CN2747467Y - Fluidised sealed material return device - Google Patents
Fluidised sealed material return device Download PDFInfo
- Publication number
- CN2747467Y CN2747467Y CN 200420111359 CN200420111359U CN2747467Y CN 2747467 Y CN2747467 Y CN 2747467Y CN 200420111359 CN200420111359 CN 200420111359 CN 200420111359 U CN200420111359 U CN 200420111359U CN 2747467 Y CN2747467 Y CN 2747467Y
- Authority
- CN
- China
- Prior art keywords
- bed
- air distribution
- distribution plate
- fluid bed
- moving bed
- Prior art date
- 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
Links
Images
Abstract
The utility model discloses a fluidised sealed material return device. The utility model is structurally characterized in that the lower middle part of the inner surface of the back wall of a movable bed opposite to a partition board inclines to the direction of the partition board. An angle between an inclined plane and a wind distributing board is larger than a static angle of a recycle stream and smaller than 90 degrees. The active area of the movable bed is smaller then the active area of the fluidised bed. The wind distributing board of the movable bed is provided with an orient blast cap. At least one hole is arranged in the range of 90-160 degrees of the orient blast cap facing to the fluidised bed. A single wind chamber is arranged under the wind distributing board. The circumference of the wind chamber is sealed with the wind distributing board. The material return device does not generate the phenomenon that the operation is stopped, the residue is combined at high temperature, the furnace gas is inversed in a separator, etc. The fluidised sealed material return device enhances the stability and the dependability of the operation and is simple in structure and convenient in manufacture and installation. The utility model is used as the material return device of the recycle stream, is especially suitable for the circulating fluidised bed boiler, the gasification stove and the industrial furnace which have a stand pipe with a bit height.
Description
Technical field
The utility model relates to a kind of material-returning device in the circulating fluidized bed system.
Background technology
Combustion technology of circulating fluidized has become the important content that China's present stage clean coal utilizes technology.CFBC is carried out the low-temperature reinforcement burning, can use the industry and the solid waste etc. of living such as living beings, rubbish such as various coals, straw, shell, forest industry waste material, can in stove, add simultaneously desulfurizing agents such as lime stone, realize efficient, the economic desulfurization of combustion process, thereby have outstanding advantages such as fuel tolerance is wide, efficiency of combustion is high, pollutant emission is low.CFBB mainly is made up of fire box, separator, material returning device and back-end ductwork etc., the main effect of material returning device is the flying dust that separator separates to be sent into burner hearth fire again, to improve the efficiency of combustion of boiler, has sealing function simultaneously, avoid the burner hearth flue gas to return and scurry separator, and provide regulating measure for the boiler variable load operation by the flying dust closed circuit.
At present, using more material-returning device on the CFBB is the fluidisation sealing material returning device of the automatic adjusting type of non-mechanical type, and its moving bed and fluidized bed area are suitable, and air quantity and cloth wind mode are too.Though the fluidisation of this routine sealing material returning device can adapt to the needs of load variations automatically, does not need artificial adjusting, and is also low than another kind of valve type material-returning device to the requirement for height of stock column head.But practice shows, can occur operation during this material returning device is applied on the low capacity CFBB and stagnate, thus when high temperature slagging scorification and burner hearth flue gas anti-channeling separator, cause problems such as fluctuation of service.The structure of this conventional fluidisation sealing material-returning device introduced in " Jilin electric power " the 5th phase in 2000 " L valve and loop seal in the CFBB material return system " literary composition (pp.21-24).
Summary of the invention
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art part, and a kind of fluidisation sealing material-returning device is provided.This material-returning device has improved stability and the reliability of operation, and simple in structure, make easy for installation.
For achieving the above object, the technical solution adopted in the utility model is: a kind of fluidisation sealing material-returning device, and its bottom surface is an air distribution plate, and dividing plate is housed between two lateral walls, dividing plate and two side and end face joint all seal, and leave the slit between the air distribution plate, have ash discharging hole on air distribution plate, a side of dividing plate is a moving bed, opposite side is a fluid bed, end face at moving bed has material inlet, has material outlet at the sidewall of fluid bed, on the air distribution plate of fluid bed blast cap is installed; The inner surface middle and lower part of the rear wall that moving bed is relative with dividing plate tilts to the dividing plate direction, and the angle between its inclined-plane and the air distribution plate is greater than the angle of repose of recycle stock and less than 90 °; The effective area of moving bed is less than the effective area of fluid bed; On the air distribution plate of moving bed wind cap is installed, wind cap is having a hole at least in 90～160 ° of scopes of fluid bed; Air compartment is set below air distribution plate, seals with air distribution plate around it.
The utility model compared with prior art has the following advantages:
(1) inner surface of moving bed rear wall is designed to the inclined-plane, and the wind cap of negligible amounts has been installed, the material that assurance falls into from material inlet can not form at moving bed to be piled up and stagnation, can enter fluid bed rapidly, avoid under high-temperature condition, the slagging scorification that material is possible has improved the stability and the reliability of operation.
