CN202390395U - High density circulating fluidized bed device of four-point air-inflated structure used B category particle - Google Patents
High density circulating fluidized bed device of four-point air-inflated structure used B category particle Download PDFInfo
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- CN202390395U CN202390395U CN2011205570338U CN201120557033U CN202390395U CN 202390395 U CN202390395 U CN 202390395U CN 2011205570338 U CN2011205570338 U CN 2011205570338U CN 201120557033 U CN201120557033 U CN 201120557033U CN 202390395 U CN202390395 U CN 202390395U
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- riser tube
- fluidized bed
- circulating fluidized
- inflation
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Abstract
The utility model relates to a high density circulating fluidized bed device of a four-point air-inflated structure used B category particle, which relates to clean energy technology. An experiment table system comprises an air feed system, a main bed system, a gas-solid separation system and a material returning system. The air feed system is provided through an air compressor. The main bed system is formed by a wind distribution board and a lifting tube. The gas-solid separation system is formed by a cyclone separator. The material returning system is composed of a material foot and a J-valve material returning device. Three air inflation points are asymmetrically distributed on the bottom portion of the lifting tube, and an air inflation point is distributed at the position of an outlet on the top portion of the lifting tube. The high density circulating fluidized bed device can be used for river basin character analysis and mechanism survey of a high density circulating fluidized bed using the B category particle. Flow of the B category particle in the tube is even by adjusting air quantity of the air inflation points. The high density circulating fluidized bed device is simple in structure, convenient to operate, and capable of well solving the problem that particle concentration at the bottom of the lifting tube of the high density circulating fluidized bed is high so that particle flow is uneven, and the particle on the top portion of the lifting tube using a strong restrain outlet is aggregated so that the particle flow is uneven.
Description
Technical field
The utility model relates to the clean energy technology field, is that a kind of 4 pneumatic structures are used category-B particulate high-density circulating fluidized bed device.
Background technology
The high-density circulating fluidized bed is of new generation efficient, the oligosaprobic clean energy technology that grows up in the world in recent years; Can under higher operating gas velocity and solid flux, move, have that bed endoparticle density is high, gas-solid mix strong, treatment capacity is big, the characteristics of applied range.Yet; Research to the high-density circulating fluidized bed at present shows, because higher granule density in the bed, riser tube is endocorpuscular mobile inhomogeneous; Especially in riser tube bottom and the riser tube top area with strong constraint export structure, radial and axial ununiformity is more obvious.This ununiformity has a strong impact on gas-solid biphase thorough mixing and the interior heat and mass efficient of bed, reduces the transformation efficiency and the utilization ratio of fuel, and the safe operation of device is brought hidden danger.
Pass through literature survey; Some scholars have done many work to the experimental study of high-density circulating fluidized bed system both at home and abroad; Also obtained to have the conclusion of reference; But the small category-A solid particulate design mostly research in the past is to use to the chemical field petroleum catalytic cracking, also need go deep into the research of using category-B particulate high-density circulating fluidized bed.In addition, in current experiments technology or device, also do not find, or the report of inflation point is set at riser tube top with strong constraint export structure in the riser tube bottom.
The utility model content
The purpose of the utility model provides a kind of 4 pneumatic structures and uses category-B particulate high-density circulating fluidized bed device; To the research of using category-B particulate high-density circulating fluidized bed,, the inflation point is set at particle agglomeration phenomenon serious riser tube bottom and top; Weaken the agglomeration of particle flow; To improve the homogeneity and the stability of Gas-solid Two-phase Flow, reach the transformation efficiency and the utilization ratio of fuel, the safe operation of assurance device.
