CN102295114B - Feed tank and dry method feed system provided with feed tank - Google Patents
Feed tank and dry method feed system provided with feed tank Download PDFInfo
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- CN102295114B CN102295114B CN 201010217557 CN201010217557A CN102295114B CN 102295114 B CN102295114 B CN 102295114B CN 201010217557 CN201010217557 CN 201010217557 CN 201010217557 A CN201010217557 A CN 201010217557A CN 102295114 B CN102295114 B CN 102295114B
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Abstract
The invention discloses a feed tank and a dry method feed device using the feed tank. The feed tank comprises a tank body, a plurality of inlets arranged on the tank body, and a gas distributor communicated with fluid in the tank body. Solid powder and carrier gas are introduced from the inlets, and are mixed in the tank body to form a solid-gas mixture. The gas distributor inputs gas flow into the tank body to blow the solid-gas mixture radially towards the central shaft of the tank body. Since the gas flow blows the solid-gas mixture towards the central shaft of the tank body, the solid powder is prevented from aggregating in a large amount nearby the inner wall of the tank body, and the blowing of the gas flow also accelerates the flowing of the solid powder, thereby avoiding the emergence of rat holes and bridge formation.
Description
Technical field
The present invention relates to a kind of pressed powder (for example granular solids fuel) strength is delivered to as the dry feed system in the container of gasification furnace, refer in particular to a kind of have head tank structure, that make pressed powder stationary flow in course of conveying of improvement and the dry feed system that is provided with this head tank.
Background technology
The dry feed system generally includes head tank and several pipelines.Head tank receives pressed powder and carrier gas by pipeline, and forms solids and gas mixture within it.Then, this solids and gas mixture is exported from head tank, and by in the input of a pipeline (being called " mixture conduit ") the wherein gasification furnace.Stability that pressed powder flows in head tank and controllability play an important role to the gasification performance that obtains expectation.
Mostly several problems that existing dry feed system exists are to occur in the head tank, especially rat hole phenomenon or the arch formation in the high pressure charging jar.When the rat hole phenomenon occurring, the pressed powder major part accumulates in the position near the head tank inwall, thereby forms the gas passage of rat hole shape at the central part of head tank.Pressed powder relatively poor distributivity in head tank causes the pressed powder volume of input mixture pipeline and then input gasification furnace less.Arch formation is meant part pressed powder especially the pressed powder bonding or the caking of large-size, forms the phenomenon of building bridge in the bottom of head tank.The formative factor of arch formation is a lot, and for example the caking ability of pressed powder distributivity higher and pressed powder is relatively poor.Arch formation causes the mass flow rate of solid of pressed powder lower than normal circumstances, even the situation that gas does not go out pressed powder can occur only going out.Therefore rat hole phenomenon and arch formation all can cause the pressed powder flowing instability in the mixture conduit, and then cause the gasification furnace fluctuation of service.
At present, it is a lot of to prevent the method for rat hole phenomenon or arch formation.For example, head tank is designed to unsymmetric structure, or before pressed powder enters head tank, carries out the caking ability of drying steps, or beat head tank from the outside off and on the reduction pressed powder.
Yet extra drying steps causes energy consumption to increase, and beats head tank off and on and causes the mass flow rate of solid fluctuation that occurs not expecting, thereby cause the above-mentioned existing method all can't practical requirement.Therefore, need provide a kind of improved head tank, it can stably be exported pressed powder and then make pressed powder stationary flow in the course of conveying of dry feed system.
Summary of the invention
One embodiment of the present of invention provide a kind of head tank.This head tank comprises tank body, several are installed in import and gas distributor on the tank body.This import is introduced pressed powder and carrier gas tank body and mix the formation solids and gas mixture in tank body.This gas distributor and tank body fluid communication are to import air-flow in the tank body, and described air-flow is radial center shaft towards tank body and blows this solids and gas mixture.
Embodiments of the invention also provide a kind of dry feed system.This dry feed system comprises head tank and several and this head tank bonded assembly pipeline.This head tank comprises the gas distributor of tank body and fluid communication.This ducting pressed powder and carrier gas enter and form solids and gas mixture in this tank body, and delivery air enters gas distributor and blows this solids and gas mixture to be radial center shaft towards tank body.