(2) effective area of moving bed is less than the effective area of fluid bed, makes wind from air compartment reasonably two distribution, realized the little air quantity of moving bed and the big air quantity air feed of fluid bed, thereby it is smooth and easy to guarantee that circulating ash flows in material-returning device.
(3) on the air distribution plate of moving bed, wind cap is installed, is guaranteed that the material moving bed is to fluid bed orientation, smooth and easy flowing.
(4) adopt single air compartment, rather than common double-wind chamber, thereby simple in structure, make easy for installationly, air quantity is regulated and is also become simple.
Description of drawings
Fig. 1 is the structure diagram of a kind of embodiment of the utility model.
Fig. 2 is the A-A profile of Fig. 1.
Fig. 3 is the structure diagram of a kind of embodiment of wind cap among Fig. 1.
Fig. 4 is the B-B profile of Fig. 3.
The specific embodiment
By Fig. 1, shown in Figure 2, bottom surface of the present utility model is an air distribution plate 8, the weight of bogey itself, heat resisting steel dividing plate 5 is housed between two lateral walls 14 and 15, and dividing plate 5 is welded on two side 14 and 15, and the flame retardant coating of end face 2 can be stretched in the upper end, dividing plate 5 is sealing with two side 14,15 and end face 2 joints, leave slit 12 between lower end and the air distribution plate 8, dividing plate plays sealing function, and the flue gas anti-channeling is to separator when avoiding the furnace pressure fluctuation.On air distribution plate 8, have ash discharging hole 6, ash discharging hole 6 ash pipe that runs in.One side of dividing plate 5 is a moving bed 4, and opposite side is a fluid bed 10.Have material inlet 1 on the end face 2 of moving bed 4, material inlet 1 connects standpipe, has material outlet 9 at the sidewall of fluid bed 10, and material outlet 9 connects refeed line.The inner surface middle and lower part of the rear wall 3 that moving bed 4 and dividing plate 5 are relative tilts to dividing plate 5 directions, the angle [alpha] between inclined-plane and the air distribution plate 8 greater than the angle of repose of recycle stock and in less than 90 ° scope all can, for example, among Fig. 1, angle α can be 60 °.The effective area of moving bed 4 is less than the effective area of fluid bed 10.On the air distribution plate 8 of moving bed 4, three wind caps 11 can be installed, directed with the importing of the material in the moving bed 4 fluid bed 10, the column type blast cap 13 of nine routines can be installed on the air distribution plate 8 of fluid bed 10, be used for even distributing wind, guarantee no fluidisation dead angle, thereby make particle enter refeed line from fluid bed 10 swimmingly.The number of wind cap 11 is less than the number of blast cap 13, can guarantee the big air quantity of fluid bed and the less air quantity air feed of moving bed.Air compartment 7 is set below air distribution plate 8, and air compartment 7 can be welded on the air distribution plate 8, seals with air distribution plate 8 around it.The cross-sectional area of air compartment 7 is equal to or greater than the effective area sum of moving bed 2 and fluid bed 10, thereby guarantees that each blast cap all has the wind supply.
On device, also can have hand hole, be used for inspecting wind cap 11 and blast cap 13, and remove the block that falls into device where necessary.
The outer surface of device can be coated by steel plate, and liner heat-barrier material and refractory material are formed.
The recycle stock (flying dust) that is separated by separator is by standpipe, enters moving bed 4 under himself gravity promotes.Simultaneously, loosening wind also enters moving bed 4 through air compartment 7, air distribution plate 8 and wind cap 11, and fluidized wind enters fluid bed 10 through air compartment 7, air distribution plate 8 and blast cap 13.During inflation, material in the standpipe forms the stock column head, in moving bed 4, cause the pressure that is higher than burner hearth, under this pressure effect, material in the moving bed 4 by slit 12, enters fluid bed 10 through the loosening wind water conservancy diversion that wind cap 11 provides, big air quantity in the fluid bed 10 rapidly with mass transport to refeed line, send burner hearth at last back to.When stopping transport, material can be got rid of by ash releasing tube 6.
The utility model is specially adapted to the less CFBB of standpipe height, gasification furnace and Industrial Stoves as the material-returning device of recycle stock.
Claims (3)
1. a fluidisation seals material-returning device, its bottom surface is an air distribution plate, dividing plate is housed between two lateral walls, and dividing plate and two side and end face joint all seal, and leave the slit between the air distribution plate, on air distribution plate, have ash discharging hole, one side of dividing plate is a moving bed, and opposite side is a fluid bed, has material inlet at the end face of moving bed, sidewall at fluid bed has material outlet, on the air distribution plate of fluid bed blast cap is installed; It is characterized in that:
The inner surface middle and lower part of the rear wall (3) that moving bed (4) is relative with dividing plate (5) tilts to dividing plate (5) direction, and the angle between its inclined-plane and the air distribution plate (8) is greater than the angle of repose of recycle stock and less than 90 °;
The effective area of moving bed (4) is less than the effective area of fluid bed (10);
Go up installation wind cap (11) at the air distribution plate (8) of moving bed (4), wind cap (11) is having a hole (16) at least in 90～160 ° of scopes of fluid bed (10);
Air compartment (7) is set below air distribution plate (8), seals with air distribution plate (8) around it.
