CN105950198A - Powder coal pyrolysis dedusting system with built-in circulating granular bed - Google Patents
Powder coal pyrolysis dedusting system with built-in circulating granular bed Download PDFInfo
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- CN105950198A CN105950198A CN201610453598.9A CN201610453598A CN105950198A CN 105950198 A CN105950198 A CN 105950198A CN 201610453598 A CN201610453598 A CN 201610453598A CN 105950198 A CN105950198 A CN 105950198A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/18—Modifying the properties of the distillation gases in the oven
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Abstract
The invention belongs to the field of coal graded gradient utilization, and mainly relates to a dedusting system in a powder coal pyrolysis process. In order to overcome the defects in the prior art, the invention designs and develops a powder coal pyrolysis dedusting system with a built-in circulating granular bed. By combining the characteristics of the reactor, the built-in circulating granular bed is utilized to perform dedusting treatment on pyrolysis gas; and by using the granular bed material as a filter material, the used filter material can be recycled, thereby efficiently solving the problem of dedusting of powder coal pyrolysis gas at low cost.
Description
Technical field
The invention belongs to coal sub-prime cascade utilization field, relates generally to the dust pelletizing system during a kind of pulverized coal pyrolysis.
Background technology
Low-order coal sub-prime cascade utilization is the key areas of China 13 Coal Chemical Industry, especially for China's substantial amounts of low order fine coal, the most effectively utilizes the emphasis becoming research.Taking pyrolytic technique that low-order coal oil gas is taken out, remaining semicoke goes generating or again as gasified raw material, contrasts with Coal Gasification Technology, invests little, and water consumption is low, is the Technology Ways that efficiently utilizes of the Coal Clean that China advocates.But during pulverized coal pyrolysis, pyrolysis gas carries substantial amounts of dust granules, the high temperature ON-LINE SEPARATION being pyrolyzed coke breeze and pyrolysis oil gas during pulverized coal pyrolysis is one of main difficult technical of running into of this technique.Fine coal in, in Low Temperature Pyrolysis Process produce the phase transformation high, easy of dust-laden pyrolysis gas temperature.Pyrolysis coke breeze and pyrolysis oil-gas high-temperature ON-LINE SEPARATION effect are undesirable, ultimately result in the solid content in coal tar higher, and oil quality is poor, it is impossible to meet the quality index of the further deep processing of coal tar.At present, the pyrolytic technique of fine coal mainly has granule dedusting filter and pyrolysis gas dust arrester etc..But, the shortcomings such as the pulverized coal pyrolysis coke breeze and the pyrolysis oil-gas component that obtain through pyrolytic technique are extremely complex, solid content in coal tar is higher, oil quality is poor make it be difficult to directly utilize and store, it is difficult to industrial applications.During pulverized coal pyrolysis, the dedusting technology of dust-laden pyrolysis gas and the developmental research of key equipment, have become as one of low temperature pyrogenation field problem the most leaved for development in coal.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, design and develop the pulverized coal pyrolysis dust pelletizing system of a kind of built-in circular granular bed, the feature of binding reactor of the present invention itself, use built-in circular granular bed that pyrolysis gas is carried out dust removal process, and utilize particulate bed material as filter material, the filter material used can recycle such that it is able to low cost, a dedusting difficult problem for high efficiency solution pulverized coal pyrolysis gas.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
The invention provides a kind of pulverized coal pyrolysis dust pelletizing system, including: pyrolysis reactor and circular granular bed, the bringing-up section of described circular granular bed and dedusting section are positioned at the side of described pyrolysis reactor, fixing with the sidewall of described pyrolysis reactor be connected, and along the short transverse of described pyrolysis reactor through described pyrolysis reactor inside；Wherein:
Described circular granular bed includes superposed bringing-up section, the dedusting section being positioned at bottom, carries material device, feed system and regenerator, many heat accumulation type radiant tubes of the short transverse multi-tier arrangement along described circular granular bed it are provided with, for heated particle bed inside the bringing-up section of described circular granular bed；The described dedusting section of the front end being arranged on the pyrolysis gas outlet of described pyrolysis reactor is positioned at below the bringing-up section of described circular granular bed, export including loading head, inlet end, outlet side and grain bed, described loading head is obliquely installed the top of the dedusting section in described circular granular bed, described inlet end and described outlet side are arranged on the middle part of the dedusting section of described circular granular bed, and the outlet of described grain bed is arranged on the bottom of the dedusting section of described circular granular bed；The upper end of described loading head is connected with the sidewall of the bringing-up section of described circular granular bed, the lower end of described loading head is connected with described outlet side, collects in the dedusting section flowing into described circular granular bed for the particulate bed material that the bringing-up section through described circular granular bed is heated；Described inlet end is air inlet grid plate structure, described air inlet grid plate structure includes air inlet grid plate and multiple first deflection plate, one end of described first deflection plate is connected with described air inlet grid plate, the other end extends as free end along direction, lower right, interval between the free end of adjacent described first deflection plate forms the opening of described air inlet grid plate so that the baffling that the opening part at described air inlet grid plate is formed flows toward direction, lower right；Described outlet side is grid plate structure of giving vent to anger, described grid plate structure of giving vent to anger includes give vent to anger screen and multiple second deflection plate, one end of described second deflection plate is connected with described screen of giving vent to anger, the other end extends as free end along direction, lower left, the opening being spaced described in formation screen of giving vent to anger between the free end of adjacent described second deflection plate so that the baffling that the opening part at described screen of giving vent to anger is formed flows toward direction, upper right side.
