CN203212532U - Fluidized bed powder coal gasifier gas distribution plate - Google Patents
Fluidized bed powder coal gasifier gas distribution plate Download PDFInfo
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- CN203212532U CN203212532U CN 201320135649 CN201320135649U CN203212532U CN 203212532 U CN203212532 U CN 203212532U CN 201320135649 CN201320135649 CN 201320135649 CN 201320135649 U CN201320135649 U CN 201320135649U CN 203212532 U CN203212532 U CN 203212532U
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Abstract
The utility model relates to a fluidized bed powder coal gasifier gas distribution plate which is composed of a furnace wall (4), a conical gas distribution plate (1), a distribution plate gas inlet pipe (8) and a gas outlet (2), wherein the conical gas distribution plate (1) is in the shape of an inverted cone; the upper end of the conical gas distribution plate (1) is connected with the lower end of a transitional connecting section (10); the lower end of the conical gas distribution plate (1) is connected with the upper end of a reducing pipe (7); the lower end of the reducing pipe (7) is connected with an annular separation pipe (9); the upper end of the transitional connecting section (10) is connected with the lower end of a guide variable-diameter plate (3); the upper end of the guide variable-diameter plate (3) is connected with the furnace wall (4); the conical gas distribution plate (1) is provided with uniformly distributed gas outlets (2); the conical gas distribution plate (1), guide variable-diameter plate (3), reducing pipe (7) and annular separation pipe (9) constitute a cylindrical gas inlet chamber; the distribution plate gas inlet pipe (8) is arranged in the cylindrical gas inlet chamber; and the lower part of the cylindrical gas inlet chamber is provided with a heat insulating material (6). The utility model has the advantages of low operating cost and no slag on the furnace wall, and can adapt to the large-size fluidized bed powder coal gasifier.
Description
Technical field
The utility model belongs to a kind of gas distribution grid, is specifically related to a kind of ash fusing fluidized bed vapourizing furnace reactor and multistage classification and transforms the fluidized-bed gasification furnace gas distribution grid.
Background technology
Grid distributor is an important component part of fluidized bed plant, it is the key part that ash fusing fluidized bed vapourizing furnace and multistage classification transform fluidized-bed gasification furnace, and ash fusing fluidized bed and multistage classification are transformed the fluidisation of fluidized-bed for it and the processing property of gasifying reactor all has decisive influence.Particularly the grid distributor role comprises:
1) vaporized chemical that evenly distributes makes vaporized chemical pass through the energy consumption minimum of grid distributor simultaneously, and it is stable that fluidized-bed is in, and this can be by regulating the percentage of open area of the height of bed and grid distributor, and the structure of adjusting pre-distributor realizes;
2) guarantee to form good gas-solid contact condition near the grid distributor, so that all coal tars all are kept in motion, thereby eliminate the dead band, and then prevent near the slagging scorification grid distributor, influence the vapourizing furnace operation, this can give and adjusting by structure and the operating parameters of regulating grid distributor;
3) guarantee that grid distributor lower edge material enters the ring pipe zone of action smoothly, make particle be in recurrent state preferably and the coal tar that will react enters ash bucket by the ring pipe place, thus raising vapourizing furnace efficient and treatment capacity;
4) promote fluid and intergranular heat transfer, mass transfer, can also prevent from occurring bottom the Bian Biqu dead band and particle effectively at the adhesive aggregation at grid distributor place.
Shanxi Inst. of Coal Chemistry, Chinese Academy of Sciences succeeded in developing " ash fusing fluidized bed gasification and device " (application number: 94106781.5), coal wide ranges (from brown coal to the hard coal), and be fit to high ash, high-sulfur, high ash melting point gasification.Finish at present the industrial application of 320 tons of high sulphur coal of 100 tons of normal pressure day outputs and 0.6MPa pressurization day output, on 3.0MPa pressurization pilot plant, finished the molten gather qi together experiment of 0.6-2.5MPa hard coal pressurization ash simultaneously.But compare with advanced person's Coal Gasification Technology and to remain: 1) vapourizing furnace scale big (industrial single stove treatment capacity 300 ton per days at present) inadequately; 2) can not long-term operation (single stove can normally move 30 days) because of slagging scorification on the full scale plant.Simultaneously Shanxi Inst. of Coal Chemistry, Chinese Academy of Sciences research and develop " method and device that the multistage classification transforms the fluidized bed coal gasification " (application number: 201010291577.4), and the multistage classification to transform the bottom of fluidized-bed be based on ash fusing fluidized bed.