Description of drawings
Be described for embodiments of the invention in conjunction with the drawings, in the hope of understanding the present invention better, in the accompanying drawings:
Fig. 1 is the front elevational schematic of the head tank of one embodiment of the invention;
Fig. 2 is the schematic perspective view of the dry feed system of another embodiment of the present invention, has excised the part of this dry feed system among the figure;
Fig. 3 is the enlarged drawing of the gas distributor of other another embodiment of the present invention;
Fig. 4 is the schematic perspective view of the nozzle on the gas distributor of other another embodiment of the present invention;
Fig. 5 is the schematic perspective view of the dry feed system of other another embodiment of the present invention, has excised the part of this dry feed system among the figure.
The specific embodiment
Fig. 1 has illustrated one embodiment of the present of invention head tank 10.This head tank 10 comprises tank body 12 and several imports and outlet.These imports comprise pressed powder inlet 14 and the carrier gas inlet 16 of introducing pressed powder 18 and carrier gas 20 respectively.Pressed powder 18 and carrier gas 20 mix formation solids and gas mixture 22 in tank body 12.Carrier gas 16 also can be called pressurising gas, and this pressurising gas keeps the pressure of tank body 12 to maintain certain level.When the mode of operation of an embodiment, the pressure in the head tank 10 is equal to, or greater than 3 MPas (Mpa).These outlets comprise the release outlet 24 of this solids and gas mixture 22 of output further to handle.In one embodiment, these outlets also comprise the blow off valve 25 of being located at head tank 12 tops, when the pressure of head tank 10 greater than preset level, this blow off valve 25 discharges carrier gas 16.
In one embodiment, air-flow 28 is the pulse gas that disperse the solids and gas mixture 22 in the tank body 12 off and on.In another embodiment, pulse gas is introduced in the tank body 12 serially, also can adopt variable flow size but continuous mode is introduced.Pulse gas provides power can for pressed powder 18, makes its generation be higher than the flow rate of general gas.
In one embodiment, these imports also comprise the fluidized gas inlet 29 that fluidized gas 30 is introduced from tank body 12 bottoms.Fluidized gas 30 is used for upwards this solids and gas mixture 22 of fluidisation, builds bridge to prevent that pressed powder 18 from stopping up or forming in the bottom of tank body 12, thereby guarantees the output volume stability of pressed powder 18.In another embodiment, head tank 10 is arranged to export solids and gas mixture 22 downwards, under the situation, 30 sidepieces from tank body 12 of fluidized gas are introduced like this.
Fig. 2 has illustrated the part-structure of another embodiment of the present invention dry feed system 32.This dry feed system 32 comprises head tank 34 and several and head tank 34 bonded assembly pipelines.The structure of head tank 34 is similar to head tank shown in Figure 1 10.In the embodiment shown in Figure 2, head tank 34 comprise tank body 36, connect several imports (indicating) of tank body 36 and corresponding pipeline and outlet (sign) and with the gas distributor 38 of tank body 36 fluid communication.In one embodiment, import and outlet are one with corresponding pipeline, are the parts of corresponding pipeline.
In one embodiment, these pipelines comprise carrier gas channel 40, solid pipeline 42 and mixture conduit 44.Carrier gas channel 40 and solid pipeline 42 are respectively applied for input carrier gas 46 and pressed powder 48 in tank body 36, form solids and gas mixture 50 to mix in tank body 36.In the present embodiment, use solid force (forcing) pump (not shown) that pressed powder 48 is injected in the tank body 36, the structure of this solid pipeline 42 is arranged to import shown in Figure 1 14 similar like this.Be understandable that in certain embodiments, solid pipeline 42 also can be arranged to the similar with carrier gas channel 40.
Head tank 34 shown in Figure 2 is arranged to export this solids and gas mixture 50 from its sidepiece, so this mixture conduit 44 is connected to head tank 34 sidepieces.In one embodiment, mixture conduit 44 has two or more inlets, these entrance extensions go in the tank body 36 and be positioned at gas distributor 38 below.In the embodiment shown in Figure 2, one of them inlet 41 is positioned at the position near head tank 34 centers, and two other inlet 43 is positioned at the position near head tank 34 inwalls.Two or more are set such as 41 and 43 inlet at diverse location, can have enlarged the mass flow rate of solid adjustable extent of pressed powder, thereby improved the alerting ability of control.
In one embodiment, dry feed system 32 comprises the mixture conduit that several are parallel.Each bar mixture conduit is provided with an inlet that extends into head tank 34.At least one mixture conduit is arranged to extend to the position near head tank 34 center shafts 54, and another mixture conduit is arranged to extend to position near head tank 34 inwalls at least.
Consult shown in Figure 2, gas distributor 38 and tank body 34 fluid communication, the air-flow 52 of conveying is radial and blows this solids and gas mixture 50 towards center shaft 54, has stoped pressed powder 48 to accumulate near tank body 34 inwalls.Should be noted in the discussion above that air-flow 52 blows solids and gas mixture 50 towards center shaft 45 and is meant that the flow direction of air-flow 52 and center shaft 54 intersect.In one embodiment, air-flow 52 is the pulse gas that disperse the solids and gas mixture 50 in the tank body 34 off and on.In another embodiment, pulse gas can be to introduce tank body 34 continuously, also can adopt variable flow size but continuous mode is introduced.Pulse gas provides power for pressed powder 48, makes its generation be higher than the flow rate of general gas.
Fig. 3 has illustrated a kind of structure of gas distributor shown in Figure 2 38.Consult Fig. 2 and shown in Figure 3, gas distributor 38 comprises outside delivery section 56, delivered inside portion 59 and injection portion 61.Outside delivery section 56 is introduced delivered inside portion 59 with air-flow 52 from a source of the gas (not shown).In one embodiment, outside delivery section 59 is not the part of gas distributor 38, but is arranged to have the structure identical with carrier gas channel 40.
Delivered inside portion 59 comprises several transfer tubes 58,60, and it is delivered to the diverse location place along center shaft 54 in the tank body 36 with air-flow 52.In one embodiment, injection portion 61 comprise several lay respectively in the tank body 36 along center shaft the ring pipe 62,64 at diverse location place.Ring pipe 62,64 and transfer tube 58,60 fluid communication are in order at the diverse location place jet-stream wind 52 along center shaft 54.In the present embodiment, delivered inside portion 59 has two transfer tubes, and injection portion 61 has two ring pipes.Yet, should be noted in the discussion above that the quantity of transfer tube and ring pipe and distance each other can be according to the sizes of head tank 34, the caking ability of pressed powder 48 and other system feature are adjusted.
In one embodiment, each ring pipe 62,64 comprises the nozzle that is used for jet-stream wind 52 66 that several extend to center shaft 54 from its inside diameter surface.In some applications, nozzle 66 is arranged to tiltedly down towards center shaft 54 blowing gas streams 52, and this spline structure setting can be avoided under the situation that does not have air-flow 52 pressed powder 48 plug nozzles 66 or enter (referring to Fig. 3) in the nozzle 66.This kind structure is arranged so that the flow direction of air-flow 52 and center shaft 54 acutangulate crossing.In one embodiment, the exit of nozzle 66 is provided with one and prevents that pressed powder from blocking the porous member of this outlet.In another embodiment, this porous member is made by the double burned metal powder.In other another embodiment, this porous member is made by the double burned metal braid.
Fig. 4 has illustrated to be positioned at an embodiment of the nozzle 68 on the ring pipe 62,64.Nozzle 68 comprises cylindrical portion 70 and the taper portion 71 along center shaft 54 extensions from cylindrical portion 70.In another embodiment, ring pipe 62,64 also can be within it be provided with the opening that several are used for jet-stream wind 52 on the surface, footpath, like this flow direction of air-flow 52 can with center shaft 54 quadratures.In other another embodiment, these openings are arranged to by changing the position of opening, and the flow direction of air-flow and center shaft 54 acute angles are intersected.