According to embodiments of the invention, described in carry material device be connected with described granule discharging opening；Described regenerator is connected with the described material device that carries, for the semicoke removed in described circular granular bed and stick to the coking material in described particulate bed material, described regenerator can be passed through high-temp combustion semicoke after air or steam, utilize that semicoke is different from the density of described particulate bed material to be separated so that described particulate bed material regenerates；Described feed system particulate charge mouth with described regenerator and described circular granular bed top respectively is connected, in the bringing-up section that the particulate bed material regenerated through described regenerator joins described circular granular bed.
According to embodiments of the invention, described first deflection plate is 15-60 degree with the angle of vertical curve；Described second deflection plate is 15-60 degree with the angle of vertical curve.
According to embodiments of the invention, the dedusting section of described circular granular bed is plate armature, and described loading head is collection flitch.
According to embodiments of the invention, pyrolysis gas is 0.05-0.5m/s through the flow velocity of described air inlet grid plate structure and described grid plate structure of giving vent to anger, and the spacing of described inlet end and described outlet side is 50-300mm.
According to embodiments of the invention, described particulate bed material is evengranular Ceramic Balls or quartz sand.
According to embodiments of the invention, after described particulate bed material enters the bringing-up section of described circular granular bed by described feed system, utilize the mode of moving bed, described particulate bed material is heated, dedusting, regeneration, it is achieved circulation.
According to embodiments of the invention, described pyrolysis reactor includes: charging aperture, pyrolysis gas outlet, discharging opening and heat accumulation type radiant tube, described charging aperture is arranged on the roof of described pyrolysis reactor, described pyrolysis gas outlet is arranged on the sidewall of described pyrolysis chamber, described heat accumulation type radiant tube is along the short transverse multi-tier arrangement of described reactor, and every layer has the many described heat accumulation type radiant tubes arranged in the horizontal direction.
In another aspect of the present invention, the invention provides a kind of method utilizing foregoing pulverized coal pyrolysis dust pelletizing system to carry out pulverized coal pyrolysis dedusting.According to embodiments of the invention, the method comprises the following steps:
A. fine coal is joined in described pyrolysis reactor by charging aperture, in described pyrolysis reactor, complete pyrolytic process；
The particulate bed material that the most described circular granular bed produces, the dedusting section being entered described circular granular bed by described loading head is piled up, and is used for filtering；
C. the pyrolysis gas being pyrolyzed generation enters the dedusting section of described circular granular bed from described inlet end, carries out dust removal process；
D. the pyrolysis gas of removing dust through described outlet side out after, described pyrolysis gas outlet discharge.
nullAccording to embodiments of the invention，The particulate bed material that described circular granular bed in described step b produces，After the dedusting section of described circular granular bed carries out dust removal process to described pyrolysis gas，Discharge through the outlet of described grain bed，Material device is carried described in entering into，Carry material device described in Jing and propose material transport to described regenerator，In described regenerator, described particulate bed material is carried out Regeneration Treatment by removing semicoke and the coking material that sticks in described particulate bed material，Then the regeneration particulate bed material obtained enters the bringing-up section of described circular granular bed via described feed system，Described regeneration particulate bed material is heated to 500-550 DEG C by described heat accumulation type radiant tube，Finally，The dedusting section being entered described circular granular bed by described loading head is piled up，Dust removal process for described pyrolysis gas，Thus，Achieve the recycling of described particulate bed material.
