CN2609655Y - Inserted counterflow column funnel cap for fluid-bed wind distributing plate - Google Patents
Inserted counterflow column funnel cap for fluid-bed wind distributing plate Download PDFInfo
- Publication number
- CN2609655Y CN2609655Y CN 03200899 CN03200899U CN2609655Y CN 2609655 Y CN2609655 Y CN 2609655Y CN 03200899 CN03200899 CN 03200899 CN 03200899 U CN03200899 U CN 03200899U CN 2609655 Y CN2609655 Y CN 2609655Y
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- outer tube
- embedded
- distribution plate
- air distribution
- column type
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Abstract
The utility model relates to an embedded counter flow column type hood for fluidized bed air distribution plate, comprising an embedded tube with openings at two ends and an outer tube with an opening at one end. The upper portion of the embedded tube is nested in the outer tube, with a circumferential seam limited between the embedded tube and the outer tube. A clearance is arranged between the embedded tube and the top portion of the outer tube, which are seal contacted at the opening end of the outer tube. The lateral wall of the outer tube corresponding to the circumferential seam is opened with transversal eyelets, and the embedded tube is provided with a flange for limiting relative position of the embedded tube and the outer tube. Sectional area of the circumferential seam is larger than that of the opening end of the embedded tube, or larger than total sectional area of all eyelets in the lateral wall of the outer tube, or simultaneously larger than that of the opening end of the embedded tube and total sectional area of all eyelets in the lateral wall of the outer tube. The function of preventing leaking dust is mainly realized by the special structure between the outer tube and the embedded tube, so the embedded counter flow column type hood has great function of preventing dust leaking when air passing the hood has lower speed, and the hood has lower resistance force for air flowing, with simple structure.
Description
Invention field
The utility model relates to a kind of blast cap that is used for fluidized bed air distribution plate, particularly relates to a kind of embedded reverse-flow column type blast cap that is used for fluidized bed air distribution plate.
Technical background
Fluid bed is a kind of commercial plant that is mainly used in gas-solid reaction that is widely adopted, and has series of advantages such as simple in structure, movement-less part, gas-solid blending be even.
One of critical component of fluid bed burner hearth 4 is an air distribution plate 7, it also is the base plate of fluid bed burner hearth, and its underpart is connected with air compartment 2, and its effect is the material that supports in the fluid bed furnace thorax, gas in the air compartment is passed equably from the whole zone of air distribution plate, enter burner hearth.The main performance of air distribution plate is the uniformity of cloth wind, and this is one of the key that guarantees the fluidization quality of fluid bed.The key that makes gas in the air compartment pass air distribution plate equably is to make to run into certain resistance when gas passes air distribution plate that the cloth wind uniformity of the big more then air distribution plate of this resistance is good more.But on the other hand, the big more power that then consumes of the resistance of air distribution plate is also big more, and this point is difficult to accept.General principle is to select the resistance of air distribution plate according to fluid bed pressure differential up and down, and the knowledge of this respect can be found from the books of existing public publication.Recent two decades comes, and generally adopts the air distribution plate of having arranged blast cap.Arranged many equally spaced blast caps on air distribution plate, made the gas in the air compartment enter each blast cap equably, the ejection of the aperture from the blast cap enters the fluid bed burner hearth then.Adopt the benefit of blast cap to be, the resistance ratios of gas is less, and the uniformity of cloth wind is relatively good.But the shortcoming of blast cap is that the leakage gray scale is more serious, i.e. the aperture leakage inlet air plenum that the less solid-phase material of size ratio is easy to pass blast cap in the burner hearth.When the area design of air distribution plate must be bigger or fluid bed very strong thereby the small particle diameter material a lot of or the pressure oscillation of fluid bed when relatively more serious in the brokenness of underrun or solid-phase material, if still adopt the blast cap of lower resistance, the phenomenon of leaking ash just may be very serious.Blast cap leaks the loss that ash not only causes fluid bed burner hearth solid-phase material, and causes the wearing and tearing of air compartment wall easily, and when serious, air compartment is leaked ash and fills up and force fluid bed out of service.In order to solve the problem that blast cap leaks ash, some difform blast caps have appearred, mainly contain blast caps such as T type, arrow type, bell jar type, pigtail type and column type.The basic principle of these blast caps all is when keeping resistance low, utilizes the stocking angle of solid-phase material, and the aperture that design shape is special passes aperture leakage inlet air plenum to stop the particle in the burner hearth.But on large-scale fluid bed, the air distribution plate area is very big, and the performance of the anti-leak-stopping ash of these blast caps also worse and worse.
Summary of the invention
The purpose of this utility model by the special structure of design blast cap, thereby provides a kind of embedded reverse-flow column type blast cap that is used for fluidized bed air distribution plate in order to overcome the shortcoming of prior art Apoplexy cap leakproof ash poor performance.