2. fluidisation sealing material-returning device according to claim 1, it is characterized in that: the number of above-mentioned wind cap (11) is less than the number of blast cap (13).
3. fluidisation sealing material-returning device according to claim 1 and 2, it is characterized in that: the cross-sectional area of above-mentioned air compartment (7) is equal to or greater than the effective area sum of moving bed (4) and fluid bed (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420111359 CN2747467Y (en) | 2004-11-11 | 2004-11-11 | Fluidised sealed material return device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420111359 CN2747467Y (en) | 2004-11-11 | 2004-11-11 | Fluidised sealed material return device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2747467Y true CN2747467Y (en) | 2005-12-21 |
Family
ID=35708006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420111359 Expired - Lifetime CN2747467Y (en) | 2004-11-11 | 2004-11-11 | Fluidised sealed material return device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2747467Y (en) |
Cited By (6)
| 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 |
| CN100552293C (en) * | 2006-10-25 | 2009-10-21 | 中国科学院工程热物理研究所 | Circulating fluidized bed boiler multiple-point return feeder |
| CN101986030B (en) * | 2009-07-29 | 2012-10-03 | 中国科学院工程热物理研究所 | Material circulating device with sorting function |
| CN103912871A (en) * | 2014-04-15 | 2014-07-09 | 国家电网公司 | Seal valve material returning system for chemical loop combustion system |
| CN105042598A (en) * | 2014-04-16 | 2015-11-11 | 荏原环境工程株式会社 | Swirling type fluidized bed furnace |
| CN109625975A (en) * | 2018-12-25 | 2019-04-16 | 西安交通大学 | A kind of submicron particles, which fluidize, gives powder device |
-
2004
- 2004-11-11 CN CN 200420111359 patent/CN2747467Y/en not_active Expired - Lifetime
Cited By (7)
| 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 |
| CN100552293C (en) * | 2006-10-25 | 2009-10-21 | 中国科学院工程热物理研究所 | Circulating fluidized bed boiler multiple-point return feeder |
| CN101986030B (en) * | 2009-07-29 | 2012-10-03 | 中国科学院工程热物理研究所 | Material circulating device with sorting function |
| CN103912871A (en) * | 2014-04-15 | 2014-07-09 | 国家电网公司 | Seal valve material returning system for chemical loop combustion system |
| CN103912871B (en) * | 2014-04-15 | 2016-03-16 | 国家电网公司 | For the seal valve revert system of burning chemistry chains system |
| CN105042598A (en) * | 2014-04-16 | 2015-11-11 | 荏原环境工程株式会社 | Swirling type fluidized bed furnace |
| CN109625975A (en) * | 2018-12-25 | 2019-04-16 | 西安交通大学 | A kind of submicron particles, which fluidize, gives powder device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102042600B (en) | Circulating fluidized bed refuse incineration boiler | |
| CN110260301B (en) | Ultralow-emission energy-saving biomass circulating fluidized bed boiler | |
| TW201533392A (en) | Superheated steam boiler of horizontal circulating fluidizing bed | |
| CN106838892A (en) | A kind of energy-efficient Circulating Fluidized Bed Boiler of low nitrogen | |
| CN101586805B (en) | Combustion device for biomass granular fuel | |
| CN201526976U (en) | Refuse-fired boiler for circulating fluidized bed | |
| CN2747467Y (en) | Fluidised sealed material return device | |
| CN202082915U (en) | W-shape flame boiler with grading secondary air layout structure | |
| CN104990086A (en) | Fluidized bed garbage incinerator | |
| CN1312431C (en) | Sealed fluid back-feeder | |
| CN201582805U (en) | Biomass-energy circulating fluidized bed boiler with low energy consumption | |
| CN206398704U (en) | A kind of multi fuel multifuel combustion fluidized-bed combustion boiler | |
| CN1313766C (en) | Method of fluidizing wind at high pressure using steam to replace air | |
| CN100441952C (en) | Composite circulating fluidized bed system for high performance clean burning of urban domestic garbage | |
| CN210462983U (en) | Ultralow-emission energy-saving biomass circulating fluidized bed boiler | |
| CN102095254B (en) | Organic heat carrier boiler of fluidized bed, with low cost, environment protection, energy saving and emission reduction | |
| CN205299488U (en) | Environmental protection and energy saving type circulating fluidized bed boiler | |
| CN210107373U (en) | Biomass fluidized bed boiler with external bed high-temperature separation mode | |
| CN101054537A (en) | Chilling device for up coal gas of high temperature | |
| CN211260748U (en) | High-temperature and high-pressure steam boiler of pure-burning biomass environment-friendly circulating fluidized bed | |
| CN207112788U (en) | A kind of boiler revert system | |
| CN209196834U (en) | Gasified combustion apparatus | |
| CN111102563A (en) | Clean power generation method by blending and burning coal slime based on low-position coal slime feeding mode | |
| CN111102566A (en) | Clean power generation method by blending and burning coal slime in large circulating fluidized bed boiler | |
| CN111102565A (en) | Method for controlling emission of pollutants generated by mixed combustion of coal slime |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20041111 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |