CN102453551A - Integration system and integration method for drying and gasifying solid fuel particles - Google Patents
Integration system and integration method for drying and gasifying solid fuel particles Download PDFInfo
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- CN102453551A CN102453551A CN2010105125217A CN201010512521A CN102453551A CN 102453551 A CN102453551 A CN 102453551A CN 2010105125217 A CN2010105125217 A CN 2010105125217A CN 201010512521 A CN201010512521 A CN 201010512521A CN 102453551 A CN102453551 A CN 102453551A
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Abstract
The invention discloses an integration system and an integration method for drying and gasifying solid fuel particles. The integration system comprises a material storage tank, a drier which is communicated with the material storage tank and is utilized for drying solid fuel particles by synthetic gas, a solid-gas separator which is communicated with the drier and is utilized for separating the solid fuel particles and the synthetic gas, a buffer which is communicated with the solid-gas separator and is utilized for blowing at least one gas flow into the solid fuel particles, and a gasification device which is communicated with the buffer and is utilized for preparing synthetic gas by part oxidation of the solid fuel particles.
Description
Technical field
The present invention relates to the system and method for integrated drying and gasification solid fuel particle.
Background technology
In recent years, because the low-rank coal aboundresources, for the important effect of generating play more and more.Yet with high-order coal facies ratio, low-rank coal causes generating efficiency low owing to moisture content is high.The common moisture content of low-rank coal is about 20%～30%, even 50% or higher.There are many methods to come the solid fuel particle of drying low-order coal or other high moisture contents now.A kind of method is to prepare in the process at solid fuel particle to carry out predrying to solid fuel particle.A kind of in addition method is to use the sensible heat of the synthetic gas that produces at gasifying stage to come dry these solid fuel particles.Synthetic gas reaches cooling purpose through the heat exchange with solid fuel particle.The drying of solid fuel particle and the cooling step of synthetic gas are combined, can improve generating efficiency.In addition, solid fuel particle also can be increased in effective synthetic gas that gasifying stage produces along with the reduction of moisture content.
In the system of an existing integrated drying and gasification solid fuel particle, use cyclonic separator that synthetic gas that mixes and solid fuel particle are separated.Then, solid fuel particle is delivered directly to and carries out gasification reaction in the gasification installation.The mobile stability of solid fuel particle and controllability all have material impact to the work-ing life and the gasification performance of gasification installation.Yet, because the relatively poor flowability of solid fuel particle causes mass flow rate of solid to be easy to fluctuation.Get into the flow in the solid fuel particle entering gasification installation although some existing systems possibly adopt valve or screw feeder to control, still can't satisfy actual needs.
Summary of the invention
In view of this, the system and method for integrated drying with the gasification solid fuel particle need be provided, it can stably be input to solid fuel particle in the gasification installation.
One embodiment of the present of invention provide the system of a kind of integrated drying with the gasification solid fuel particle.This system comprises storage tank; Moisture eliminator with storage tank fluid communication and employing synthetic gas drying solid fuel pellet; With the moisture eliminator fluid communication and with solid fuel particle and the isolating solid and gas separator of synthetic gas; Be blown into the snubber of one gas stream at least with solid and gas separator fluid communication and to solid fuel particle; And with the snubber fluid communication and can generate the gasification installation of synthetic gas through the partially oxidation solid fuel particle.
Embodiments of the invention also provide the method for a kind of integrated drying with the gasification solid fuel particle.This method comprises solid fuel particle is delivered to moisture eliminator from storage tank; Use synthetic gas at said moisture eliminator inner drying solid fuel particle; In the solid and gas separator, solid fuel particle is separated with synthesizer; Solid fuel particle in snubber after separating is blown into one gas stream at least; And in gasification installation, generate said synthetic gas through the partially oxidation solid fuel particle.
Description of drawings
Describe 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 to Fig. 3 is the structural representation of the integrated drying of the present invention with a plurality of embodiment of the system of gasification solid fuel particle;
Fig. 4 is the schema of the integrated drying of the present invention with an embodiment of the method for gasification solid fuel particle.
Embodiment
The present invention relates to the system and method for integrated drying and gasification solid fuel particle.This solid fuel particle includes but not limited to coal dust and biofuel.In other words, the system and method that is used for the solid fuel particle of the gentle powdered coal of integrated drying, biofuel and other types all is protection scope of the present invention.In one embodiment, the moisture content of this solid fuel particle about 20%～50%.In another embodiment, the moisture content of this solid fuel particle about 40%～50%.
