CN2608843Y - Back material controller of flying ash bottom feed circulating fluidized bed - Google Patents
Back material controller of flying ash bottom feed circulating fluidized bed Download PDFInfo
- Publication number
- CN2608843Y CN2608843Y CN 03221013 CN03221013U CN2608843Y CN 2608843 Y CN2608843 Y CN 2608843Y CN 03221013 CN03221013 CN 03221013 CN 03221013 U CN03221013 U CN 03221013U CN 2608843 Y CN2608843 Y CN 2608843Y
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- CN
- China
- Prior art keywords
- fluidized bed
- standpipe
- air
- feed back
- recirculating fluidized
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a back material controller of a flying ash bottom feed circulating fluidized bed used for delivering high-temperature solid particles, which comprises a shell body. A bed body and an air chamber are arranged in the shell body, and a wind distributing plate is arranged between the bed body and the air chamber. An air intake is arranged on the air chamber, a standpipe and a lower ash pipe are arranged on the bed body. A partition board is arranged between the standpipe and the lower ash pipe positioned in the bed body, and a wind hole is arranged on the wind distributing plate. In burning mode of the fly ash bottom feeding circulating fluidized bed, the differential pressure between a burning chamber and a separator is higher than that of a conventional circulating fluidized bed, so the requirement of the sealing performance for the back material controller is higher than that of the conventional back material feeder. The utility model is provided with the standpipe which especially extends into the shell body, and the end portion of the standpipe is not lower than the peak of the material accumulation angle, so that the resistance that the air has to overcome when the air oppositely flees to the separator is increased, the leakage is reduced, and accordingly, the sealing performance of the utility model is improved.
Description
One, technical field
The utility model relates to a kind of end and raises the parts of burning device of circulating fluidized bed, relates in particular to the feed back controller of raising recirculating fluidized bed at the bottom of the flying dust.
Two, background technology
General volume control device can be divided into mechanical valve and on-mechanical valve two big classes.Mechanical valve is moved by mechanical component and is reached the purpose of controlling and regulating the solid particle flow, as ball valve, and gate valve etc.Because circulation flying dust temperature is higher in CFBB, valve need at high temperature be worked, and mechanical device at high temperature can produce and expand and high-temperature oxydation, and moving component also very easily enters solid particle, produces phenomenons such as jam.In addition, because the motion of solid particle, the wearing and tearing of workpiece are also quite serious under the condition of high temperature.The on-mechanical valve need not any extraneous mechanical force effect, only adopt gas to promote solids movement, be implemented in conveying solid substance particle in simple and reliable ground under the worst hot case.Because so on-mechanical valve movement-less part is its simple in structure, flexible operation, cheap.Existing recirculating fluidized bed almost all adopts the on-mechanical valve.The on-mechanical valve is divided into two big classes according to its function, and the first kind is a controllable type, mainly comprises " L " valve, " J " valve etc.This valve not only can be with particle transport to main bed, can the opening and closing solid particle flows, and can control and regulate the flow of solid particle.Second class is a venting valve, and principal mode has sealing transfer valve, loop seal etc.This valve mainly is through a pressure barrier, and from the low high pressure that is sent to, and very little to the mobile regulating action of solid particle, valve and standpipe concern balance solid particle flow automatically according to the pressure balance of self with solid particle.Therefore, existing on-mechanical valve, comprise controllable type and through-flow type, have following problem: the flow of solid particle can be controlled and regulate to controlled valve, but when pressure reduction was big between combustion chamber and separator, air-tightness was poor, be that combustion chamber and separator leakage rate are big, the condition that Pickering falls is destroyed, directly causes carrying instability, and " anti-channeling " of gas will influence the separative efficiency of separator simultaneously.Controlled valve is because little at the turning point flow area, and Chang causes problems such as coking in this place's formation obstruction with owing to flow not easily.Venting valve can be sent to high pressure from low with solid particle, but the solid particle flow can not control, and is few for a long time during the ash amount that enters the combustion chamber, causes that temperature has influenced the burning in the stove with grey quantitative change fluctuation in the stove.