The technical solution of the utility model is as follows:
The embedded reverse-flow column type blast cap that is used for fluidized bed air distribution plate that the utility model provides comprises the embedded pipe 6 of a both ends open and the outer tube 9 of end opening one by one; The top nested of embedded pipe 6 limits a circumferential weld 61 betwixt in outer tube 9; Leave gap 62 between the top of embedded pipe 6 and outer tube 9; Embedded pipe 6 contacts in the sealing of the openend position of outer tube 9 with outer tube 9; Have horizontal aperture 10 on the sidewall of circumferential weld 61 pairing outer tubes 9; Distance h 2 between the upper open end of the center of aperture 10 and embedded pipe 6 is 0.5d2～5d2, and wherein d2 is the interior diameter of the upper open end of embedded pipe 6; Described embedded pipe 6 is provided with a flange 63 that limits itself and outer tube 9 relative positions; The sectional area of described circumferential weld 61 is greater than the sectional area of embedded pipe 6 upper open ends; The sectional area of described circumferential weld 61 is greater than the total cross-sectional area of all apertures 10 on the sidewall of outer tube 9; The sectional area of described circumferential weld 61 is simultaneously greater than the total cross-sectional area of all apertures 10 on the sidewall of the sectional area of embedded pipe 6 upper open ends and outer tube 9; Described outer tube 9 is the outer tube of anti-friction material for material; Described embedded pipe 6 is the embedded pipe of heat resisting steel for material; Described embedded pipe 6 is the embedded pipe of Cr25 for material; Described outer tube 9 is the outer tube of heat resisting steel or heat-resisting cast iron for material; Described outer tube 6 is to be the outer tube of 1Cr18Ni9Ti.
The principle of the embedded reverse-flow column type blast cap leakproof ash that is used for fluidized bed air distribution plate that the utility model provides is:
When certain momentary fluctuation took place, the gas 5 that has entered fluid bed burner hearth 4 may be to air compartment 2 anti-channelings, carried particle in the fluid bed furnace thorax 4 secretly and passed aperture 10 on the outer tube 9, entered the circumferential weld 61 between outer tube 9 and the embedded pipe 6; Because the area of circumferential weld 61 is greater than the area of aperture 10, the speed of the gas of anti-channeling in circumferential weld 61 reduces suddenly, can't continue entrained particles and upwards flow, thereby make particle be trapped in the bottom of circumferential weld 61; When the momentary fluctuation disappearance, when being returned to normal condition, the particle that gas 5 will be trapped in circumferential weld 61 bottoms blows out aperture 10.
The embedded reverse-flow column type cap structure that is used for fluidized bed air distribution plate that the utility model provides is simple, and leakproof ash performance is good; Because the effect of the anti-leak-stopping ash of blast cap of the present utility model is mainly finished by the special construction between outer tube and the embedded pipe, therefore under the lower situation of the gas velocity of passing through blast cap, also can play good leakproof ash effect, then this moment, blast cap was lower to the gas flow resistance ratios.
Description of drawings
Accompanying drawing 1 is the simple side schematic view of fluid bed;
Accompanying drawing 2 is structural representations of the present utility model;
Wherein: air compartment 2 fluid beds 4 gases 5
Embedded pipe 6 distribution grids 7 wearing layers 8
Outer tube 9 circumferential welds 61 gaps 62
Flange 63 apertures 10
The interior diameter d2 of the upper open end of embedded pipe 6
The interior diameter d3 hole diameter d4 of outer tube 9
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:
Embodiment 1:
As shown in Figure 2, a kind of embedded reverse-flow column type blast cap that the utility model provides comprises that a material is the embedded pipe 6 of both ends open of Cr25 and the outer tube 9 of the end opening that a material is 1Cr18Ni9Ti; The interior diameter d2 of the upper open end of embedded pipe 6 is 10mm, and the thickness of pipe is 2mm; The interior diameter of outer tube 9 is 24mm; The top nested of embedded pipe 6 limits a circumferential weld 61 betwixt in outer tube 9; Leave gap 62 between the top of embedded pipe 6 and outer tube 9; Embedded pipe 6 contacts in the sealing of the openend position of outer tube 9 with outer tube 9; Have on the sidewall of circumferential weld 61 pairing outer tubes 9 that 6 shapes are identical, the horizontal aperture 10 of equidistant distribution, the distance h 2 between the upper open end of the center of circle of aperture 10 and embedded pipe 6 is 10mm, and the diameter d 4 of aperture 10 is 5mm.
One flange 63 is arranged on the embedded pipe 6, be used to limit between embedded pipe 6 and the outer tube 9 relative position longitudinally.
In the present embodiment, the sectional area of the upper open end of embedded pipe 6 is 25 π mm
2, the sectional area of circumferential weld 61 is 95 π mm
2, the gross area of 6 apertures 10 is 37.5 π mm
2
Embodiment 2:
A kind of embedded reverse-flow column type blast cap in the present embodiment is substantially the same manner as Example 1, difference is to have on the sidewall of outer tube 9 in the present embodiment that 8 shapes are identical, the horizontal aperture 10 of equidistant distribution, and the distance h 2 between the upper open end of the center of circle of aperture 10 and embedded pipe 6 is 30mm.
The sectional area of the upper open end of embedded pipe 6 is 25 π mm
2, the sectional area of circumferential weld 61 is 95 π mm
2, identical with embodiment 1; Difference is that the gross area of 8 apertures 10 is 50 π mm
2
Claims (10)
1, a kind of embedded reverse-flow column type blast cap that is used for fluidized bed air distribution plate is characterized in that, comprises the embedded pipe (6) of a both ends open and the outer tube of end opening (9) one by one; The top nested of embedded pipe (6) limits a circumferential weld (61) betwixt in outer tube (9); Leave gap (62) between the top of embedded pipe (6) and outer tube (9); Embedded pipe (6) contacts in the sealing of the openend position of outer tube (9) with outer tube (9); Have horizontal aperture (10) on the sidewall of the pairing outer tube of circumferential weld (61) (9); Distance h 2 between the upper open end of the center of aperture (10) and embedded pipe (6) is 0.5d2～5d2, and wherein d2 is the interior diameter of the upper open end of embedded pipe (6).
2, the embedded reverse-flow column type blast cap that is used for fluidized bed air distribution plate according to claim 1 is characterized in that, described embedded pipe (6) is provided with a flange (63) that limits itself and outer tube (9) relative position.
3, the embedded reverse-flow column type blast cap that is used for fluidized bed air distribution plate according to claim 1 is characterized in that the sectional area of described circumferential weld (61) is greater than the sectional area of embedded pipe (6) upper open end.
4, the embedded reverse-flow column type blast cap that is used for fluidized bed air distribution plate according to claim 1 is characterized in that, the sectional area of described circumferential weld (61) is greater than the total cross-sectional area of all apertures (10) on the sidewall of outer tube (9).
5, the embedded reverse-flow column type blast cap that is used for fluidized bed air distribution plate according to claim 1, it is characterized in that the sectional area of described circumferential weld (61) is simultaneously greater than the total cross-sectional area of all apertures (10) on the sidewall of the sectional area of embedded pipe (6) upper open end and outer tube (9).
6, the embedded reverse-flow column type blast cap that is used for fluidized bed air distribution plate according to claim 1 is characterized in that, described outer tube (9) is the outer tube of anti-friction material for material.
7, the embedded reverse-flow column type blast cap that is used for fluidized bed air distribution plate according to claim 1 is characterized in that, described embedded pipe (6) is the embedded pipe of heat resisting steel for material.
8, the embedded reverse-flow column type blast cap that is used for fluidized bed air distribution plate according to claim 7 is characterized in that, described embedded pipe (6) is the embedded pipe of Cr25 for material.
9, the embedded reverse-flow column type blast cap that is used for fluidized bed air distribution plate according to claim 6 is characterized in that, described outer tube (9) is the outer tube of heat resisting steel or heat-resisting cast iron for material.
10, the embedded reverse-flow column type blast cap that is used for fluidized bed air distribution plate according to claim 9 is characterized in that, described outer tube (6) is is the outer tube of 1Cr18Ni9Ti.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03200899 CN2609655Y (en) | 2003-01-14 | 2003-01-14 | Inserted counterflow column funnel cap for fluid-bed wind distributing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03200899 CN2609655Y (en) | 2003-01-14 | 2003-01-14 | Inserted counterflow column funnel cap for fluid-bed wind distributing plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2609655Y true CN2609655Y (en) | 2004-04-07 |
Family
ID=34157376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03200899 Expired - Lifetime CN2609655Y (en) | 2003-01-14 | 2003-01-14 | Inserted counterflow column funnel cap for fluid-bed wind distributing plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2609655Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100557308C (en) * | 2007-12-21 | 2009-11-04 | 哈尔滨工业大学 | Wall-Central Composite is supplied with the fluidized bed combustor of secondary wind |
| CN101543753B (en) * | 2008-03-26 | 2011-06-15 | 中国科学院工程热物理研究所 | Embedded type cylindrical blast cap |
| CN103217005A (en) * | 2012-01-20 | 2013-07-24 | 中国科学院工程热物理研究所 | Embedded counter flow type cylindrical wind cap used on fluidized bed dryer |
| CN103740386A (en) * | 2013-12-30 | 2014-04-23 | 广州迪森热能技术股份有限公司 | Biomass two-stage reactor system |
-
2003
- 2003-01-14 CN CN 03200899 patent/CN2609655Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100557308C (en) * | 2007-12-21 | 2009-11-04 | 哈尔滨工业大学 | Wall-Central Composite is supplied with the fluidized bed combustor of secondary wind |
| CN101543753B (en) * | 2008-03-26 | 2011-06-15 | 中国科学院工程热物理研究所 | Embedded type cylindrical blast cap |
| CN103217005A (en) * | 2012-01-20 | 2013-07-24 | 中国科学院工程热物理研究所 | Embedded counter flow type cylindrical wind cap used on fluidized bed dryer |
| CN103217005B (en) * | 2012-01-20 | 2014-12-24 | 中国科学院工程热物理研究所 | Embedded counter flow type cylindrical wind cap used on fluidized bed dryer |
| CN103740386A (en) * | 2013-12-30 | 2014-04-23 | 广州迪森热能技术股份有限公司 | Biomass two-stage reactor system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130114 Granted publication date: 20040407 |