Fig. 1 has illustrated that one embodiment of the present of invention are the system 10 of integrated drying and gasification solid fuel particle 12.This system 10 includes but not limited to storage tank 14, moisture eliminator 16, solid and gas separator 18, snubber 20, gasification installation 22 and many pipelines that connect associated elements.In one embodiment, this system comprises that also one is used for being the equipment of predetermined size range (not shown) with pulverized solid fuel particle is broken, and wherein the size of solid fuel particle can be according to storage tank 14 and moisture eliminator 16 or the adjustment of other associated features.In one embodiment, the mean diameter of solid fuel particle is about 100 microns.
In the embodiment shown in fig. 1, these pipelines comprise the first solid particulate transport pipe 24 that connects storage tank 14 and moisture eliminator 16, be connected solid and gas separator 18 and snubber 20 the second solid particulate transport pipe 26, be connected the mixture transport pipe 28 of snubber 18 and gasification installation 22 and be connected gasification installation 22 and the synthetic gas transport pipe 28 of moisture eliminator 16.
Consult Fig. 1 once more, storage tank 14 receives solid fuel particle 12, and through the first Solid Conveying and Melting pipeline 24 solid fuel particle 12 is delivered to moisture eliminator 16.In one embodiment, this storage tank 14 comprises a plurality of lock hoppers that are connected in series (lock hopper), and wherein nethermost lock hopper is connected on the moisture eliminator 16 through the first solid particulate transport pipe 24.Solid fuel particle has been realized from normal pressure to the conversion that is higher than a non-pressurized predetermined pressure through the successive lock hopper.
Although in various embodiment described herein; The synthetic gas that in gasification installation, generates is all carried back moisture eliminator; But understandable, the present invention be also included within some application scenarios only some synthetic gas be transferred back moisture eliminator and be used for dry these solid fuel particles.
In drying process, synthetic gas 32 blows solid fuel particle 12 and moves to solid and gas separator 18 under the driving of the pressure reduction between gasification installation 22 and the moisture eliminator 16.Be cooled in the time of moisture in the synthetic gas 32 drying solid fuel pellets 12.The drying step of solid fuel particle and the cooling step of synthetic gas 32 are combined, like this, do not need extra independent drying step and the cooling step of being used for, save cost like this, and then improve generating efficiency.
After drying step, the mixture of solid fuel particle 12, steam (not shown) and synthetic gas 32 is transfused in the solid and gas separator 18.In one embodiment, this solid and gas separator 18 is cyclonic separators.Synthetic gas 32 separates with solid fuel particle 12 with steam, is transported in the treatment scheme in downstream the cleaning step in the washing tower (not shown) for example then.Solid fuel particle 12 then is delivered in the snubber 20 through the second solid particulate transport pipe 26.
One gas stream 38 comes flowing of stabilization of solid fuel pellet 12 to this snubber 20 through introducing at least.In one embodiment, this gas stream is rare gas element, synthetic gas, waste gas or its mixture.Embodiment at the rare gas element of this use includes but not limited to nitrogen and carbonic acid gas.Solid fuel particle 12 is blended in gas stream 38 and forms solids and gas mixture 40 in the snubber 20, is released out snubber 20 then.Then, the pressure differential solids and gas mixture 40 between gasification installation 22 and the snubber 20 flows to gasification installation 22.Therefore compared to solid, gas has good mobility, can stably carry at the auxiliary solid fuel particle 12 down of gas stream 38, thereby reduces or the infringement of the gasification installation 22 having avoided causing because of flow fluctuation.
The generation step of synthetic gas 32 in gasification installation 32 becomes gasification step usually.In gasification step, solid fuel particle 12 is introduced into vaporized chemical 42 partially oxidations in the gasification installation 22.Pressure and temperature in gasification installation 22 is the important parameter that influences gasification step.In one embodiment, the temperature of gasification installation 22 is in 1300～1500 degrees centigrade of scopes.It should be noted that the numerical value interval of mentioning in this article comprises end value except that specifying.Then, the synthetic gas 32 of generation is some or all ofly through in the synthetic gas transport pipe 30 input moisture eliminators 16.
In one embodiment; This system 10 also comprises the solid and gas separator 44 that is installed on the synthetic gas transport pipe 30; Be mixed in unreacted solid fuel particle, slag or flying dust in the synthetic gas 32 with removal, to avoid these physical deterioration synthetic gas transport pipes 30.