The beneficial effects of the present invention is:
(1) the pulverized coal pyrolysis dust pelletizing system that the present invention provides has resistant to elevated temperatures advantage, it is possible to normally work under the high temperature of 500～600 DEG C；
(2) the pulverized coal pyrolysis dust pelletizing system that the present invention provides has good heat insulation effect and corrosion resistance, condensable gases in pyrolysis gas can be effectively prevented to cause it to be attached on cleaner owing to variations in temperature generates the tar in dust, thus, it is possible to be effectively prevented from that acceleration equipment under the high temperature conditions is aging even makes it ineffective；
(3) the pyrolysis gas time of staying in cleaner unit in the pulverized coal pyrolysis dust pelletizing system that the present invention provides is short, the dust carried secretly in pyrolysis gas can be removed within the shortest time, effectively prevent pyrolysis gas and the side reactions such as second pyrolysis occur in cleaner, it is ensured that tar quality；
(4) feature of the pulverized coal pyrolysis dust pelletizing system binding reactor itself that the present invention provides, use built-in circular granular bed that pyrolysis gas is carried out dust removal process, and utilize particulate bed material as filter material, the filter material used can recycle such that it is able to low cost, a dedusting difficult problem for high efficiency solution pulverized coal pyrolysis gas.
Accompanying drawing explanation
Fig. 1 is the structure chart of pulverized coal pyrolysis dust pelletizing system of the present invention.
Fig. 2 is the structure chart of the dedusting section of circular granular bed of the present invention.
Wherein, 1, charging aperture, 2, pyrolysis reactor, 3, heat accumulation type radiant tube, 4, circular granular bed, 41, loading head, 42, inlet end, 43, outlet side, 44, grain bed outlet, 45, air inlet grid plate, the 46, first deflection plate, 47, screen of giving vent to anger, 48, the second deflection plate, 5, pyrolysis gas outlet, 6, discharging opening, 7, regenerator.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, and the most same or similar label represents same or similar element or has the element of same or like function.The embodiment described below with reference to accompanying drawing is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it will be appreciated that, term " on ", D score, "left", "right", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or hint indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or implicitly include one or more this feature.In describing the invention, except as otherwise noted, " multiple " are meant that two or more.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " being connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or be integrally connected；Can be to be mechanically connected, it is also possible to be a connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood with concrete condition.
According to an aspect of the present invention, the invention provides the pulverized coal pyrolysis dust pelletizing system of a kind of built-in circular granular bed, Fig. 1 is the structure chart of pulverized coal pyrolysis dust pelletizing system of the present invention.As shown in Figure 1, the pulverized coal pyrolysis dust pelletizing system of this built-in circular granular bed includes: pyrolysis reactor 2 and circular granular bed 4, the bringing-up section of described circular granular bed and dedusting section are positioned at the side of described pyrolysis reactor, fixing with the sidewall of described pyrolysis reactor be connected, and along the short transverse of described pyrolysis reactor through described pyrolysis reactor inside；Wherein:
Described circular granular bed includes superposed bringing-up section, the dedusting section being positioned at bottom, carries material device, feed system and regenerator 7, many heat accumulation type radiant tubes 3 of the short transverse multi-tier arrangement along described circular granular bed it are provided with, for heated particle bed inside the bringing-up section of described circular granular bed；The described dedusting section of the front end being arranged on the pyrolysis gas outlet 5 of described pyrolysis reactor is positioned at below the bringing-up section of described circular granular bed, 44 are exported including loading head 41, inlet end 42, outlet side 43 and grain bed, described loading head is obliquely installed the top of the dedusting section in described circular granular bed, described inlet end and described outlet side are arranged on the middle part of the dedusting section of described circular granular bed, and the outlet of described grain bed is arranged on the bottom of the dedusting section of described circular granular bed；The upper end of described loading head is connected with the sidewall of the bringing-up section of described circular granular bed, the lower end of described loading head is connected with described outlet side, collects in the dedusting section flowing into described circular granular bed for the particulate bed material that the bringing-up section through described circular granular bed is heated；Described inlet end is air inlet grid plate structure, described air inlet grid plate structure includes air inlet grid plate 45 and multiple first deflection plate 46, one end of described first deflection plate is connected with described air inlet grid plate, the other end extends as free end along direction, lower right, interval between the free end of adjacent described first deflection plate forms the opening of described air inlet grid plate so that the baffling that the opening part at described air inlet grid plate is formed flows toward direction, lower right；Described outlet side is grid plate structure of giving vent to anger, described grid plate structure of giving vent to anger includes give vent to anger screen 47 and multiple second deflection plate 48, one end of described second deflection plate is connected with described screen of giving vent to anger, the other end extends as free end along direction, lower left, the opening being spaced described in formation screen of giving vent to anger between the free end of adjacent described second deflection plate so that the baffling that the opening part at described screen of giving vent to anger is formed flows toward direction, upper right side.
