CN105114972A - Pulverized coal uniform conveying pipeline and equalizer - Google Patents
Pulverized coal uniform conveying pipeline and equalizer Download PDFInfo
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- CN105114972A CN105114972A CN201510511929.5A CN201510511929A CN105114972A CN 105114972 A CN105114972 A CN 105114972A CN 201510511929 A CN201510511929 A CN 201510511929A CN 105114972 A CN105114972 A CN 105114972A
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- pulverized coal
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Abstract
The invention discloses a pulverized coal uniform conveying pipeline and an equalizer. The pulverized coal uniform conveying pipeline comprises a primary pulverized coal conveying pipeline, the equalizer, a branch pipeline distributor and a plurality of branch pulverized coal conveying pipelines, wherein the tail end of the primary pulverized coal conveying pipeline is connected with the initial end of the equalizer by virtue of a sealing flange; the tail end of the equalizer is connected with the initial end of the branch pipeline distributor in a sealing mode; the plurality of the branch pulverized coal conveying pipelines are connected with the tail end of the branch pipeline distributor; an outer sleeve and a gas inlet of the primary pulverized coal conveying pipeline are utilized to blow air into the outer sleeve; meanwhile, gas holes are uniformly distributed in the periphery of an inner sieving tube, and the diameters of the gas holes are smaller than those of pulverized coal particles, so that the gas also enters the inner sieving tube for spraying and blowing the pulverized coal of the inner sieving tube, and the pulverized coal is re-sprayed to achieve a homogenization purpose; finally, by virtue of bifurcated pipes of the branch pipeline distributor, inner equalizing tubes are divided into a plurality of groups; each group of the inner equalizing tubes corresponds to a special-shape transition tube by virtue of the corresponding bifurcated pipe; along with the acting force of air blasting, the pulverized coal continuously flows forwards, and enters the branch pulverized coal conveying pipelines through a connecting tube, thereby completing divarication.
Description
Technical field
The present invention relates to coal dust conveying technology field, particularly relate to the even conveyance conduit of a kind of coal dust and divider.
Background technology
Power transportation pipe (also can be described as pulverized coal feed pipe, pulverized coal channel) is widely used in the production of chemical industry, metallurgy, power industry, mainly carries out for a long time various mealy solid particle with pneumatic conveying mode, the transport of large distance.Because pipe arrangement is easy to the restriction being subject to ambient conditions, inevitably need to install elbow additional in the place of pipeline turning and rising, decline, thus cause the distribution of powdered granule in pipeline very uneven, when needs carry out bifurcated process to pipeline, the distributing uniformity of the powdered granule after very difficult guarantee bifurcated between each branch pipe(tube).
In pulverized coal power boiler, the qualified coal dust that pulverized coal preparation system is mainly used in being ground by coal pulverizer is transported in each burner nozzle equably, make it be sprayed into uniformly in burner hearth by spout, this just requires to have good coal dust and allocation of the amount of air uniformity between each First air power transportation pipe of pulverized coal preparation system.Along with the increase of boiler controller system capacity, the maldistribution of pulverized coal preparation system breeze airflow directly affects the security and stability of boiler operatiopn.Whether the distribution of pulverized coal preparation system breeze airflow is evenly one of key factor determining Combustion Operation of Boilers quality, the primary air velocity of reasonable disposition each burner and coal powder density are the essential condition ensureing safe operation of the boiler, are also the preconditions that low NOx combusting technology is implemented smoothly.
At present, from coal pulverizer wind powder mixture out through multiple elbow of pulverized coal channel and Pipeline lift process, coal dust distribution in pulverized coal channel is very uneven, presents the phenomenon that coal dust concentrates on pulverized coal channel side, causes local coal powder density in pulverized coal channel too high.See Fig. 1, directly main pulverized coal feed pipe 01 is connected with a pulverized coal feed pipe 03 by bifurcated pipe 02 in prior art.The method of salary distribution of this simple employing bifurcated pipe 02, makes the coal dust of area with high mercury enter a certain pulverized coal feed pipe 03, and the coal dust of low concentration region enters another pulverized coal feed pipe 03, causes coal powder distribation uneven.