Fig. 2 has illustrated that another embodiment of the present invention is the system 46 of integrated drying and gasification solid fuel particle 47.This system 46 comprises the pipeline of normal pressure jar 48, solid force (forcing) pump 50, moisture eliminator 52, cyclonic separator 60, pressure pan 56, gasification installation 58 and some connection associated elements.
In the drying step of moisture eliminator 52; Gasification installation 58 is mobile to cyclonic separator 60 with the pressure differential synthetic gas 54 in the moisture eliminator 52; Heat exchange takes place with solid fuel particle 47 in synthetic gas 54 in moisture eliminator 52, form the mixture of solid fuel particle 47, steam (not shown) and synthetic gas 54.
Then, under the effect of pressure reduction, the mixture that solid fuel particle 47, steam and synthetic gas 54 form gets into cyclonic separator 60.This cyclonic separator 60 utilizes cf-that solid fuel particle 47 and synthetic gas 54 and steam are separated.Should be noted in the discussion above that and adopt other solid and gas separators to replace this cyclonic separator 60 also to belong to protection scope of the present invention.The treatment scheme that the mixture of synthetic gas 54 and steam gets into other downstream after coming out from cyclonic separator 60 is for example carried washing tower, perhaps gets into the raw material of chemical plant as the manufacturing chemistry article.47 of solid fuel particles pass through Solid Conveying and Melting pipeline 66 input pressure pans 56.
Pressure reduction between pressure pan 56 and the moisture eliminator 52 is the major impetus that solid fuel particle 47 flows to pressure pan 56.If this pressure reduction is smaller, even in some cases, for example the pressure of moisture eliminator 52 is less than pressure pan 56, and solid fuel particle possibly can't normally be input to pressure pan 56.Therefore, in certain embodiments, between cyclonic separator 60 and pressure pan 47, solid force (forcing) pump 63 is installed, this solid force (forcing) pump 63 can be input to hyperbaric environment from low pressure environment with solid fuel particle 47.
Consult shown in Figure 2ly, this pressure pan 56 introduces at least that one pressurising gas 68 is pressurized to preset value, for example a 3Mpa with this pressure pan 56.This solid fuel particle is suspended in this pressure pan 56, and in the following steady flow of assisting of this pressurising gas 68.
In one embodiment, at least one plume gasification 70 is imported into the bottom of pressure pan 56.In this embodiment, solid fuel particle 47, pressurising gas 68 and fluidized gas 70 are mixed formation solids and gas mixture 72.This solids and gas mixture 72 is input in the gasification installation 58 through the mixture conduit 74 that connects gasification installation 58 and pressure pan 56 then.In one embodiment, one additional gas 76 is input in the mixture conduit 74 at least, adjusts flowing of solid fuel particle through the gas volume that changes in it.In pressurising gas 68, fluidized gas 70 and additional gas 76 one or several combine auxiliary, make that flowing of solid fuel particle 47 stablized, may command, thereby have protected gasification installation and improved gasification performance.
In gasification installation 58, partial oxidation reaction takes place with vaporized chemical 78 and generates synthetic gas 54 in solid fuel particle 47.This vaporized chemical 78 can be an oxygen, oxygenant that also can other types.The pressure and temperature of gasification is confirmed by system.In one embodiment, the synthetic gas 54 that comes out from gasification installation 58 is in 200～1000 degrees centigrade of scopes.Synthetic gas 54 is through connecting synthetic gas transport pipe 80 some or all of being input in the moisture eliminator 52 of gasification installation 52 and moisture eliminator 52.
The synthetic gas 54 that gasification installation 58 comes out possibly be higher than solid fuel particle 47 pyrolysis temperatures in the moisture eliminator 52; Therefore in certain embodiments, this system 46 comprises that also a water cooler 81 that connects gasification installation 58 cooled off synthetic gas 54 before getting into moisture eliminator 52.In process of cooling, the lime-ash and the unreacted solid fuel particle that are mixed in the synthetic gas 54 form thick slag 82 under the refrigerative effect.In the embodiment shown in Figure 2, water cooler 81 is independent element, devices with gasification installation 58.It is understandable that this water cooler 81 can be integrated in the element with gasification installation 58.
In one embodiment, system 46 further comprises the solid and gas separator 84 that is installed on the synthetic gas transport pipe 80, gets between the moisture eliminator at synthetic gas 54, and flying dust or other fine particles that this solid and gas separator 84 will be mixed in the synthetic gas are removed.It is understandable that this solid and gas separator 84 is not limited to spatially between water cooler 81 and moisture eliminator 84.Arranging of other types; So long as arranging, this can make synthetic gas 54 from gasification installation 58 or water cooler 81 processing; Be introduced into solid and gas separator 84, and then get into moisture eliminator 52, all belong to the protection domain of " solid and gas separator 84 is between water cooler 81 and moisture eliminator 52 ".
Flying dust is discharged with the form of fine slag at solid and gas separator 84.In certain embodiments, solid and gas separator 84 is porcelain filter or metallic filter, and the device with porcelain filter or metallic filter similar characteristics also can be applied in this.
In some applications, at least one gas pressurization device 88 is installed on the synthetic gas transport pipe 80 to provide enough power to impel synthetic gas 54 to move to moisture eliminator 52.
Fig. 3 has illustrated that other another embodiment of the present invention is the system 90 of integrated drying and gasification solid fuel particle.This system 90 has similar structure with system 46 shown in Figure 2, and difference is that this system 90 further comprises the screw feeder (screwfeeder) 92 between cyclonic separator 60 and pressure pan 56.This screw feeder 92 can be controlled the flow of the solid fuel particle that gets into pressure pan 56.System 90 has avoided the fluctuation of mass flow rate of solid effectively through the flow of control solid fuel particle and in that one gas stream is down auxiliary at least, has guaranteed that solid fuel particle can be stablized, controllably conveying.
Fig. 4 has illustrated that other another embodiment of the present invention is the method 94 of integrated drying and gasification solid fuel particle.This method 94 comprises the steps.In step 96, solid fuel particle is imported in the moisture eliminator from a storage tank.This storage tank one embodiment comprises a normal pressure jar.This normal pressure jar provides solid fuel particle to the system of an integrated drying with the gasification solid fuel particle serially.An embodiment setting of this moisture eliminator is operated in the pressure that is not less than 2Mpa, can hold more synthetic gas like this and come the drying solid fuel pellet.In one embodiment, step 96 realizes through a solid force (forcing) pump.This solid force (forcing) pump can directly be transported to solid fuel particle under the hyperbaric environment from low pressure environment.
In step 98, be employed in the synthetic gas drying solid fuel pellet in a moisture eliminator that generates in the gasification step.This synthetic gas is the hot gas that in gasification step, generates through the partially oxidation solid fuel particle.Through the heat exchange of synthetic gas and solid fuel particle, the contained water transform of solid fuel particle is a steam.
The temperature of the synthetic gas that comes out from gasification installation changes along with the change of condition, related process and the parameter of gasification installation.Under some conditions, the temperature of synthetic gas is higher than the pyrolysis temperature of solid fuel particle.Pyrolytic reaction can produce tar, has influence on the performance of subelement, like the separating effect of cyclonic separator and the gasification performance in the gasification installation, the for example composition of product gas and stability.Therefore, in an embodiment of this method 94, further comprise the step of cooling syngas, to avoid in the drying step of solid fuel particle, pyrolysis taking place.
In step 100, solid fuel particle mixes to be delivered in the solid and gas separator with steam, synthetic gas and separates.In one embodiment, solid separator is a cyclonic separator.Then, the synthetic gas that is cooled that comes out from step 100 is sent to other application scenarios with steam, and dried solid fuel particle then is transported in the snubber.
In step 102, one gas stream comes flowing of stabilization of solid fuel pellet through in snubber, importing at least.Assisting down of gas stream, solid fuel particle stably flows in snubber.In one embodiment, the snubber setting is less than the pressure of about 3Mpa.In another embodiment, introduce at least one pressurising air-flow and introduce at least one fluidisation air-flow to the top of snubber to the bottom of snubber.This pressurising air-flow is mainly used in the pressure in the snubber is added to preset value.The solid fuel particle of fluidized gas fluidisation bottom is with the flow state in adjustment solid fuel particle exit.
In step 104, with solid fuel particle and pressurising gas or/and fluidized gas be input in the gasification installation.In step 106, under preset temperature and pressure, the partially oxidation solid fuel particle generates synthetic gas.In an embodiment of this method, also comprise filter synthetic gas with will be mixed in the synthetic gas unreacted solid fuel particle or/and synthetic gas remove.The vaporized chemical that this partially oxidation uses is oxygen in one embodiment.
In the course of conveying of solid fuel particle, one or multiply gas stream are used for flowing of stabilization of solid fuel pellet, guaranteed that solid fuel particle is stable, have controllably carried, and not only effectively protect gasification installation, have also improved gasification performance.
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, in system shown in Figure 2, pressure pan 56 also can be arranged on gasification installation above, like this according to field requirement, the length of mixture conduit 74 can be corresponding shorter.Therefore, recognize that claims intention covers all such modifications and modification in the true spirit scope of the present invention.
Claims (15)
1. the system of integrated drying and gasification solid fuel particle comprises:
Storage tank;
Moisture eliminator with storage tank fluid communication and employing synthetic gas drying solid fuel pellet;
With the moisture eliminator fluid communication and with solid fuel particle and the isolating solid and gas separator of synthetic gas;
Be blown into the snubber of one gas stream at least with solid and gas separator fluid communication and to solid fuel particle; And
With the snubber fluid communication and can generate the gasification installation of synthetic gas through the partially oxidation solid fuel particle.
2. the system of integrated drying as claimed in claim 1 and gasification solid fuel particle comprises further solid fuel particle is inputed to the solid force (forcing) pump of said moisture eliminator from said storage tank that the pressure of wherein said moisture eliminator is higher than the pressure of said storage tank.
3. the system of integrated drying as claimed in claim 1 and gasification solid fuel particle, wherein said snubber is between solid and gas separator and gasification installation.
4. the system of integrated drying as claimed in claim 3 and gasification solid fuel particle, wherein said one gas stream at least comprises one pressurising gas at least introduced from the snubber top and at least one plume gasification of introducing from the snubber bottom.
5. like the system of claim 1 or 3 described integrated dryings and gasification solid fuel particle, wherein said snubber is provided with the pressure that is not less than 3 megapascal (MPa)s.
6. the system of integrated drying as claimed in claim 3 and gasification solid fuel particle further comprises being connected to snubber and being used to control the screw feeder that flows into the solid fuel particle flow in the snubber.
7. the system of integrated drying as claimed in claim 1 and gasification solid fuel particle comprises further solid fuel particle is delivered to the solid force (forcing) pump of snubber from the solid and gas separator that the pressure in the wherein said snubber is higher than the pressure in the solid and gas separator.
8. the system of integrated drying as claimed in claim 1 and gasification solid fuel particle; Comprise further between gasification installation and moisture eliminator and can synthetic gas be cooled to the water cooler of preset value that wherein said preset value is lower than the pyrolysis temperature that is positioned at the moisture eliminator solid fuel particle.
9. the system of integrated drying as claimed in claim 1 and gasification solid fuel particle further comprises between gasification installation and moisture eliminator and can remove the solid and gas separator of the flying dust that is mixed in the synthetic gas.
10. the system of integrated drying as claimed in claim 1 and gasification solid fuel particle further comprises between gasification installation and moisture eliminator and can provide power to order about synthetic gas towards moisture eliminator mobile gas pressurization device.
11. the method for an integrated drying and the solid fuel particle that gasifies comprises:
Solid fuel particle is delivered to moisture eliminator from storage tank;
Use synthetic gas at said moisture eliminator inner drying solid fuel particle;
In the solid and gas separator, solid fuel particle is separated with synthesizer;
Solid fuel particle in snubber after separating is blown into one gas stream at least; And
In gasification installation, generate said synthetic gas through the partially oxidation solid fuel particle.
12. the method for integrated drying as claimed in claim 11 and gasification solid fuel particle is wherein passed through the realization of solid force (forcing) pump with solid fuel particle from the step that storage tank is delivered to moisture eliminator.
13. the method for integrated drying as claimed in claim 11 and gasification solid fuel particle, wherein the solid fuel particle after separating is blown at least that the step of one gas stream comprises in snubber:
Through screw feeder solid fuel particle is input in the snubber; And
Import one pressurising gas and at least one plume gasification at least to said snubber.
14. the method for integrated drying as claimed in claim 11 and gasification solid fuel particle further comprises through the solid force (forcing) pump solid fuel particle is delivered to said snubber from the solid and gas separator.
15., further comprise the pyrolysis temperature that the synthetic gas from said gasification installation output is cooled to be lower than the solid fuel particle in the moisture eliminator like the method for the arbitrary described integrated drying of claim 11 to 14 with the gasification solid fuel particle.
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| CN2010105125217A CN102453551A (en) | 2010-10-14 | 2010-10-14 | Integration system and integration method for drying and gasifying solid fuel particles |
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| CN2010105125217A CN102453551A (en) | 2010-10-14 | 2010-10-14 | Integration system and integration method for drying and gasifying solid fuel particles |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105121607A (en) * | 2012-12-20 | 2015-12-02 | Sk新技术株式会社 | Integrated drying and gasification process for simultaneously producing synthetic gas and high rank coal |
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Application publication date: 20120516 |