According to a particular embodiment of the invention, the bringing-up section of this described circular granular bed and the profile of dedusting section and " fixing connected mode " with described pyrolytic reaction implement body thereof are not particularly limited, as long as ensureing that what the bringing-up section of described circular granular bed and dedusting section can be stable is connected in pyrolysis reactor.Preferably, bringing-up section and the dedusting section profile of described circular granular bed can be body structures, and before and after this body structure, sidewall extends along the inner chamber of pyrolysis reactor, and the two ends of described front-rear side walls sidewall weld with pyrolysis reactor respectively is fixed.Thus, native system utilizes the mode of built-in circular granular bed in pyrolysis reactor, and utilizes the particulate bed material that can recycle that circular granular bed produces as filter material, solves the problem that pyrolysis gas dedusting during pulverized coal pyrolysis is difficult.
The inventors discovered that, the pulverized coal pyrolysis dust pelletizing system of a kind of built-in circular granular bed in the present invention, feature by binding reactor itself, use built-in circular granular bed that pyrolysis gas is carried out dust removal process, and utilize particulate bed material as filter material, the filter material used can recycle such that it is able to low cost, a dedusting difficult problem for high efficiency solution pulverized coal pyrolysis gas.
According to embodiments of the invention, described pyrolysis reactor includes: charging aperture 1, pyrolysis gas outlet 5, discharging opening 6 and heat accumulation type radiant tube 3.Described charging aperture is arranged on the roof of described pyrolysis reactor, for being joined in pyrolysis reactor by material.Described discharging opening is arranged on the diapire of described pyrolysis reactor, for being discharged by the semicoke granule that pyrolysis reactor produces.Described pyrolysis gas outlet is arranged on the sidewall of described pyrolysis chamber, and fixes and be connected with bringing-up section and the dedusting section of described circular granular bed, for the pyrolysis gas after circular granular bed dedusting is discharged pyrolysis reactor.Described heat accumulation type radiant tube is along the short transverse multi-tier arrangement of described reactor, and every layer has the many described heat accumulation type radiant tubes arranged in the horizontal direction, is used for heating pyrolysis reactor, can break up the material added from charging aperture so that it is mix homogeneously simultaneously.Raw material enters from the upper feed inlet of pyrolysis reactor, utilizes descending from gravity, is heated by radial canal, pyrolytic reaction occurs, discharges pyrolysis gas and semicoke.The high-temperature hot produced in pyrolytic process is vented one's spleen and is carried short grained semicoke and enter together and carry out dust removal process in circular granular bed, utilize solid particles sediment, stop and motive power, fine grained in semicoke is separated in entrance circular granular bed, and the pyrolysis gas of cleaning ejects from pyrolysis gas outlet.
According to embodiments of the invention, it is applicable to material, the connected mode of described first deflection plate of the pulverized coal pyrolysis dust pelletizing system of this built-in circular granular bed and orientation is set is not particularly limited, as long as pyrolysis gas can be made to enter the dedusting section of circular granular bed.According to some specific embodiments, described first deflection plate can be resistant to elevated temperatures material, it is preferred that for steel plate；One end of described first deflection plate can be in the way of using fixing connection with described air inlet grid plate, it is preferred that for welding；The other end of described first deflection plate the lower right any direction that orientation can be described air inlet grid plate is set, it is preferred that the angle of described first deflection plate and vertical curve is 15-60 degree.Thus, it is possible to ensure pyrolysis reactor produce pyrolysis gas can baffling, along direction, lower right flow into circular granular bed dedusting section.
According to embodiments of the invention, it is applicable to material, the connected mode of described second deflection plate of the pulverized coal pyrolysis dust pelletizing system of this built-in circular granular bed and orientation is set is not particularly limited, as long as the pyrolysis gas after dedusting can be made to discharge the dedusting section of described circular granular bed.According to some specific embodiments, described second deflection plate can be resistant to elevated temperatures material, it is preferred that for steel plate；One end of described second deflection plate can be in the way of using fixing connection with described screen of giving vent to anger, it is preferred that for welding；The other end of described second deflection plate arrange orientation can be described in give vent to anger the lower left any direction of screen, it is preferred that described second deflection plate is 15-60 degree with the angle of vertical curve.Thus, it is possible to ensure in circular granular bed through dedusting pyrolysis gas can baffling, flow out the dedusting section of circular granular bed along direction, upper right side.