The maximization that the realizes vapourizing furnace trend that is inevitable, the key that vapourizing furnace maximizes is flexible design high-quality grid distributor.
The distributing plate structure that ash fusing fluidized bed vapourizing furnace uses in the prior art is comparatively single, major portion is a circular cone gas distribution grid, the circular cone gas distribution grid is provided with equally distributed pneumatic outlet, make vaporized chemical along the direction ejection perpendicular to the circular cone gas distribution grid, can eliminate the dead band, prevent that fine coal from falling into inlet plenum, make fine coal can enter annular area under control and fluerics preferably simultaneously, and then make particle be in the good circulation state and selectively separate semicoke and lime-ash.
Yet to the operating practice discovery for many years of the molten poly-vapourizing furnace of the ash that adopts this class grid distributor, there is following problem in this class grid distributor when actual production by us:
1) easily in slagging scorification on the furnace wall of circular cone gas distribution grid upper limb, makes slag tie bigger and bigger during the continuous industry operation, and then be forced to stop;
2) in the process that the vapourizing furnace furnace diameter amplifies and vapourizing furnace pressure improves, reach gas-solid flow state preferably in the vapourizing furnace for making, required fluidized gas is large-minded, and this part fluidized gas tolerance is required vaporized chemical consumption in the coal gasification course, and then cause the waste of portion gas, strengthen cost of investment, caused the content of active principle in the coal gas to reduce simultaneously.
Summary of the invention
The purpose of this utility model provides that a kind of running cost is low, and the furnace wall does not have slagging scorification, and can be suitable for the gas distribution grid that has guide plate of large-scale fluidized bed powder coal gasification furnace.
Gas distribution grid of the present utility model is by the furnace wall, the circular cone gas distribution grid, grid distributor inlet pipe and pneumatic outlet are formed, it is characterized in that the circular cone gas distribution grid is inverted cone shape, circular cone gas distribution grid upper end connects transition linkage section lower end, circular cone gas distribution grid lower end connects the reducing pipe upper end, the reducing pipe lower end connects annular separator tube, transition linkage section upper end connects guiding reducing plate lower end, guiding reducing plate upper end is connected with the furnace wall, equally distributed pneumatic outlet is arranged on the circular cone gas distribution grid, by the circular cone gas distribution grid, guiding reducing plate, reducing pipe, the annular release pipe constitutes cylindrical inlet plenum, the grid distributor inlet pipe is arranged in inlet plenum, in cylindrical air chamber bottom lagging material is arranged.
The angle of aforesaid guiding reducing plate and furnace wall is 5 °-40 °, and the distance of guiding reducing plate upper limb and circular cone gas distribution grid upper limb is 0.5 – 2 with the ratio of vapourizing furnace diameter.Circular cone gas distribution grid and guiding reducing plate all have fire-resistant and the lagging material formation.
The percentage of open area of aforesaid circular cone gas distribution grid is 0.8%-9%, and the aperture is Φ 2-6mm, and the angle of element of cone and furnace wall is α=40 °-70 °, ° is good with α=50, and the hole that the circular cone gas distribution grid is opened is vertical with element of cone.
Fluid bed powder coal gasification stove reactor distributing plate of the present invention has been compared following advantage with the grid distributor of prior art:
1) require and the coal requirement according to treatment capacity, can adjust the size of guiding reducing plate and circular cone gas distribution grid flexibly, thereby satisfy requirements of different users, make that the grid distributor design flexibility is strong, snappiness is strong.Than the prior art distribuor of fluidized bed, when reaching gas-solid flow state preferably in the vapourizing furnace, fluidized gas required for the present invention reduces, and then has reduced industrial cost.
2) easily slagging scorification on the furnace wall that separates fabric swatch upper limb certain distance of the ash fusing fluidized bed grid distributor of prior art, angle by making guiding reducing plate and furnace wall is 5 °-40 °, the distance that guiding reducing plate separates the fabric swatch upper limb is 0.5-2 with the ratio of vapourizing furnace diameter, and then make the concentration of grid distributor place coal strengthen, reduce oxygen and moved back to the probability at guiding reducing plate place, and then reduced ash fusing fluidized bed slagging scorification probability.