To achieve these goals, the technical solution of the utility model is:
A kind of 4 pneumatic structures are used category-B particulate high-density circulating fluidized bed device; The cyclonic separator upper end is outlet; Lower end edge axis affixed blanking material pipe, blanking material pipe bottom is a J valve material returning device, riser tube and cyclonic separator, blanking material pipe parallel vertical are provided with; Riser tube upper end is the strong constraint export structure, and is affixed through horizontal pipe and cyclonic separator upper portion side wall, and inner chamber interlinks, and the riser tube lower end is affixed through oblique pipeline and J valve material returning device sidewall, and inner chamber interlinks; There is air distribution plate the riser tube bottom;
It is being provided with three asymmetrically distributed inflation points on riser tube lower sides: one-level inflation point is below; Be positioned at oblique pipeline on opposite external side wall above the outlet of riser tube side; Three grades of inflation points are positioned at outside the riser tube on the sidewall; / 4th places apart from the lower end, the secondary inflation is put on the riser tube inside side walls, vertically between putting in one-level, three grades of inflations;
Roof is provided with level Four inflation point in the riser tube upper end;
Two air compressor machines, the delivery port of first air compressor machine is connected with one-level, secondary, three grades, level Four inflation point respectively through many pipelines, is provided with a manual valve in the every pipeline; The delivery port of second air compressor machine interlinks with the air distribution plate of riser tube bottom, the J valve material returning device of blanking material pipe bottom respectively through two pipelines, is provided with a manual valve in the every pipeline;
Test macro comprises a plurality of pressure transmitters, a plurality of TP, a plurality of mass flowmeter, and pressure transmitter, TP, mass flowmeter are located at respectively on sidewall, the pipeline, and is electrically connected with IPC through transmitting module separately.
Described high-density circulating fluidized bed device, its said one-level, secondary, three grades, level Four inflation point, wherein, the mouth that fills of one-level inflation point is provided with obliquely, from the horizontal by the ω angle, 58 °＜ω＜62 °; Secondary, three grades, level Four inflation point fill that mouth is oblique to be provided with down; Secondary inflation point fills mouth from the horizontal by the β angle, 43 °＜β＜46 °; Three grades of inflation points fill mouth from the horizontal by the θ angle, 28 °＜θ＜32 °; Level Four inflation point fills mouth from the horizontal by the α angle, 28 °＜α＜32 °.
Described high-density circulating fluidized bed device, the oblique pipeline of its said riser tube lower end is higher than the inlet of J valve material returning device side in the outlet of riser tube side.
Described high-density circulating fluidized bed device, its said riser tube, blanking material pipe, J valve material returning device are that pmma material is made, cyclonic separator, air distribution plate are that steel are made; Air distribution plate is provided with equally distributed a plurality of wind hole, and aperture, wind hole is 8mm＜Φ＜10mm.
Described high-density circulating fluidized bed device, its working process is following:
A) at first, the Solid Bed material is added in blanking material pipe, the J valve material returning device, open second air compressor machine;
B) open manual valve, one road pressurized air gets in the riser tube through intake ducting and air distribution plate, and a part of gas gets into J valve material returning device bottom through intake ducting;
C) open first air compressor machine, the total pressure drop in the pressure sensor monitoring riser tube of treating on riser tube, to install reaches certain index Δ P
OpeThe time, regulate four manual valves before the inflation point, make four road pressurized air get into riser tube through intake ducting respectively;
This index is by formula Δ P=ε
sρ
pG Δ h confirms that wherein Δ P is pressure drop, ε
sBe average body integration rate, the ρ of solid particulate in bed
pBe that pellet density, g are that universal gravity constant, Δ h are height,, work as ε according to the definition of high-density circulating fluidized bed
s=10% o'clock, the gas-solid in the riser tube was flowed and is reached the requirement of high-density circulating fluidized bed, can estimate the riser tube total pressure drop Δ P under this condition
TotalHere get Δ P
Ope=0.5 Δ P
Total
D) adjust the aeration quantity of each inflation point, monitor the voltage drop value of each pressure-measuring-point, realized required operating mode when reaching following standard: 1. by formula ε
s=ρ
pG Δ P/ Δ h calculates the interior average particle concentration of riser tube and reaches 10%; 2. the pressure drop between inflation point 7 and the inflation point 5 is designated as Δ P
5-7, satisfy scope: 0.15 Δ P
Total＜Δ P
5-7＜0.4 Δ P
Total3. by formula G
s=ρ
PA
SpurH
Spur/ A
fT (G wherein
sBe solid flux, A
SpurArea, H for tremie pipe
SpurBe measured altitude, A
fFor area, the t of riser tube is Measuring Time) G that calculates
s＞200kg/ (m
2.s).