Three, technology contents
1, technical problem: the utility model provides the feed back controller of raising recirculating fluidized bed at the bottom of a kind of controlled flying dust that can improve sealing property.
2, technical scheme: the utility model is the feed back controller of raising recirculating fluidized bed at the bottom of a kind of flying dust that is used to carry high-temperature solid particle, comprise housing 1, in housing 1, be provided with a body 11 and air compartment 12, between bed body 11 and air compartment 12, be provided with air distribution plate 2, on air compartment 12, be provided with air inlet, on bed body 11, be provided with standpipe 3 and ash discharging pipe 4, in bed body 11 and between standpipe 3 and ash discharging pipe 4, be provided with dividing plate 5, on air distribution plate 2, be provided with the wind hole.
3, beneficial effect: compare with existing material returning device, the utlity model has following characteristics: 1. in raising the CFBC mode at the bottom of the flying dust, pressure reduction is much higher than the regular circulation fluid bed between combustion chamber and the separator, therefore also will more above-mentioned material returning device height to the requirement of feed back controller sealing property.The utility model is provided with standpipe, especially makes standpipe stretch into housing, and its end is not less than the summit at solid accumulation angle, and the resistance that gas " anti-channeling " to separator will be overcome increases, and leakage rate reduces, thereby has improved sealing property of the present utility model.The directed wind that pressure is high will further stop to such an extent that the gas in the combustion chamber enters in the material returning device, make the sealing property of feeder that further raising arranged.2. the utility model changes side air inlet into bottom air inlet, the mode that adopts directed wind and vertically-supplying air to combine, tissue has effectively been carried out in the motion of solid particle, loop seal uncontrollable like this and that regulate becomes controlled valve, promptly can control the flow of solid particle, guarantee the stability of stove internal combustion, therefore the utlity model has controllable valve and venting valve advantage separately.3. the utility model adopts cap cloth wind mode in the aperture, and cloth wind is even in the material returning device bed, and solid particle is carried stable, has avoided because the bad coking that causes of fluidisation in the bed was lost efficacy material returning device.
Four, description of drawings
Fig. 1 is the structural front view of the utility model embodiment.
Fig. 2 is the structure vertical view of the utility model embodiment.
Fig. 3 is the utility model guiding cap structure schematic diagram.
Fig. 4 is the utility model guiding cap structure cutaway view.
Fig. 5 the utility model cap structure schematic diagram.
Fig. 6 the utility model cap structure cutaway view.
Fig. 7 is the utility model blast cap and guiding blast cap distribution map.
Five, specific embodiments
The utility model is the feed back controller of raising recirculating fluidized bed at the bottom of a kind of flying dust that is used to carry high-temperature solid particle, comprise housing 1, in housing 1, be provided with a body 11 and air compartment 12, between bed body 11 and air compartment 12, be provided with air distribution plate 2, on air compartment 12, be provided with air inlet, on bed body 11, be provided with standpipe 3 and ash discharging pipe 4, in 11 and between standpipe 3 and ash discharging pipe 4, be provided with dividing plate 5, on air distribution plate 2, be provided with the wind hole, on the wind hole of the air distribution plate 2 that is positioned at standpipe 3 lower zones, be provided with guiding blast cap 21, on guiding blast cap 21, be provided with guiding wind hole, this guiding wind hole by the axial exhaust vent 211 that communicates and radially exhaust vent 212 form, radially exhaust vent 212 is towards exit side, the wind hole that is positioned at the air distribution plate 2 of exit side lower zone is provided with blast cap 22, on blast cap 22, be provided with fresh air inlet, this fresh air inlet is made up of the axial hole 221 and the radial hole 222 of intercommunication, in air compartment 12 and the boundary position that is positioned at guiding blast cap 21 and blast cap 22 be provided with air compartment baffle 6, and on two air compartments that are separated thus, air inlet 121 and 122 are set respectively, standpipe 3 stretches into housing 1, and its end is not less than the summit at solid accumulation angle.
Claims (7)
1, raises the feed back controller of recirculating fluidized bed at the bottom of a kind of flying dust that is used to carry high-temperature solid particle, comprise housing (1), it is characterized in that in housing (1), being provided with a body (11) and air compartment (12), between bed body (11) and air compartment (12), be provided with air distribution plate (2), on air compartment (12), be provided with air inlet, on bed body (11), be provided with standpipe (3) and ash discharging pipe (4), in bed body (11) and be positioned between standpipe (3) and the ash discharging pipe (4) and be provided with dividing plate (5), on air distribution plate (2), be provided with the wind hole.
2, raise the feed back controller of recirculating fluidized bed at the bottom of the flying dust according to claim 1, it is characterized in that on the wind hole of the air distribution plate (2) that is positioned at standpipe (3) lower zone, being provided with guiding blast cap (21), on guiding blast cap (21), be provided with guiding wind hole, this guiding wind hole by the axial exhaust vent (211) that communicates and radially exhaust vent (212) form.
3, raise the feed back controller of recirculating fluidized bed at the bottom of the flying dust according to claim 2, it is characterized in that radially exhaust vent (212) is towards exit side.
4, according to the feed back controller of raising recirculating fluidized bed at the bottom of claim 1 or the 2 or 3 described flying dusts, it is characterized in that on the wind hole of the air distribution plate that is positioned at the exit side lower zone (2), being provided with blast cap (22), be provided with fresh air inlet on blast cap (22), this fresh air inlet is made up of the axial hole (221) and the radial hole (222) of intercommunication.
5, raise the feed back controller of recirculating fluidized bed at the bottom of the flying dust according to claim 4, the boundary position that it is characterized in that in air compartment (12) and be positioned at guiding blast cap (21) and blast cap (22) is provided with air compartment baffle (6), and air inlet (121 and 122) is set respectively on two air compartments that are separated thus.
6, raise the feed back controller of recirculating fluidized bed at the bottom of the flying dust according to claim 5, it is characterized in that standpipe (3) stretches into housing (1), its end is not less than the summit at solid accumulation angle.
7, according to the feed back controller of raising recirculating fluidized bed at the bottom of claim 1 or the 2 or 3 described flying dusts, it is characterized in that standpipe (3) stretches into housing (1), its end is not less than the summit at solid accumulation angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03221013 CN2608843Y (en) | 2003-04-08 | 2003-04-08 | Back material controller of flying ash bottom feed circulating fluidized bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03221013 CN2608843Y (en) | 2003-04-08 | 2003-04-08 | Back material controller of flying ash bottom feed circulating fluidized bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2608843Y true CN2608843Y (en) | 2004-03-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03221013 Expired - Lifetime CN2608843Y (en) | 2003-04-08 | 2003-04-08 | Back material controller of flying ash bottom feed circulating fluidized bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2608843Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1312431C (en) * | 2004-11-11 | 2007-04-25 | 华中科技大学 | Sealed fluid back-feeder |
| CN107191923A (en) * | 2017-07-17 | 2017-09-22 | 四川竹根锅炉股份有限公司 | A kind of grid plate type conveyer |
-
2003
- 2003-04-08 CN CN 03221013 patent/CN2608843Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1312431C (en) * | 2004-11-11 | 2007-04-25 | 华中科技大学 | Sealed fluid back-feeder |
| CN107191923A (en) * | 2017-07-17 | 2017-09-22 | 四川竹根锅炉股份有限公司 | A kind of grid plate type conveyer |
| CN107191923B (en) * | 2017-07-17 | 2019-01-08 | 四川竹根锅炉股份有限公司 | A kind of grid plate type conveyer |
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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: 20130408 Granted publication date: 20040331 |