Summary of the invention
The object of this invention is to provide the even conveyance conduit of a kind of coal dust and divider, effectively coal dust can be assigned to equably in multiple branches coal chute, ensure that the uniformity of coal dust, improve work quality.
The technical solution used in the present invention is:
A kind of even conveyance conduit of coal dust and divider, comprise main pulverized coal feed pipe, divider, branch pipe(tube) distributor and multiple pulverized coal feed pipes, the end of main pulverized coal feed pipe connects the top of divider by sealing flange, the top of the end seal connecting branch road distributor of divider, the end of branch pipe(tube) distributor connects multiple pulverized coal feed pipes; Described main pulverized coal feed pipe comprises outer tube and interior screen casing, and the surrounding of outer tube is distributed with air admission hole, and interior screen casing surrounding is evenly distributed with pore, and hole diameter is less than pulverized coal particle diameter; Described divider comprises outer tube body, one piece of antistatic poly (methyl methacrylate) plate is fixed at the two-port place of outer tube body respectively, every block antistatic poly (methyl methacrylate) plate is evenly provided with multiple through hole, and through hole on two pieces of antistatic poly (methyl methacrylate) plates is symmetrical, connect by dividing equally the seal of tube in one between often pair of symmetrical through hole; Described branch pipe(tube) distributor comprises bifurcated pipe, special-shaped transition conduit and tube connector, the top of bifurcated pipe is connected to the end of divider, at least one piece of flow distribution plate is radially provided with in bifurcated pipe, bifurcated pipe cross section is divided equally by all flow distribution plates, arm together with often adjacent two halves flow distribution plate is formed with bifurcated tube wall, per pass arm connects the top of a tube connector by a special-shaped transition conduit, and the end of tube connector connects the top of a pulverized coal feed pipe.
Described air admission hole is connected with appendix.
The present invention utilizes outer tube and the air admission hole of main pulverized coal feed pipe, blow in outer tube, simultaneously, because interior screen casing surrounding is evenly distributed with pore, hole diameter is less than pulverized coal particle diameter, so gas also can enter interior screen casing, the coal dust of internal screen casing is jetted, the winding-up again of wind powder, reaches uniform object; When wind powder is blowed evenly before bifurcated, air-flow along air blast enters in divider, and the uniform pulverized coal conveying of recycling divider, finally by the bifurcated pipe of branch pipe(tube) distributor, interior being all in charge of is divided into many groups, is often all in charge of by the corresponding special-shaped transition conduit of bifurcated pipe in group; Now, be equivalent to by wind powder bifurcated, but also do not enter a pulverized coal feed pipe; Along with the active force of air blast, wind powder continues flow forward again, and enter a pulverized coal feed pipe by tube connector, bifurcated completes.
Accompanying drawing explanation
Fig. 1 is the prior art structural representation in background technology of the present invention;
Fig. 2 is structural representation of the present invention;
Fig. 3 is antistatic poly (methyl methacrylate) plate structural representation of the present invention;
Fig. 4 is bifurcated pipe schematic cross-section of the present invention.
Detailed description of the invention
As shown in Figure 1,2 and 3, the present invention includes main pulverized coal feed pipe 1, divider 2, branch pipe(tube) distributor 3 and multiple pulverized coal feed pipes 4, the end of main pulverized coal feed pipe 1 connects the top of divider 2 by sealing flange 5, the top of the end seal connecting branch road distributor 3 of divider 2, the end of branch pipe(tube) distributor 3 connects multiple pulverized coal feed pipes 4; Described main pulverized coal feed pipe 1 comprises outer tube 6 and interior screen casing 7, the surrounding of outer tube 6 is distributed with air admission hole, air admission hole is connected with appendix, appendix is connected with gas transmission equipment, for blowing in outer tube 6, simultaneously, because interior screen casing 7 surrounding is evenly distributed with pore, hole diameter is less than pulverized coal particle diameter, so gas also can enter interior screen casing 7, the coal dust of internal screen casing 7 is jetted.Operation like this, can blow unrest by coal dust, coal dust is distributed more even.Described divider 2 comprises outer tube body 8, one piece of antistatic poly (methyl methacrylate) plate 9 is fixed at the two-port place of outer tube body 8 respectively, every block antistatic poly (methyl methacrylate) plate 9 is evenly provided with multiple through hole 10, and through hole 10 on two pieces of antistatic poly (methyl methacrylate) plates 9 is symmetrical, be tightly connected by being all in charge of 11 in one between often pair of symmetrical through hole 10; Described branch pipe(tube) distributor 3 comprises bifurcated pipe 12, special-shaped transition conduit 13 and tube connector 14, the top of bifurcated pipe 12 is connected to the end of divider 2, at least one piece of flow distribution plate 15 is radially provided with in bifurcated pipe 12, bifurcated pipe 12 cross section is divided equally by all flow distribution plates 15, arm 16 together with often adjacent two halves flow distribution plate 15 is formed with bifurcated pipe 12 wall, per pass arm 16 connects the top of a tube connector 14 by a special-shaped transition conduit 13, and the end of tube connector 14 connects the top of a pulverized coal feed pipe 4.