3) grid distributor of the present invention can be amplified to 4.8 meters so that the vapourizing furnace furnace diameter is more effective, and day output can reach 1300 tons when pressure is 4.0MPa, can be used for medium-scale industry fluid bed powder coal gasification stove.
Description of drawings
Fig. 1 is fluid bed powder coal gasification stove reactor distributing plate structural representation;
Fig. 2 is the partial enlarged drawing of I among Fig. 1;
Fig. 3 is fluid bed powder coal gasification stove reactor distributing plate structure schematic top plan view.
As shown in the figure, the 1st, circular cone gas distribution grid, the 2nd, pneumatic outlet, the 3rd, guiding reducing plate, the 4th, furnace wall, the 5th, cylindrical air chamber, the 6th, lagging material, the 7th, reducing pipe, the 8th, grid distributor inlet pipe, the 9th, annular release pipe, the 10th, transition linkage section.
Embodiment
Describe concrete structure of the present invention and preferred forms in detail below in conjunction with accompanying drawing.
Embodiment 1
Gas distribution grid is by furnace wall 4, circular cone gas distribution grid 1, grid distributor inlet pipe 8 and pneumatic outlet 2 are formed, circular cone gas distribution grid 1 is inverted cone shape, and circular cone gas distribution grid 1 upper end connects transition linkage section 10 lower ends, and circular cone gas distribution grid 1 lower end connects reducing pipe 7 upper ends, reducing pipe 7 lower ends connect annular separator tube 9, transition linkage section 10 upper ends connect guiding reducing plate 3 lower ends, and guiding reducing plate 3 upper ends are connected with furnace wall 4, and the angle of guiding reducing plate and furnace wall is 5 °.Equally distributed pneumatic outlet 2 is arranged on the circular cone gas distribution grid 1, and the percentage of open area of circular cone gas distribution grid 1 is 9%, and the aperture is Φ 4mm, and the angle of element of cone and furnace wall 4 is α=40 °.The hole that circular cone gas distribution grid 1 is opened is vertical with element of cone.Constitute cylindrical inlet plenum by circular cone gas distribution grid 1, guiding reducing plate 3, reducing pipe 7, annular release pipe 9, grid distributor inlet pipe 8 is arranged in cylindrical inlet plenum, in cylindrical air chamber bottom lagging material 6 is arranged.The distance H of guiding reducing plate (3) upper limb and circular cone gas distribution grid (1) upper limb is 1 with the H/D ratio of vapourizing furnace diameter D.
The angle of guiding reducing plate and furnace wall is 25 °.Percentage of open area is 0.8%, and the aperture is Φ 6mm, and the angle of element of cone and furnace wall 4 is α=50 °.The H/D ratio is 0.5.All the other are with embodiment 1.
Embodiment 3
The angle of guiding reducing plate and furnace wall is 40 °.Percentage of open area is 4%, and the aperture is Φ 2mm, and the angle of element of cone and furnace wall 4 is α=70 °.The H/D ratio is 2.All the other are with embodiment 1.
Be 1300 tons/day by day output, use the grid distributor of above-described embodiment to carry out cold conditions operation and computer simulation in the laboratory, carried out hot operation at hot device, investigated the grid distributor effect and can obtain gasification result preferably.
1) laboratory cold conditions service data
Material: raw coal, polystyrene
Service data: the grid distributor that 1. adopts the present invention such as Fig. 1, utilize camera photography, the analysis of frame process software, optical fiber particle knotmeter, discover that big space does not appear in the following Bian Biqu of reactor guiding reducing plate, show that the oxygen in the vaporized chemical is difficult to enter guiding reducing plate place by this space, simultaneously particle motion is all right, and then guiding reducing plate place will can slagging scorification.