According to embodiments of the invention, the concrete shape and the fixing connected mode that are applicable to the dedusting section of the described circular granular bed of the pulverized coal pyrolysis dust pelletizing system of this built-in circular granular bed are not particularly limited, as long as the sidewall within pyrolysis reactor can be fixedly connected on.According to some specific embodiments, the concrete shape of the dedusting section of described circular granular bed can be plate armature or body structure, it is preferred that for plate armature；Dedusting section and the bringing-up section of described circular granular bed can be welded with the fixing connected mode of described pyrolysis reactor.
According to embodiments of the invention, it is adaptable to material and the shape of the described loading head of the pulverized coal pyrolysis dust pelletizing system of this built-in circular granular bed are not particularly limited, if the particulate bed material that the bringing-up section that can collect described circular granular bed produces.According to some specific embodiments, the material of described loading head can be resistant to elevated temperatures material, such as steel plate, iron plate etc.；The shape of described loading head can be tabular or discoid, it is preferred that for collection flitch.Thus, it is possible to ensure that the particulate bed material that the bringing-up section of described circular granular bed produces can preferably be collected in the dedusting section flowing into described circular granular bed.
According to embodiments of the invention, the screen split shed area of the described air inlet grid plate structure and described grid plate structure of giving vent to anger that are applicable to the pulverized coal pyrolysis dust pelletizing system of this built-in circular granular bed is not particularly limited, as long as ensure that pyrolysis gas is through described air inlet grid plate structure and the flow velocity of described grid plate structure of giving vent to anger.According to some specific embodiments, pyrolysis gas can be 0.05-0.5m/s through the flow velocity of described air inlet grid plate structure and described grid plate structure of giving vent to anger.Further, the spacing of described inlet end and described outlet side can be 50-300mm, ensures pyrolysis gas dust removing effects, and the furnace pressure of pyrolysis reactor will not be the highest simultaneously.
According to embodiments of the invention, it is adaptable to the described circular granular bed of the pulverized coal pyrolysis dust pelletizing system of this built-in circular granular bed includes superposed bringing-up section, the dedusting section being positioned at bottom, carries material device, feed system and regenerator.According to some specific embodiments, described in propose material device and described grain bed outlet and be connected, be used for realization and the described particulate bed material of the dedusting section of described circular granular bed be transported in described regenerator；Described regenerator is connected with the described material device that carries, for the semicoke removed in described circular granular bed and stick to the coking material in described particulate bed material, described regenerator can be passed through high-temp combustion semicoke after air or steam, utilize that semicoke is different from the density of described particulate bed material to be separated so that described particulate bed material regenerates；Described feed system particulate charge mouth with described regenerator and described circular granular bed top respectively is connected, in the bringing-up section that the particulate bed material regenerated through described regenerator joins described circular granular bed；The bringing-up section of described circular granular bed is connected with described feed system, roof is provided with particulate charge mouth, take the mode of built-in regenerative radial canal, utilize the particulate bed material of regeneration described in the heat of heat accumulation type radiant tube, wherein, described heat accumulation type radiant tube uses the arrangement from top to bottom of heat accumulation type radiant tube in similar pyrolysis reactor, and utilizes radial canal temperature control method, and the particulate bed material of described regeneration is heated to 500-550 DEG C；The dedusting section of described circular granular bed is connected to below the bringing-up section of described circular granular bed, is used for realizing particulate bed material (as filter material) and pyrolysis gas is carried out dust removal process.Thus, described particulate bed material by described feed system enter described circular granular bed bringing-up section after, utilize the mode of moving bed, described particulate bed material is heated, dedusting, regeneration, it is achieved circulation.
According to embodiments of the invention, it is adaptable to shape and the material of the described particulate bed material of the pulverized coal pyrolysis dust pelletizing system of this built-in circular granular bed are not particularly limited, as long as being capable of the recycling of the dust removal process to pyrolysis gas and particulate bed material.According to some specific embodiments, the shape of described particulate bed material can be spherical shape or ellipsoid shape, it is preferred that for evengranular spherical shape；The material of described particulate bed material can be pottery or quartz sand.Thus, described particulate bed material is high temperature resistant, not with pyrolysis gas generation chemical reaction, thus ensure that the recycling of particulate bed material and pyrolysis gas carried out efficient dust removal process.
