CN1330408C - Hood gad distributing board - Google Patents
Hood gad distributing board Download PDFInfo
- Publication number
- CN1330408C CN1330408C CNB2004100243014A CN200410024301A CN1330408C CN 1330408 C CN1330408 C CN 1330408C CN B2004100243014 A CNB2004100243014 A CN B2004100243014A CN 200410024301 A CN200410024301 A CN 200410024301A CN 1330408 C CN1330408 C CN 1330408C
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- China
- Prior art keywords
- blast cap
- gas
- blast
- distributing plate
- gas distributing
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- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The present invention provides a blast cap gas distributing plate. The blast cap gas distributing plate comprises a plurality of gas distribution blast caps fixed on a blast cap gas distributing plate; each of the blast caps comprises an air inlet inner pipe whose jet holes are symmetrically distributed, a fixing nut, etc. The blast cap gas distributing plate is characterized in that an outer pipe (7) is arranged on the air inlet inner pipe of the blast cap; an outlet of the outer pipe (7) is designed in a smooth transitional section; therefore, the blast cap gas distributing plate not only can reduce the momentum loss of exit gas but also can make the exit gas only have a horizontal component; and the abrasion of granules entrapped in jet gas to the gas distributing plate and the outer pipe of the blast cap is reduced. A gas inlet of an inner pipe of each of the blast caps is provided with an adjustable resistance opening screw cap (2) which can conveniently regulate the resistance of the blast caps to make the gas uniformly distributed on the whole gas distributing plate; the occurrence of a dead zone on the gas distributing plate is prevented, and the phenomena of bonding and coking high-temperature granules; and the gas distributing plate can be stably operated for a long term, and the operating area of the blast cap gas distributing plate is widened.
Description
Technical field:
The present invention relates to the blast cap gas distribution grid that a kind of blast cap gas distribution grid, particularly burning device of circulating fluidized bed and gasification installation adopt.
Background technology:
The blast cap gas distribution grid is a kind of gas distribution grid that generally adopts in fluidized bed coal burning and the gasification installation, and air or oxygen-enriched air, steam import in the fluidized-bed reactor by a plurality of gas blast caps.Because the cross-sectional length of large-scale fluidized bed coal combustion and gasification installation is usually greater than 1m, width is also greater than 1m, cause that different blast cap gas feeding amounts present uneven distribution on the blast cap gas distribution grid, experimental study had proved already that the ratio of maximum tolerance blast cap and minimum tolerance blast cap can reach 4.19 on the distribution grid.In other words, serious gas uneven distribution situation has appearred in different blast caps on the gas distribution grid.Some blast cap is by narrow-minded, and blast cap peripheral region solid particle is in unfluidized state (generation dead band), and these zones must bring high-temperature particle to reunite, and then causes fluidized bed coal burning and gasification installation large-area coking, even stops transport.
The blast cap design is the key of decision blast cap gas distribution grid operating characteristics, and the blast cap that adopts in existing fluidized bed coal burning and the gasification installation is distinguished according to the jet orifice direction, comprising: (1) horizonally projected jet hole blast cap; (2) inclination jet orifice blast cap; (3) add guide plate jet orifice blast cap.Distinguish according to the blast cap top shape and to comprise: (1) has cap head blast cap; (2) non-cap blast cap.Above-mentioned blast cap has all adopted jet orifice directly to spray into the form of fluid bed, because the unreasonable and method for designing defective of its structure, the existing following problem of blast cap ubiquity in operating process: (1) solid particle flows backwards and enters the distribution air chamber problem of giving.When the fluid bed superficial gas velocity was low, the pressure drop of fluidized bed gas distribution grid was little, and negative numerical value appears in the fluidized-bed pressure curve of cyclical fluctuations, and promptly fluid bed is presorted the gas distribution constant pressure by force less than distribution grid top pressure, and the solid particle suck-back enters to be presorted in the cloth air chamber; (2) blast cap abrasion problem.Traditional blast cap design jet orifice has tangible horizontal direction effluxvelocity, and the solid particle of jet entrainment has bigger horizontal momentum, makes gas distribution grid, adjacent gas blast cap and fluidisation bedside wall zone thereof produce serious abrasion.(3) the loosening problem of blast cap.Because the gas uneven distribution of blast cap gas distribution grid, part blast cap gas flux is bigger, and blast cap top bubble is big, makes blast cap bear strong vibration, and then makes blast cap loosening, brings very big hidden danger for the normal running of blast cap gas distribution grid.