E) simultaneously through observing the mobility status in the riser tube, two flow feature and mechanism in the use category-B particulate high-density circulating fluidized bed are analyzed summary.
The structure design of this 4 inflations of the utility model can solve particle agglomeration preferably, the uneven problem of particle flow.
The utility model apparatus structure is simple, easy to operate.It is higher to solve high-density circulating fluidized bed riser tube bottom granule density preferably, and particle flow is inhomogeneous; And the riser tube top particle agglomeration that uses the strong constraint outlet, the uneven problem of particle flow.
The utility model relies on the support of gas-solid flowing law and gasification reaction Study on Mechanism in Poly-generation demonstration project and the project of national nature science fund project-conveying-bed coal vapourizing furnace on country's " 863 Program " energy field major project-turn to coal gas basis.Its vapourizing furnace uses the category-B particle, through high solid concentration in the reactor drum and high solid flux, realizes high efficient gas-solid mixing, heat and mass, chemical reaction process.This technology is applicable to low-rank coal and the low grade coal that China's reserves are huge and present technology is difficult to effectively utilization, has high-level efficiency, low cost simultaneously and safeguards characteristics such as simple, is the important directions of advanced gasification technology development.
Description of drawings
Fig. 1 is that a kind of 4 pneumatic structures of the utility model are used category-B particulate high-density circulating fluidized bed device structural representation; Among the figure:
Three grades of inflation points 7; Riser tube 8; Level Four inflation point 9;
Embodiment
See Fig. 1, use category-B particulate high-density circulating fluidized bed device, constitute by airing system, main bed system, separation system, revert system and test macro for a kind of 4 pneumatic structures of the utility model.Comprise: two air compressor machines 1,14, a plurality of manual valve 15, a plurality of pressure transmitter 2, a plurality of TP 3, a plurality of mass flowmeter 4, air distribution plate 6, riser tube 8, cyclonic separator 10, blanking material pipe 11, J valve material returning device 12.Wherein, in riser tube 8 bottoms of using category-B particulate high-density circulating fluidized bed, three inflations of asymmetric distribution point on the top of riser tube 8 top strong constraint outlets, is arranged an inflation point.(reference is its middle-high density circulating fluidized bed: J.R.Grace according to Grace etc.; A.S.Issangya; D.Bai.Situating the high-density circulating fluidized bed [J] .AIChE J.; 1999,45 (10): the standard that 2108-2116.) proposes defines, that is: the solid flux G in unit bed cross section
sGreater than 200kg/ (m
2.s); The average body integration rate ε of solid particulate in bed
sGreater than 10%.
Airing system is made up of first air compressor machine 1 and second air compressor machine 14, and wherein first air compressor machine 1 provides the source of the gas of four inflation points 5,7,9 and 13, and second air compressor machine 14 provides the source of the gas of riser tube 8 and J valve material returning device 12.Use first, second two air compressor machines 1,14 to supply with the source of the gas of 4 inflations and the source of the gas of riser tube and material returning device respectively, can reduce because the situation of system's fluctuation of service that adjusting tolerance causes.Main bed system is made up of air distribution plate 6 and riser tube 8.The material of air distribution plate 6 is a steel plate, on air distribution plate 6, is provided with equally distributed a plurality of wind hole.Air distribution plate 6 makes the pressurized air that gets into riser tube 8 be evenly distributed on the one hand; In addition because the less (8mm＜Φ＜10mm) of the perforate of air distribution plate 6; Gas increases through the speed that the wind hole gets into riser tube 8, can play to prevent that solid materials from falling the effect of stopping up source of the gas after rise.The material of riser tube 8 is a synthetic glass, in order that the convenient mobility status of material in pipe of observing.Riser tube 8 main effects are the passages as two-phase flow, and dense-phase conveying is also realized in riser tube 8 simultaneously.Arrange that near a side of J valve material returning device 12 an oblique secondary inflation down from the horizontal by β angle (43 °＜β＜46 °) puts 13 at riser tube 8.Arrange