According to another aspect of the present invention, present invention also offers a kind of method that pulverized coal pyrolysis dust pelletizing system utilizing foregoing built-in circular granular bed carries out pulverized coal pyrolysis dedusting.According to embodiments of the invention, the method comprises the following steps:
A. fine coal is joined in described pyrolysis reactor by charging aperture, in described pyrolysis reactor, complete pyrolytic process.According to embodiments of the invention, described fine coal enters in described pyrolysis reactor by described charging aperture, and after described heat accumulation type radiant tube heats, heated fine coal occurs pyrolytic reaction in pyrolysis reactor, produces pyrolysis gas and semicoke granule.
The particulate bed material that the most described circular granular bed produces, the dedusting section being entered described circular granular bed by described loading head is piled up, and is used for filtering.The particulate bed material that described circular granular bed produces, after the dedusting section of described circular granular bed carries out dust removal process to described pyrolysis gas, discharge through the outlet of described grain bed, material device is carried described in entering into, carry material device described in Jing and propose material transport to described regenerator, in described regenerator, described particulate bed material is carried out Regeneration Treatment by removing semicoke and the coking material that sticks in described particulate bed material, then the regeneration particulate bed material obtained enters the bringing-up section of described circular granular bed via described feed system, described regeneration particulate bed material is heated to 500-550 DEG C by described heat accumulation type radiant tube, finally, the dedusting section being entered described circular granular bed by described loading head is piled up, the dust removal by filtration being re-used for described pyrolysis gas processes, thus, achieve the recycling of described particulate bed material.
C. the pyrolysis gas being pyrolyzed generation enters the dedusting section of described circular granular bed from described inlet end, carries out dust removal process.The dedusting section of described circular granular bed is plate armature, mainly include loading head, inlet end, outlet side and bottom discharging opening, wherein, described inlet end is air inlet grid plate structure, described air inlet grid plate structure includes air inlet grid plate and multiple first deflection plate, one end of described first deflection plate is connected with described air inlet grid plate, the other end extends as free end along direction, lower right, described first deflection plate and vertical line angle are 15-60 degree, interval between the free end of adjacent described first deflection plate forms the opening of described air inlet grid plate, the baffling formed at the opening part of described air inlet grid plate is flowed toward direction, lower right；Described outlet side is grid plate structure of giving vent to anger, described grid plate structure of giving vent to anger includes give vent to anger screen and multiple second deflection plate, one end of described second deflection plate is connected with described screen of giving vent to anger, the other end extends as free end along direction, lower left, described second deflection plate is 15-60 degree with the angle of vertical line, the opening being spaced described in formation screen of giving vent to anger between the free end of adjacent described second deflection plate so that the baffling that the opening part at described screen of giving vent to anger is formed flows toward direction, upper right side.Described pyrolysis gas is 0.05-0.5m/s through the flow velocity of described air inlet grid plate structure and described grid plate structure of giving vent to anger, and the spacing of described inlet end and described outlet side is 50-300mm.The dedusting section of described circular granular bed uses the particulate bed material in described circular granular bed as filter material, by loading head, the particulate bed material of the bringing-up section of described circular granular bed is introduced into described dedusting section to pile up, dust-laden pyrolysis gas enters from the inlet end of the dedusting section of described circular granular bed, after being filtered by particulate bed material, obtain dedusting pyrolysis gas.Wherein, described particulate bed material can be Ceramic Balls or quartz sand；Described pyrolysis gas is deflected in the dedusting section of described circular granular bed via the inlet end of the dedusting section of described circular granular bed with the flow velocity of 0.05-0.5m/s, dust removal and filtration process is carried out by described particulate bed material, then discharge via the outlet side of the dedusting section of described circular granular bed with the flow velocity of 0.05-0.5m/s, obtain the pyrolysis gas after dedusting.
D. the pyrolysis gas of removing dust through described outlet side out after, described pyrolysis gas outlet discharge.
The inventors discovered that, the pulverized coal pyrolysis dust pelletizing system of a kind of built-in circular granular bed in the present invention, feature by binding reactor itself, use built-in circular granular bed that pyrolysis gas is carried out dust removal process, and utilize particulate bed material as filter material, the filter material used can recycle such that it is able to low cost, a dedusting difficult problem for high efficiency solution pulverized coal pyrolysis gas.
Embodiment 1
Utilize pyrolytic reaction system that Australia's brown coal are processed, add grain bed dedusting and only take the contrast of cyclone dust extractor to be shown in Table 1.
Table 1: Australia's brown coal pyrolysis processing dedusting contrast
| Sequence number | Pyrolysis gas dedusting method | Dustiness after dedusting |
| 1 | Cyclone dust removal | 125mg/Nm3 |
| 2 | Ceramic particle bed dedusting | 39mg/Nm3 |
| 3 | Quartz sand particle bed dedusting | 36mg/Nm3 |
Embodiment 2
Utilize pyrolytic reaction system that Indonesia's brown coal are processed, add grain bed dedusting and only take the contrast of cyclone dust extractor to be shown in Table 2.