In one embodiment, gas distributor 38 is looped pipelines, and its end near the inlet 41,43 of mixture conduit 44 is an osed top.This looped pipeline is roughly concentric with tank body 36, and is removably mounted in the tank body 36.This looped pipeline surface within it is provided with several openings.These openings are arranged to the center shaft 54 towards tank body 36.It is circular given shape that these openings are not limited to be arranged to cross-sectional plane.Air-flow can blow pressed powder 48 by these openings towards center shaft 54 continuously, prevents the transmission failure such as rat hole and arch formation in head tank 34 with this.
Consult Fig. 2 once more, head tank 34 also comprises fluidized gas distributing box 67 that is fixed on its bottom interior wall and the fluidized gas pipeline 72 of introducing fluidized gas 74.In one embodiment, fluidized gas distributing box 67 is the bowl-type hardwares with several mesh (not shown).This fluidized gas distributing box 67 impels fluidized gas 74 this pressed powder 48 of fluidisation equably, improves the transportation performance of solids and gas mixture 50 with this.
In one embodiment, these pipelines also comprise at least one additional feed channel 76 that links to each other with mixture conduit 44.Should replenish feed channel 76 and introduce additional gas in the course of conveying of downstream, to regulate flowing of pressed powder.
Air-flow 52, carrier gas 46, fluidized gas 74 and additional gas 78 can be from same sources of the gas, also can be from different sources of the gas.In one embodiment, air-flow 52, carrier gas 46, fluidized gas 74 and additional gas 78 are a kind of in unreactable gas, nitrogen or other suitable gas, perhaps any two kinds or more of combination in any.
Fig. 5 has illustrated other another embodiment dry feed systems 80 of the present invention.Dry feed system 80 comprises head tank 82 and several pipelines.These pipelines comprise the carrier gas channel 83, conveying solid substance powder 88 of delivery of carrier gas 84 in case mix the solid pipeline 86 that forms solids and gas mixtures 90, transportation flow gasification 94 with carrier gas 84 so as the fluidized gas pipeline 92 of fluidisation solids and gas mixture 90, with solids and gas mixture 90 from the mixture conduit 96 of head tank 82 outputs and 96 that link to each other with mixture conduit, in order to inject the additional feed channel 98 that can regulate the mobile additional gas 100 of pressed powder to solids and gas mixture 90.
The multiple modes such as welding, flange connection that can adopt fluidized gas distributing box 106 are fixed in the bottom of head tank 82, also can be supported and fixed on the bottom of head tank 82 by metallic framework.In the mode that adopts metallic framework to support, at first metallic framework is supported the bottom of being fixed in batch can 82 with modes such as welding, then fluidized gas distributing box 106 is fixed in this metallic framework with welding or other modes and supports.The use metallic framework supports, and can improve the load bearing stength of fluidized gas distributing box 106, and then the operating cycles that can prolong fluidized gas distributing box 106.In one embodiment, fluidized gas distributing box 106 is funnel-form hardwares.This funnel-form hardware is provided with several and is used for mesh (not shown) by fluidized gas.In another embodiment, dry feed system 80 is provided with several fluidized gas pipelines 92 that is circle distribution, to introduce multiple flow gasification 94 to fluidized gas distributing box 106.
In the dry feed system 80 of an embodiment, gas distributor 104 is introduced air-flow 103 and has been stoped pressed powder 88 to be collected near tank body 102 inwalls, air-flow 103 also improves the flow velocity of pressed powder 88, improve the distribution of pressed powder in head tank, also avoided occurring rat hole and arch formation.Further, fluidized gas distributing box 106 comes fluidisation solids and gas mixture 90 by introducing fluidized gas 94, stops up or bridge formation thereby avoided pressed powder to form in the bottom of head tank 82, makes that like this solid volume of output head tank 82 is stable.Replenish feed channel 98 and in the course of conveying of downstream, introduce additional gas 100, further adjusted flowing of pressed powder 88.Air-flow 103, fluidized gas 94 and additional gas 100 have stoped the simultaneous situation of multiple transmission failure in conjunction with using, and have guaranteed the stationary flow of pressed powder different phase in course of conveying, and then have improved the performance of downstream process step.