two inflation points at the opposite side of riser tube: 5 and three grades of inflation points 7 of one-level inflation point; Wherein one-level inflation point 5 from the horizontal by the ω angle (58 °＜ω＜62 °) arrange obliquely; (28 °＜θ＜32 °) are oblique from the horizontal by the θ angle arranges down for three grades of inflation points 7, and secondary inflation point 13 is arranged between 5 and three grade 7 of the one-level inflation point.This structure can function as follows: when particle when J valve material returning device 12 gets into riser tubes 8; A large amount of particles stop in riser tube 8 bottoms even pile up; Air-flow by 5 ejections of one-level inflation point dispels particle on the one hand; Promote the gas-solid contact, strengthen gas-solid biphase momentum-exchange, particle motion is carried out the homogenizing processing first time.Obliquely air-flow cooperates the main bed wind of riser tube 8 to carry more particles to move upward on the other hand.When particle motion arrives the height of secondary inflation point 13, fierce momentum-exchange fully will take place with particle in the oblique downstream of secondary inflation point 13 ejections, and the cluster of grains that part is little is broken up, and particulate motion experience homogenizing is for the second time handled.When particle motion arrives riser tube height 1/4 place, three grades of inflation points 7 arranging herein will carry out homogenizing processing for the third time to the particulate motion.In addition; Three grades of inflation points 7 and secondary inflation point 13 are designed to the structure under oblique, can relax riser tube 8 bottom particulate high-speed motions, weaken the particulate agglomeration; Increase the residence time of particle in bed; And then strengthen biphase thorough mixing and the interior heat and mass of bed, and promote the abundant reaction of fuel, improve transformation efficiency and utilization ratio.In order to solve the problem of the particle aggregation that the strong constraint export structure produces; In riser tube (8) top design of the utility model device from the horizontal by the α angle (28 °＜α＜32 °) and towards the oblique following formula level Four inflation point 9 of cyclonic separator 10; This structure has three effects: play the effect that weakens the top particle agglomeration on the one hand; One side reduces the particle of inflation generation downwards and the loss of gas kinetic energy as far as possible, is that particle increases power-assisteds to cyclonic separator 10 motions at last.The gas solid separation system is made up of cyclonic separator 10, since the quick eddying motion of particulate, cyclonic separator 10 serious wear, and the material selection steel plate is to increase work-ing life.Revert system is made up of blanking material pipe 11 and J valve material returning device 12.The material of blanking material pipe 11 and J valve material returning device 12 is synthetic glass, so that observe the particle flow characteristic in it.Test macro is mainly measured pressure, temperature, gas flow.Wherein the measurement of pressure, temperature and gas flow realizes through pressure transmitter 2, rotor quality under meter 4 and TP 3 respectively, and links to each other with IPC (not illustrating among the figure) through transmitting module separately, realizes showing in real time.In addition, obtain the gas flow of needs through control manual valve 15.
The working process of this utility model device:
At first, a certain amount of Solid Bed material is added in blanking material pipe 11 and the J valve material returning device 12.Open air compressor machine 14, open manual valve 15, one road pressurized air gets in the riser tube 8 through intake ducting and air distribution plate 6, and a part of gas gets into J valve material returning device 12 bottoms through intake ducting.Open air compressor machine 1, when treating that the pressure sensor monitoring riser tube internal drop of on riser tube, installing reaches certain index, regulate four manual valve 15, four road pressurized air before the inflation point and get into riser tube 8 through intake ducting respectively.In experimentation; Pressure through each pressure measurement point; Get a promotion and manage the Solid Bed material distribution situation in 8; Adjust two air compressor machines, 1,14 tolerance through computational analysis then and realize required operating mode, and, two flow feature and mechanism in the use category-B particulate high-density circulating fluidized bed are analyzed summary through observing the mobility status in the riser tube 8.