Table 2: Indonesia's brown coal pyrolysis processing dedusting contrast
| Sequence number | Pyrolysis gas dedusting method | Dustiness after dedusting |
| 1 | Cyclone dust removal | 132mg/Nm3 |
| 2 | Ceramic particle bed dedusting | 35mg/Nm3 |
| 3 | Quartz sand particle bed dedusting | 34mg/Nm3 |
The pulverized coal pyrolysis dust pelletizing system of built-in grain bed that the present invention provides have high temperature resistant, heat insulation effect good and the advantage of corrosion resistance, normally can work under the high temperature of 500～600 DEG C, and in prevention pyrolysis gas, condensable gases causes it to be attached on cleaner owing to variations in temperature generates the tar in dust effectively, thus, it is possible to be effectively prevented from that acceleration equipment under the high temperature conditions is aging even makes it ineffective.And, pyrolysis gas time of staying in grain bed in the pulverized coal pyrolysis dust pelletizing system of the built-in grain bed that the present invention provides is short, the dust carried secretly in pyrolysis gas can be removed within the shortest time, effectively prevent pyrolysis gas and the side reactions such as second pyrolysis occur in cleaner, it is ensured that tar quality；And, by the feature of binding reactor itself, use built-in circular granular bed that pyrolysis gas carries out dust removal process, and utilize particulate bed material as filter material, the filter material used can recycle such that it is able to low cost, a dedusting difficult problem for high efficiency solution pulverized coal pyrolysis gas.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means that the specific features, structure, material or the feature that combine this embodiment or example description are contained at least one embodiment or the example of the present invention.In this manual, the schematic representation to above-mentioned term is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or feature can combine in any one or more embodiments or example in an appropriate manner.Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: these embodiments can carry out in the case of without departing from the principle of the present invention and objective multiple change, revise, replace and modification, the scope of the present invention is limited by claim and equivalent thereof.
Claims (10)
1. a pulverized coal pyrolysis dust pelletizing system, it is characterized in that, including: pyrolysis reactor and circular granular bed, the bringing-up section of described circular granular bed and dedusting section are positioned at the side of described pyrolysis reactor, fixing with the sidewall of described pyrolysis reactor be connected, and along the short transverse of described pyrolysis reactor through described pyrolysis reactor inside；Wherein:
Described circular granular bed includes superposed bringing-up section, the dedusting section being positioned at bottom, carries material device, feed system and regenerator, many heat accumulation type radiant tubes of the short transverse multi-tier arrangement along described circular granular bed it are provided with, for heated particle bed inside the bringing-up section of described circular granular bed；The described dedusting section of the front end being arranged on the pyrolysis gas outlet of described pyrolysis reactor is positioned at below the bringing-up section of described circular granular bed, export including loading head, inlet end, outlet side and grain bed, described loading head is obliquely installed the top of the dedusting section in described circular granular bed, described inlet end and described outlet side are arranged on the middle part of the dedusting section of described circular granular bed, and the outlet of described grain bed is arranged on the bottom of the dedusting section of described circular granular bed；The upper end of described loading head is connected with the sidewall of the bringing-up section of described circular granular bed, the lower end of described loading head is connected with described outlet side, collects in the dedusting section flowing into described circular granular bed for the particulate bed material that the bringing-up section through described circular granular bed is heated；Described inlet end is air inlet grid plate structure, described air inlet grid plate structure includes air inlet grid plate and multiple first deflection plate, one end of described first deflection plate is connected with described air inlet grid plate, the other end extends as free end along direction, lower right, interval between the free end of adjacent described first deflection plate forms the opening of described air inlet grid plate so that the baffling that the opening part at described air inlet grid plate is formed flows toward direction, lower right；Described outlet side is grid plate structure of giving vent to anger, described grid plate structure of giving vent to anger includes give vent to anger screen and multiple second deflection plate, one end of described second deflection plate is connected with described screen of giving vent to anger, the other end extends as free end along direction, lower left, the opening being spaced described in formation screen of giving vent to anger between the free end of adjacent described second deflection plate so that the baffling that the opening part at described screen of giving vent to anger is formed flows toward direction, upper right side.