Embodiments of the invention are described in detail below in conjunction with accompanying drawing:
As shown in Figure 2, main pulverized coal feed pipe 1 of the present invention can adopt full section permeability type or adopt segmentation permeability type, the resource that full section permeability type expends is more, in the specific implementation, segmentation permeability type can be adopted, ensure that section before bifurcated main pulverized coal feed pipe 1 can carry out the winding-up again of wind powder, reach uniform object.Have gap between outer tube 6 and interior screen casing 7, facilitate the flowing of gas.Because the granular size of coal dust is uneven, in the course of conveying of long distance, the wind-force be subject to is different, and this just causes oarse-grained coal dust and short grained coal dust to occur differentiating phenomenon.When coal dust runs into bifurcated, if directly carry out bifurcated, now wind coal is uneven, is directly affected during bifurcated, causes bifurcated uneven.So the present invention, before bifurcated, adopts the mode that segmentation is jetted again.
When wind powder is blowed evenly before bifurcated, air-flow along air blast enters in divider 2, the top of divider 2 of the present invention and end fix one piece of antistatic poly (methyl methacrylate) plate 9 respectively, antistatic poly (methyl methacrylate) plate 9 one aspect is the absorption preventing coal dust, is the effect played shunting and support on the other hand.When wind powder arrives herein, under the wind-force effect of air blast, need to continue forward flowing, but need shunting herein, in order to ensure the even of shunting, so, need through divider 2.Divider 2 inside is all in charge of 11 in many, before wind powder arrives divider 2, has been blowed evenly, now, only needs to ensure that wind powder enters divider 2 smoothly.Under drum wind action, wind pruinescence is blown in many in divider 2 to be all in charge of in 11, now, is all in charge of in 11 and all contains the larger coal dust of particle and the less coal dust of particle in every root.At the end of divider 2, connection be the bifurcated pipe 12 of branch pipe(tube) distributor 3.Because be radially provided with at least one piece of flow distribution plate 15 in bifurcated pipe 12, the present embodiment selects two pieces of flow distribution plates 15, as shown in Figure 4, bifurcated pipe 12 is divided into four passages, certainly, needs the quantity going to select needs shunting according to the situation of reality.Meanwhile, bifurcated pipe 12 cross section is divided equally by two pieces of flow distribution plates 15, arm 16 together with often adjacent two halves flow distribution plate 15 is formed with bifurcated pipe 12 wall, and namely each arm 16 is the sector structure of 90 degree.Because the top of flow distribution plate 15 directly contacts with antistatic poly (methyl methacrylate) plate 9, in like manner, four pieces are divided into by antistatic poly (methyl methacrylate) plate 9, through hole 10 correspondence on antistatic poly (methyl methacrylate) plate 9 interior is all in charge of 11 and is divided into four groups, is often all in charge of 11 in group by the corresponding special-shaped transition conduit 13 of bifurcated pipe 12.Now, be equivalent to by wind powder bifurcated, but also do not enter a pulverized coal feed pipe 4.Along with the active force of air blast, wind powder continues flow forward again, and enter a pulverized coal feed pipe 4 by tube connector 14, bifurcated completes.