2) computer simulation service data
Utilize cfdrc to carry out digital simulation to adopting the present invention's grid distributor as shown in Figure 1, wall place, limit granule density, particle velocity and internal circulating load have mainly been investigated, when adopting grid distributor shown in Figure 1, wall place, limit particle is in concentrated phase area all the time, the probability of bubble appears close to 0, show that oxygen is difficult to cause the vapourizing furnace slagging scorification by the form that bubble is played a reversed role, particle motion is all right simultaneously
3) hot operation on the hot device
Reaction mass: brown coal, bituminous coal, hard coal
Mainly to adopting grid distributor as shown in Figure 1 to operate, be under the working pressure of 0.6MPa, 1.0MPa, 2.0MPa at pressure, on the vapourizing furnace pilot plant, move 72 hours continuously, high temperature dot does not appear in the temperature sensor at vapourizing furnace in service bottom and limit wall place, wall place, blowing out back does not have to find bigger clinker, showing does not have slagging scorification in the gasifier operation, more stable.
Claims (4)
1. fluid bed powder coal gasification furnace gases grid distributor, it is furnace wall (4), circular cone gas distribution grid (1), grid distributor inlet pipe (8) and pneumatic outlet (2) are formed, it is characterized in that circular cone gas distribution grid (1) is inverted cone shape, circular cone gas distribution grid (1) upper end connects transition linkage section (10) lower end, circular cone gas distribution grid (1) lower end connects reducing pipe (7) upper end, reducing pipe (7) lower end connects annular separator tube (9), transition linkage section (10) upper end connects guiding reducing plate (3) lower end, guiding reducing plate (3) upper end is connected with furnace wall (4), equally distributed pneumatic outlet (2) is arranged on the circular cone gas distribution grid (1), by circular cone gas distribution grid (1), guiding reducing plate (3), reducing pipe (7), annular release pipe (9) constitutes cylindrical inlet plenum, grid distributor inlet pipe (8) is arranged in cylindrical inlet plenum, in cylindrical air chamber bottom lagging material (6) is arranged.
2. a kind of fluid bed powder coal gasification furnace gases grid distributor as claimed in claim 1, the angle of reducing plate (3) and furnace wall (4) of it is characterized in that leading is 5 °-40 °, and the distance of guiding reducing plate (3) upper limb and circular cone gas distribution grid (1) upper limb is 0.5 – 2 with the ratio of vapourizing furnace diameter.
3. a kind of fluid bed powder coal gasification furnace gases grid distributor as claimed in claim 1, the percentage of open area that it is characterized in that described circular cone gas distribution grid (1) is 0.8%-9%, the aperture is Φ 2-6mm, the angle of element of cone and furnace wall (4) is α=40 °-70 °, and the hole that circular cone gas distribution grid (1) is opened is vertical with element of cone.
4. a kind of fluid bed powder coal gasification furnace gases grid distributor as claimed in claim 3, the angle that it is characterized in that described element of cone and furnace wall (4) are α=50 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320135649 CN203212532U (en) | 2013-03-22 | 2013-03-22 | Fluidized bed powder coal gasifier gas distribution plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320135649 CN203212532U (en) | 2013-03-22 | 2013-03-22 | Fluidized bed powder coal gasifier gas distribution plate |
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| CN203212532U true CN203212532U (en) | 2013-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320135649 Expired - Lifetime CN203212532U (en) | 2013-03-22 | 2013-03-22 | Fluidized bed powder coal gasifier gas distribution plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104667698A (en) * | 2015-01-19 | 2015-06-03 | 中冶长天国际工程有限责任公司 | Absorption tower and air inlet passage of heating gas thereof |
| CN104673397A (en) * | 2015-01-26 | 2015-06-03 | 新奥科技发展有限公司 | Fluidized bed gas distributor and gasifier |
-
2013
- 2013-03-22 CN CN 201320135649 patent/CN203212532U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104667698A (en) * | 2015-01-19 | 2015-06-03 | 中冶长天国际工程有限责任公司 | Absorption tower and air inlet passage of heating gas thereof |
| CN104667698B (en) * | 2015-01-19 | 2017-07-25 | 中冶长天国际工程有限责任公司 | A kind of Analytic Tower and its hot gas inlet channel |
| CN104673397A (en) * | 2015-01-26 | 2015-06-03 | 新奥科技发展有限公司 | Fluidized bed gas distributor and gasifier |
| CN104673397B (en) * | 2015-01-26 | 2017-03-01 | 新奥科技发展有限公司 | A kind of gas distributor of fludized bed and gasification furnace |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130925 |
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| CX01 | Expiry of patent term |