Summary of the invention:
Deficiency and defective at the prior art existence, the objective of the invention is to provide a kind of blast cap gas distribution grid of forming by the blast cap of band outer tube, make the blast cap gas distribution grid can realize that gas evenly distributes, effectively avoid serious gas uneven distribution phenomenon to take place, prevent high-temperature solid particle local bonding, coking and stoppage in transit accident.
The objective of the invention is to be achieved through the following technical solutions: constitute by a plurality of distribution of gas blast caps fixing on it, each blast cap comprises that jet orifice is compositions such as the interior pipe of blast cap air inlet of symmetrical distribution, hold-down nut, it is characterized in that on the pipe outer tube being housed in the blast cap air inlet, gas folds into downwards the fluid bed by outer tube from the jet orifice ejection, has avoided horizonally projected jet gas directly to enter in the fluid bed.In order to reduce horizontal direction effluxvelocity component, blast cap outer tube gas outlet has designed and has seamlessly transitted outlet, seamlessly transitting outlet should be in 65～80 ° of scope with the angle of horizontal direction, so both reduced the gas loss of momentum, reduce the horizonally projected jet degree of depth again, on same cross section, can arrange the more windy cap of installation.In the import department of blast cap change resistance opening nut is installed, is regulated import change resistance opening nut diameter and can change the blast cap air resistance.
Description of drawings:
Fig. 1 is the structural representation according to the distribution of gas blast cap that has outer tube proposed by the invention.
Each component names is described as follows among the figure:
1. gas feed; 2. become resistance opening nut; 3. manage in the blast cap air inlet; 4. blast cap hold-down nut; 5. distribution of gas motherboard; 6. gas jet hole; 7. blast cap outer tube; 8. outer tube exports the section of seamlessly transitting; 9. gas vent.
The specific embodiment:
Describe concrete structure of the present invention and preferred forms in detail below in conjunction with accompanying drawing.
As shown in the figure, the present invention mainly comprises gas feed 1, becomes resistance opening nut 2, pipe 3 in the blast cap air inlet, and blast cap hold-down nut 4, a plurality of gas jets hole 6, blast cap gas is discharged outer tube 7, the gas vent section of seamlessly transitting 8 formations such as grade.Pipe 3 is fixed on the distribution of gas motherboard 5 by hold-down nut 4 in the blast cap air inlet, becomes resistance opening nut 2 into changing the internal diameter nut, is installed on and manages 3 entrance point in the blast cap air inlet.The port of export of pipe 3 is installed blast cap outer tube 7 in the blast cap air inlet, outer tube exit 8 is for seamlessly transitting shape outlet design, so not only can reduce the loss of momentum of exit gas, and can make exit gas only have horizontal component, reduced of the abrasion of Gas Jet entrained particles to gas distribution grid and blast cap outer tube.
In order to reach the best-of-breed technology effect, the blast cap outer tube seamlessly transits the angle of shape gas vent and horizontal direction should be in 65～80 ° of scopes, and the blast cap inlet diameter should be in 23.0～82.5mm scope, and blast cap outlet external diameter should be in 84～126mm scope.
The present invention compared with prior art has advantage and usefulness: this gas blast cap is owing to adopted blast cap gas discharge outer tube and seamlessly transitted the shape gas vent, effectively eliminated gas jet vertical direction component, reduced the loss of Gas Jet exit momentum, reduced the Gas Jet horizonally projected jet degree of depth simultaneously, thereby reduced jet closing on effective abrasion of blast cap and gas distribution grid.The change resistance opening nut of import department can be regulated the blast cap resistance easily, and gas is evenly distributed on whole distribution grid, prevents to occur the dead band on the distribution grid, avoids high-temperature particle bonding and coking phenomenon, and distribution grid can steady in a long-term be operated; And the tuyere distributor operating area is broadened.The drag characteristic of blast cap (resistance coefficient) is only relevant with blast cap annular space area ratio with blast cap inlet-duct area and jet orifice area ratio and blast cap inlet-duct area, and is irrelevant with other factors, and the blast cap simplicity of design is easy to amplify.
And this blast cap formula gas distribution grid can be on a large scale operated under fluid bed superficial gas velocity and the loose distribution of gas anode drop scope, can guarantee also that under lower apparent operating gas velocity whole blast cap gas distribution grid gas evenly distributes.
Claims (2)
1. blast cap gas distribution grid, constitute by a plurality of distribution of gas blast caps fixing on it, each blast cap comprises the interior pipe of blast cap air inlet, the hold-down nut that jet orifice is symmetrically distributed, it is characterized in that on the pipe outer tube (7) being housed in the blast cap air inlet, the exit of outer tube (7) is designed to seamlessly transit outlet, the blast cap outer tube seamlessly transits the angle of shape gas vent and horizontal direction should be in 65～80 ° of scopes, the blast cap inlet diameter should be in 23.0～82.5mm scope, and blast cap outlet external diameter should be in 84～126mm scope.
2. according to the described blast cap gas distribution grid of claim 1, it is characterized in that the pipe air inlet is equipped with change resistance opening nut (2) in the blast cap air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100243014A CN1330408C (en) | 2004-06-05 | 2004-06-05 | Hood gad distributing board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100243014A CN1330408C (en) | 2004-06-05 | 2004-06-05 | Hood gad distributing board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1583237A CN1583237A (en) | 2005-02-23 |
| CN1330408C true CN1330408C (en) | 2007-08-08 |
Family
ID=34600873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100243014A Expired - Fee Related CN1330408C (en) | 2004-06-05 | 2004-06-05 | Hood gad distributing board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1330408C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164877B (en) * | 2007-09-26 | 2010-06-09 | 青岛科技大学 | Biomass double fluidized-bed device for preparing active carbon |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101708449A (en) * | 2005-06-03 | 2010-05-19 | 塞巴斯蒂安·崔玛 | Fluidized bed reaction tower |
| CN100443800C (en) * | 2005-12-09 | 2008-12-17 | 西安热工研究院有限公司 | Adjustable air distributor for circulating fluidized bed boiler |
| CN102029131B (en) * | 2010-10-26 | 2011-12-14 | 周洪山 | Gas distributor |
| CN107224941A (en) * | 2017-06-26 | 2017-10-03 | 辽宁加宝石化设备有限公司 | A kind of low pressure drop high stability distributor and reactor |
| CN111359548B (en) * | 2020-05-06 | 2022-05-17 | 淮阴工学院 | Fluidized bed gas distribution plate mechanism with easily-detachable blast cap |
| CN113623644B (en) * | 2021-08-17 | 2023-10-17 | 哈尔滨锅炉厂有限责任公司 | Resistance-adjustable hood structure for fluidized bed boiler |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2360150Y (en) * | 1998-12-11 | 2000-01-26 | 夏光辉 | Imtegral fine casting funnel cap |
| CN1412100A (en) * | 2002-11-29 | 2003-04-23 | 武汉凯迪电力股份有限公司 | Resistance adjustable gas distributing device for fluid material |
-
2004
- 2004-06-05 CN CNB2004100243014A patent/CN1330408C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2360150Y (en) * | 1998-12-11 | 2000-01-26 | 夏光辉 | Imtegral fine casting funnel cap |
| CN1412100A (en) * | 2002-11-29 | 2003-04-23 | 武汉凯迪电力股份有限公司 | Resistance adjustable gas distributing device for fluid material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164877B (en) * | 2007-09-26 | 2010-06-09 | 青岛科技大学 | Biomass double fluidized-bed device for preparing active carbon |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1583237A (en) | 2005-02-23 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070808 |