Though describe the present invention in conjunction with the specific embodiments, those skilled in the art can make many modifications and modification to the present invention.For example, head tank that the present invention relates to and dry feed system also can be applied to carry the pressed powder of other types such as cement flour, carbon black except can being applied to the conveying granular solid fuel.Therefore, recognize that claims intention covers all such modifications and the modification in the true spirit scope of the present invention.
Claims (13)
1. head tank comprises:
Tank body;
Several are installed in the import on the tank body, and described import is introduced pressed powder and carrier gas tank body and mix the formation solids and gas mixture in tank body;
Gas distributor, described gas distributor and tank body fluid communication are to import air-flow in the tank body, and described air-flow is radial center shaft towards tank body and blows described solids and gas mixture; And
With the tank body fluid communication and be positioned at fluidized gas distributing box below the gas distributor.
2. head tank as claimed in claim 1, wherein said air-flow are pulse gas.
3. head tank as claimed in claim 1 or 2, wherein said gas distributor comprises that several are distributed in the injection portion at described diverse location place with the delivery section at described gas delivery diverse location place to the tank body and several, and described injection portion and corresponding delivery section fluid communication are to go into described air flow jetting in the described tank body.
4. head tank as claimed in claim 3, wherein said each injection portion is provided with porous member in its exit.
5. head tank as claimed in claim 3, wherein said injection portion comprises the ring pipe that several distribute along described center shaft.
6. head tank as claimed in claim 5, wherein said ring pipe comprise the nozzle that extends and be arranged to tiltedly down spray towards described center shaft described air-flow from its inside diameter surface.
7. head tank as claimed in claim 1, wherein said fluidized gas distributing box is arranged to have the bowl-shape element of several mesh.
8. dry feed system comprises:
Head tank, described head tank comprise tank body and with the gas distributor of described tank body fluid communication;
Several and described head tank bonded assembly pipeline; Described ducting pressed powder and carrier gas enter and form solids and gas mixture in the described tank body, and delivery air enters gas distributor and blows described solids and gas mixture to be radial center shaft towards tank body; And
Fluidized gas distributing box, described fluidized gas distributing box are installed near the head tank solids and gas mixture discharge orifice, the fluidized gas that is used to carry the described solids and gas mixture of fluidisation.
9. dry feed as claimed in claim 8 system, wherein said gas distributor is a looped pipeline, the inwall of described looped pipeline is provided with several openings towards described center shaft.
10. dry feed system as claimed in claim 8 or 9, wherein said pipeline comprises that at least one carries the mixture conduit and at least one of described solids and gas mixture to be connected to described mixture conduit and inject to described solids and gas mixture and mend gas filed additional feed channel.
11. dry feed as claimed in claim 10 system, wherein said at least one mixture conduit comprises at least two inlets that are positioned at tank body; Wherein at least one inlet is positioned near the described center shaft, and at least one inlet is positioned near the inwall of tank body.
12. dry feed as claimed in claim 8 system, wherein said gas distributor comprises that several are with the transfer tube at gas delivery diverse location place to the tank body and several and corresponding transfer tube fluid communication and at the jet pipe of described diverse location place jet-stream wind.
13. dry feed as claimed in claim 8 system, wherein said air-flow is a pulse gas.
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| CN 201010217557 CN102295114B (en) | 2010-06-24 | 2010-06-24 | Feed tank and dry method feed system provided with feed tank |
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| CN 201010217557 CN102295114B (en) | 2010-06-24 | 2010-06-24 | Feed tank and dry method feed system provided with feed tank |
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| CN102295114A CN102295114A (en) | 2011-12-28 |
| CN102295114B true CN102295114B (en) | 2013-07-31 |
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| CN111115034A (en) * | 2020-01-14 | 2020-05-08 | 煤科院节能技术有限公司 | Anti-blocking powder bin fluidizing device |
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| US6036407A (en) * | 1997-09-03 | 2000-03-14 | Exxon Chemical Patents Inc. | Solids conveying system for compacted, friable solids that can not be pushed or compressed |
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Effective date of registration: 20200106 Address after: Pennsylvania, USA Patentee after: Gas Products and Chemical Company Address before: New York State, USA Patentee before: General Electric Company |