2. as described in claim 1 pulverized coal pyrolysis dust pelletizing system, it is characterised in that described in carry material device and export with described grain bed and be connected；Described regenerator is connected with the described material device that carries, for the semicoke removed in described circular granular bed and stick to the coking material in described particulate bed material, described regenerator can be passed through high-temp combustion semicoke after air or steam, utilize that semicoke is different from the density of described particulate bed material to be separated so that described particulate bed material regenerates；Described feed system particulate charge mouth with described regenerator and described circular granular bed top respectively is connected, in the bringing-up section that the particulate bed material regenerated through described regenerator joins described circular granular bed.
3. pulverized coal pyrolysis dust pelletizing system as claimed in claim 1, it is characterised in that described first deflection plate is 15-60 degree with the angle of vertical curve；Described second deflection plate is 15-60 degree with the angle of vertical curve.
4. pulverized coal pyrolysis dust pelletizing system as claimed in claim 1, it is characterised in that the dedusting section of described circular granular bed is plate armature, described loading head is collection flitch.
5. the pulverized coal pyrolysis dust pelletizing system as according to any one of claim 1-4, it is characterised in that pyrolysis gas is 0.05-0.5m/s through the flow velocity of described air inlet grid plate structure and described grid plate structure of giving vent to anger, and the spacing of described inlet end and described outlet side is 50-300mm.
6. the pulverized coal pyrolysis dust pelletizing system as according to any one of claim 1-4, it is characterised in that described particulate bed material is evengranular Ceramic Balls or quartz sand.
7. pulverized coal pyrolysis dust pelletizing system as claimed in claim 2, it is characterized in that, after described particulate bed material enters the bringing-up section of described circular granular bed by described feed system, utilize the mode of moving bed, described particulate bed material is heated, dedusting, regeneration, it is achieved circulation.
8. the pulverized coal pyrolysis dust pelletizing system as according to any one of claim 1-4, it is characterized in that, described pyrolysis reactor includes: charging aperture, pyrolysis gas outlet, discharging opening and heat accumulation type radiant tube, described charging aperture is arranged on the roof of described pyrolysis reactor, described pyrolysis gas outlet is arranged on the sidewall of described pyrolysis chamber, described heat accumulation type radiant tube is along the short transverse multi-tier arrangement of described reactor, and every layer has the many described heat accumulation type radiant tubes arranged in the horizontal direction.
9. the method that the pulverized coal pyrolysis dust pelletizing system that a kind utilizes according to any one of claim 1-8 carries out pulverized coal pyrolysis dedusting, it is characterised in that comprise the following steps:
A. fine coal is joined in described pyrolysis reactor by charging aperture, in described pyrolysis reactor, complete pyrolytic process；
The particulate bed material that the most described circular granular bed produces, the dedusting section being entered described circular granular bed by described loading head is piled up, and is used for filtering；
C. the pyrolysis gas being pyrolyzed generation enters the dedusting section of described circular granular bed from described inlet end, carries out dust removal process；
D. the pyrolysis gas of removing dust through described outlet side out after, described pyrolysis gas outlet discharge.
null10. method as described in claim 9，It is characterized in that，The particulate bed material that described circular granular bed in described step b produces，After the dedusting section of described circular granular bed carries out dust removal process to described pyrolysis gas，Discharge through the outlet of described grain bed，Material device is carried described in entering into，Carry material device described in Jing and propose material transport to described regenerator，In described regenerator, described particulate bed material is carried out Regeneration Treatment by removing semicoke and the coking material that sticks in described particulate bed material，Then the regeneration particulate bed material obtained enters the bringing-up section of described circular granular bed via described feed system，Described regeneration particulate bed material is heated to 500-550 DEG C by described heat accumulation type radiant tube，Finally，The dedusting section being entered described circular granular bed by described loading head is piled up，Dust removal process for described pyrolysis gas，Thus，Achieve the recycling of described particulate bed material.
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| CN105670664A (en) * | 2016-03-29 | 2016-06-15 | 新疆广汇中化能源技术开发有限公司 | Pulverized coal pyrolysis device |
| CN205974376U (en) * | 2016-06-22 | 2017-02-22 | 北京神雾环境能源科技集团股份有限公司 | Fine coal pyrolysis dust pelletizing system of built -in circulating grain bed |
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| CN105567267A (en) * | 2016-02-23 | 2016-05-11 | 北京神雾环境能源科技集团股份有限公司 | System and method for pyrolyzing coal |
| CN105670664A (en) * | 2016-03-29 | 2016-06-15 | 新疆广汇中化能源技术开发有限公司 | Pulverized coal pyrolysis device |
| CN205974376U (en) * | 2016-06-22 | 2017-02-22 | 北京神雾环境能源科技集团股份有限公司 | Fine coal pyrolysis dust pelletizing system of built -in circulating grain bed |
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