react or not combustion-supporting gas be one or more gases that are selected from nitrogen, carbon dioxide, argon gas or overheated steam.
7. delivery duct according to claim 1, outer tube (1), intermediate pipe (2) or inner tube (3) metal, synthetic material or preformed material described in it is characterized in that are made.
8. delivery duct according to claim 1, is characterized in that, between described outer tube (1), intermediate pipe (2) and inner tube (3), wedge locating block (5) is set.
9. delivery duct according to claim 1, wedge locating block (5) metal, pottery, synthetic material or preformed material described in it is characterized in that are made.
10. delivery duct according to claim 1, it is characterized in that described gas baffling device (4) is evenly distributed on the mid point point midway between adjacent aperture (9), and gas baffling device (4) revenue centre point is perpendicular with line and the tube wall of macropore (8) center-point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410098521.5A CN103818726A (en) | 2014-03-14 | 2014-03-14 | Dense-phase conveying pipeline for high-concentration powder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410098521.5A CN103818726A (en) | 2014-03-14 | 2014-03-14 | Dense-phase conveying pipeline for high-concentration powder |
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| CN103818726A true CN103818726A (en) | 2014-05-28 |
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|---|---|---|---|
| CN201410098521.5A Pending CN103818726A (en) | 2014-03-14 | 2014-03-14 | Dense-phase conveying pipeline for high-concentration powder |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105151793A (en) * | 2015-08-21 | 2015-12-16 | 天津宜诺医药工业设计有限公司 | Powder conveying pipe and conveying method thereof |
| CN109019032A (en) * | 2018-08-28 | 2018-12-18 | 张兴宇 | A kind of close phase compressed gas conveying device of terylene experimental branch line |
| CN109911629A (en) * | 2019-03-26 | 2019-06-21 | 大连理工大学 | A kind of novel anti-attached wall pneumatically conveyed pulverized fuel casing of powder |
| CN115108327A (en) * | 2022-08-01 | 2022-09-27 | 安徽理工大学 | Filling paste gas wrapping and transporting device with carbon sealing function |
| CN115849017A (en) * | 2022-12-02 | 2023-03-28 | 江西中烟工业有限责任公司 | Automatic pipeline air volume adjusting system and method |
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Cited By (5)
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| CN109019032A (en) * | 2018-08-28 | 2018-12-18 | 张兴宇 | A kind of close phase compressed gas conveying device of terylene experimental branch line |
| CN109911629A (en) * | 2019-03-26 | 2019-06-21 | 大连理工大学 | A kind of novel anti-attached wall pneumatically conveyed pulverized fuel casing of powder |
| CN115108327A (en) * | 2022-08-01 | 2022-09-27 | 安徽理工大学 | Filling paste gas wrapping and transporting device with carbon sealing function |
| CN115849017A (en) * | 2022-12-02 | 2023-03-28 | 江西中烟工业有限责任公司 | Automatic pipeline air volume adjusting system and method |
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Application publication date: 20140528 |
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