Claims (2)
1. the even conveyance conduit of coal dust and divider, it is characterized in that: comprise main pulverized coal feed pipe, divider, branch pipe(tube) distributor and multiple pulverized coal feed pipes, the end of main pulverized coal feed pipe connects the top of divider by sealing flange, the top of the end seal connecting branch road distributor of divider, the end of branch pipe(tube) distributor connects multiple pulverized coal feed pipes; Described main pulverized coal feed pipe comprises outer tube and interior screen casing, and the surrounding of outer tube is distributed with air admission hole, and interior screen casing surrounding is evenly distributed with pore, and hole diameter is less than pulverized coal particle diameter; Described divider comprises outer tube body, one piece of antistatic poly (methyl methacrylate) plate is fixed at the two-port place of outer tube body respectively, every block antistatic poly (methyl methacrylate) plate is evenly provided with multiple through hole, and through hole on two pieces of antistatic poly (methyl methacrylate) plates is symmetrical, connect by dividing equally the seal of tube in one between often pair of symmetrical through hole; Described branch pipe(tube) distributor comprises bifurcated pipe, special-shaped transition conduit and tube connector, the top of bifurcated pipe is connected to the end of divider, at least one piece of flow distribution plate is radially provided with in bifurcated pipe, bifurcated pipe cross section is divided equally by all flow distribution plates, arm together with often adjacent two halves flow distribution plate is formed with bifurcated tube wall, per pass arm connects the top of a tube connector by a special-shaped transition conduit, and the end of tube connector connects the top of a pulverized coal feed pipe.
2. the even conveyance conduit of coal dust according to claim 1 and divider, is characterized in that: described air admission hole is connected with appendix.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510511929.5A CN105114972B (en) | 2015-08-20 | 2015-08-20 | A kind of uniform conveyance conduit of coal dust and divider |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510511929.5A CN105114972B (en) | 2015-08-20 | 2015-08-20 | A kind of uniform conveyance conduit of coal dust and divider |
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| CN105114972A true CN105114972A (en) | 2015-12-02 |
| CN105114972B CN105114972B (en) | 2017-06-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108758680A (en) * | 2018-06-01 | 2018-11-06 | 中国神华能源股份有限公司 | Coal even separator and coal pulverizer |
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| CN205037339U (en) * | 2015-08-20 | 2016-02-17 | 河南省中利工矿设备制造有限公司 | Buggy uniform delivery device |
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Patent Citations (7)
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| CN201000078Y (en) * | 2006-12-01 | 2008-01-02 | 广东韶钢松山股份有限公司 | Gas/solid liquid equipartition device |
| JP2008241081A (en) * | 2007-03-26 | 2008-10-09 | Mitsubishi Heavy Ind Ltd | Pulverized coal concentration adjusting device |
| CN201364031Y (en) * | 2009-03-13 | 2009-12-16 | 南京三埃工控股份有限公司 | High-uniformity powder coal distributor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108758680A (en) * | 2018-06-01 | 2018-11-06 | 中国神华能源股份有限公司 | Coal even separator and coal pulverizer |
| CN108758680B (en) * | 2018-06-01 | 2019-10-15 | 中国神华能源股份有限公司 | Coal even separator and coal pulverizer |
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| Publication number | Publication date |
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| CN105114972B (en) | 2017-06-06 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Pulverized coal uniform conveying pipeline and equalizer Effective date of registration: 20170828 Granted publication date: 20170606 Pledgee: Henan Futan Liquor Industry Co., Ltd. Pledgor: HENAN ZHONGLI MINING EQUIPMENT MANUFACTURING CO., LTD. Registration number: 2017410000019 |
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Date of cancellation: 20190806 Granted publication date: 20170606 Pledgee: Henan Futan Liquor Industry Co., Ltd. Pledgor: HENAN ZHONGLI MINING EQUIPMENT MANUFACTURING CO., LTD. Registration number: 2017410000019 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
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Denomination of invention: A kind of uniform conveying pipe and distributor for pulverized coal Effective date of registration: 20201123 Granted publication date: 20170606 Pledgee: PUYANG XIANGYANG GARMENT Co.,Ltd. Pledgor: HENAN ZHONGLI MINING EQUIPMENT MANUFACTURING Co.,Ltd. Registration number: Y2020410000003 |