Claims (4)
1. 4 pneumatic structures are used category-B particulate high-density circulating fluidized bed device; It is characterized in that the cyclonic separator upper end is outlet, lower end edge axis affixed blanking material pipe; Blanking material pipe bottom is a J valve material returning device, and riser tube and cyclonic separator, blanking material pipe parallel vertical are provided with; Riser tube upper end is the strong constraint export structure, and is affixed through horizontal pipe and cyclonic separator upper portion side wall, and inner chamber interlinks, and the riser tube lower end is affixed through oblique pipeline and J valve material returning device sidewall, and inner chamber interlinks; There is air distribution plate the riser tube bottom; It is characterized in that,
Be provided with three asymmetrically distributed inflation points on the riser tube lower sides: one-level inflation point is below; Be positioned at oblique pipeline on opposite external side wall above the outlet of riser tube side; Three grades of inflation points are positioned at outside the riser tube on the sidewall; / 4th places apart from the lower end, the secondary inflation is put on the riser tube inside side walls, vertically between putting in one-level, three grades of inflations;
Roof is provided with level Four inflation point in the riser tube upper end;
Two air compressor machines, the delivery port of first air compressor machine is connected with one-level, secondary, three grades, level Four inflation point respectively through many pipelines, is provided with a manual valve in the every pipeline; The delivery port of second air compressor machine interlinks with the air distribution plate of riser tube bottom, the J valve material returning device of blanking material pipe bottom respectively through two pipelines, is provided with a manual valve in the every pipeline;
Test macro comprises a plurality of pressure transmitters, a plurality of TP, a plurality of mass flowmeter, and pressure transmitter, TP, mass flowmeter are located at respectively on sidewall, the pipeline, and is electrically connected with IPC through transmitting module separately.
2. high-density circulating fluidized bed device as claimed in claim 1 is characterized in that, said one-level, secondary, three grades, level Four inflation point, and wherein, the mouth that fills of one-level inflation point is provided with obliquely, from the horizontal by the ω angle, 58 °＜ω＜62 °; Secondary, three grades, level Four inflation point fill that mouth is oblique to be provided with down; Secondary inflation point fills mouth from the horizontal by the β angle, 43 °＜β＜46 °; Three grades of inflation points fill mouth from the horizontal by the θ angle, 28 °＜θ＜32 °; Level Four inflation point fills mouth from the horizontal by the α angle, 28 °＜α＜32 °.
3. high-density circulating fluidized bed device as claimed in claim 1 is characterized in that, the oblique pipeline of said riser tube lower end is higher than the inlet of J valve material returning device side in the outlet of riser tube side.
4. high-density circulating fluidized bed device as claimed in claim 1 is characterized in that, said riser tube, blanking material pipe, J valve material returning device are that pmma material is made, and cyclonic separator, air distribution plate are that steel are made; Air distribution plate is provided with equally distributed a plurality of wind hole, and aperture, wind hole is 8mm＜Φ＜10mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205570338U CN202390395U (en) | 2011-12-28 | 2011-12-28 | High density circulating fluidized bed device of four-point air-inflated structure used B category particle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205570338U CN202390395U (en) | 2011-12-28 | 2011-12-28 | High density circulating fluidized bed device of four-point air-inflated structure used B category particle |
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|---|---|
| CN202390395U true CN202390395U (en) | 2012-08-22 |
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|---|---|---|---|
| CN2011205570338U Expired - Fee Related CN202390395U (en) | 2011-12-28 | 2011-12-28 | High density circulating fluidized bed device of four-point air-inflated structure used B category particle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103184076A (en) * | 2011-12-28 | 2013-07-03 | 中国科学院工程热物理研究所 | High density circulating fluidized bed device of four-point air-inflated structure used B category particle |
-
2011
- 2011-12-28 CN CN2011205570338U patent/CN202390395U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103184076A (en) * | 2011-12-28 | 2013-07-03 | 中国科学院工程热物理研究所 | High density circulating fluidized bed device of four-point air-inflated structure used B category particle |
| CN103184076B (en) * | 2011-12-28 | 2014-07-02 | 中国科学院工程热物理研究所 | High density circulating fluidized bed device of four-point air-inflated structure used B category particle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20201228 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |