CN102952586B - The gasification of carbonaceous material - Google Patents
The gasification of carbonaceous material Download PDFInfo
- Publication number
- CN102952586B CN102952586B CN201210303038.7A CN201210303038A CN102952586B CN 102952586 B CN102952586 B CN 102952586B CN 201210303038 A CN201210303038 A CN 201210303038A CN 102952586 B CN102952586 B CN 102952586B
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- China
- Prior art keywords
- rotatable
- grid
- gasifier
- supporting structure
- grid members
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H17/00—Details of grates
- F23H17/08—Bearers; Frames; Spacers; Supports
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/02—Fixed-bed gasification of lump fuel
- C10J3/20—Apparatus; Plants
- C10J3/34—Grates; Mechanical ash-removing devices
- C10J3/40—Movable grates
- C10J3/42—Rotary grates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H9/00—Revolving-grates; Rocking or shaking grates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H9/00—Revolving-grates; Rocking or shaking grates
- F23H9/02—Revolving cylindrical grates
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2200/00—Details of gasification apparatus
- C10J2200/09—Mechanical details of gasifiers not otherwise provided for, e.g. sealing means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H2700/00—Grates characterised by special features or applications
- F23H2700/005—Rotary grates with vertical axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H2700/00—Grates characterised by special features or applications
- F23H2700/009—Grates specially adapted for incinerators
Abstract
The present invention relates to a kind of gasification of carbonaceous material.The grid component (10) that the invention discloses a kind of gasifier comprising: the rotatable grid members in top (11) and below rotatable supporting structure (12).The rotatable supporting structure in below (12) is fastened on the rotatable grid members in described top (11) by multiple removable fastening piece (15), and multiple removable fastening piece (15) is for preventing the vertical displacement of the rotatable grid members in top and the rotatable supporting structure in below.The rotatable supporting structure in below (12) is configured to drive around the common vertical rotation (21) shared with the rotatable grid members in top rotate.Grid component (10) also comprises at least two keyed torque transmitters (16), at least two keyed torque transmitters relative to common rotation axis angularly spaced apart and with the rotatable engaged by support structure of the rotatable grid members in top and below, with when the rotatable supporting structure in below is driven by moment of torsion rotatable supporting structure rotatable grid members above being passed to from below.
Description
Technical field
The present invention relates to the gasification of carbonaceous material.Especially, the present invention relates to the grid component of the gasifier for gasifying to carbonaceous material and the gasifier related to for gasifying to carbonaceous material.
Background technology
For some gasifiers, such as
fBDB
tMgasifiers etc., need intermittently or continuously loading and unloading particulate material, such as particulate carbonaceous material (such as, coal) and grey etc.Therefore, such as, at boosting type gasifier (such as, fixed bed dry bottom formula gasifier) when, the microgranular carbon raw material of such as coal is loaded onto in the gasification chamber of gasifier to form bed (when for fixed-bed type gasifier), and gasify at high temperature and pressure, after gasification, any residual non-gasification materials is removed via rotatable grid component and ash lock (ash lock) as ash from gasifier.
Grid component has two main mechanical functions.First be extract ash for the bottom from gasification chamber, but also for pulverizing and removing any grey agglomerate (slag) that may be formed in gasification.Grid component is also for being assigned to vaporized chemical (normally the mixture of steam and oxygen) in carbonaceous material bed.
Grid component comprises multiple component, the plurality of component mainly: the rotatable grid members in top of general conical; Below rotatable supporting structure, its upper periphery place in rotatable supporting structure with above rotatable grid members be permanently connected; And ring gear, it connects at the following peripheral place of described rotatable supporting structure.Be provided with bottom fixed support structure, rotating parts is supported on bottom fixed support structure.In use, when driving the ring gear that be connected to drive with transmission case assembly pair with the rotatable supporting structure in below via electric motor, grid component rotates, and wherein transmission case assembly makes the rotating parts of grid component rotate.
In the grid component of prior art, rotatable grid members utilizes the multiple bolt being arranged in respective bolt holes to be fixedly connected with rotatable supporting structure with the single keyed torque transmitter being arranged in corresponding keyway.The object of joint bolt prevents the rotatable grid members in top to be vertically separated with the rotatable supporting structure in below.In use, key is used as the torque transmitter between adjacent members, motivating force is delivered to the rotatable grid members in top by the rotatable supporting structure in below from ring gear.In the grid component of prior art, single key is used as torque transmitter.Whole radial load or shearing force that grid component stands is born under key is designed to nonserviceable.It has been generally acknowledged that in prior art: in use, whole radial load or shearing force will be carried before single key is always positioned at other key, and therefore use multiple key to be considered to be unnecessary.
Have been found that: in use, joint bolt and sometimes key this in grid component rotate freely the malfunction hindered under produce fault.When hard grey agglomerate (slag) exist and when resting in the ash discharge ring-shaped article limited between rotatable grid members and the wall of gasification chamber, may break down state.In this case, rotating freely of the rotatable grid members in top is restricted, and electric motor and ring gear continuation rotate and act in the rotatable supporting structure in below.Understandablely be, in this case, moment of torsion on rotatable grid members increases, and from wheel box transmission, arrive the rotatable supporting structure in below by ring gear and the load arriving the rotatable grid members in top is carried by keyed torque transmitter.Because key is designed to tolerate the radial force be associated with malfunction (in a state in which, rotating freely of the rotatable grid members in top is obstructed), therefore the fault of joint bolt is unexpected fault.In use, in fact joint bolt is subject to the protection of key and is not therefore designed to carry any tangential shearing force be associated with malfunction.
When joint bolt is subject to shearing, the rotatable grid members in top produces with the rotatable supporting structure in below and is separated, and grid component no longer can remove ash from gasifier.This makes gasifier stop work, and apparently, undesirably this situation occurs, because may have a strong impact on the income that production level and gasifier produce like this.Therefore, the design of prior art makes to operate poor efficiency, and to reduce this poor efficiency will be useful.
In order to reduce the functional fault caused by the fault of joint bolt, attempt to use more greatly and/or stronger joint bolt.Not being in appropriate location because of believing firmly key to produce displacement is the major cause causing joint bolt fault, so also attempt to be welded to by key on two transoms (that is, rotatable grid members and rotatable supporting structure).But in practice, it is unsuccessful that two kinds of methods have been proved the functional fault of minimizing grid component as above.
Research display: grid component nonserviceable under fault section be the design defect of this mode with keyed torque transmitter, rotatable grid members is connected with rotatable supporting structure due to joint bolt.Be surprised to find: consider the dynamic mechanically load of nonserviceabling in period grid component, introduce the relative movement between rotatable grid members and rotatable supporting structure, namely, component (normally rotatable supporting structure) continuation rotates, and another component (normally rotatable grid members) in assembly keeps static, the rotation of this another component is subject to the obstruction of the grey agglomerate trapped in ash discharge ring-shaped article.In this case, there occurs the relative rotation around keyed torque transmitter, that is, the rotation of rotatable grid members is subject to the obstruction of the grey agglomerate in ash discharge ring-shaped article, and therefore rotatable grid members carries out pivotable round keyed torque transmitter.
In operation, the rotation axis coincident of rotating parts connected two is vital.Adjacent members causes joint bolt to produce displacement relative to respective bolt holes generation displacement and key relative to keyway around the relative movement of key.This causes the rotation of a rotating member to produce displacement.The displacement of rotation causes the shear-stress on joint bolt to increase gradually, finally causes joint bolt to produce fault.Because joint bolt can not prevent the relative movement of two adjacent members, be separated so the rotating parts of grid component produces, thus cause the function of grid component to produce fault.
Be surprised to find in research process: the fault of joint bolt be not due to vertical plane (namely, the plane substantially parallel with the rotation of grid component) in the undercapacity of joint bolt cause, but cause the misregistration of rotatable grid members and rotatable supporting structure in horizontal plane (that is, substantially vertical with rotation plane) to cause around the relative rotation of keyed torque transmitter due to rotatable grid members.
WO 2006/061738 attempts to overcome following problem: the agglomeration problems being fed to the fine coal raw material in fixed-bed type coal gasifier, this problem causes gasifier operation unstable, and the problem of " focus " that the heterogeneous body coal bed flowing through above-mentioned formation due to preferential air-flow causes.The document discloses the working method for the fixed-bed type gasifier and fixed-bed type gasifier overcoming the problems referred to above.This gasifier has: static coal distribution device, and its gasification chamber being positioned at gasifier is inner; And rotatable grid, it has at least one finger projected upwards of the ash outlet top being positioned at gasification chamber.The document is advocated: static coal distribution device and the combination with the rotatable grid members of outstanding finger can improve the radial and axial distribution of coal in coal fixed bed and grey particulate, thus makes coal fixed bed evenly and improve operation and the stability of gasifier.WO 2006/061738 describes two the optional grid components being applicable to realize described target.Following problem is mentioned without any place: upper misregistration, upper grid members and Under The Grille component between grid members and Under The Grille component is around the relative rotation of keyed torque transmitter or cause grid component functional fault due to the shearing of the joint bolt between upper grid members and Under The Grille component in WO 2006/061738.In fact, the problem involved by WO 2006/061738 is different from problem involved in the present invention completely.
CN 201762288 is Chinese utility model and relates to common stream, air blowing, fixed-bed type biomass gasifier.The biomass gasifier of the prior art described by CN 201762288 has body of heater, grey chamber, grid, strut member and ash exhauster.Grid is the flat structures be flatly installed on below stove.Grid has and extends through multiple holes thereon, to allow that inflammable gas and lime-ash are by multiple hole.CN 201762288 determines the multiple problems relevant to prior art grid, the plurality of problem especially comprises: (i) ash accumulates on grid, thus cause the efficiency of gasifier low, (ii) hole in ash blocking grid, thus stop inflammable gas to leave body of heater by described hole, and then suppression gas yield, (iii) hole in grid causes material to leak, and (iv) is because the hole size of dissimilar grid is different to be suitable for the gasification of dissimilar biomass, therefore existing grid pole is unsuitable for the gasification of all kinds biomass.Therefore optional gasifier is proposed, and shown in Fig. 2 to Figure 13 of CN 201762288.Although component (13) existing in the gasifier proposed in CN 201762288 is called grid, this component is not the rotatable grid on conventional meaning, and is actually the stationary installation be positioned at below body of heater.Grid (13) be designed to support from biomass bed derive the ash that obtains and allow inflammable gas and the lime-ash that produces body of heater through the hole in grid (13), but obvious most of lime-ash is discharged by the ash discharge ring-shaped article between grid (13) and inboard wall of furnace body.Grey stirring mechanism is set, with stir grid (13) collected overhead to ash and ash is pushed in ash discharge ring-shaped article.Therefore, grey stirring mechanism is unique rotatable members completely in any biomass gasifier described in CN 201762288.CN 201762288 further describes following content: the size that advantageously can regulate the hole in grid (13), thus enables biomass gasifier be suitable for all kinds gasifying biomass.CN 201762288 discloses following content: regulate a kind of method of the size in the hole on grid (13) to be to provide a kind of adjustable plate (19), this adjustable plate (19) has the structure with grid (13) basic simlarity, namely, be furnished with through multiple holes for plate-like, install with the grid (13) in body of heater is coaxial and is installed on below grid (13).Adjustable plate (19) can rotate in the scope limited, to make: in first position, adjustable plate (19) makes hole (13a) and hole (19a) overlap relative to grid (13) location, thus limit the multiple passages extending through two components (13) and (19), or second or follow-up location place, adjustable plate (19) can relative to grid (13) slightly rotate make hole (19a) and hole (13a) not overlapping (namely, biased), thus effectively reduce to extend through grid (13) and the hole of adjustable plate (19) or the size of passage.In this way, the effective dimensions in the hole (13a) in the grid (13) of the biomass gasifier of CN 201762288 can be regulated, to make just to gasify to various types of biomass in this gasifier by means of only making adjustable plate (19) slightly rotate relative to grid (13).In order to limit the relative movement of adjustable plate (19) relative to grid (13), CN 201762288 describes the multiple arc drip moldings (29) outstanding from the bottom surface of grid (13), and arc drip molding (29) is inserted into the complementary arc-shaped depression portion (28) of the formation slit on the adjustable plate (19) that is arranged in below grid (13).By the projection (29) on the bottom side of grid (13) is assembled to be arranged at adjustable plate (19) above on complementary recess (28) in, allow the limitedly rotary motion of adjustable plate (19) relative to stationary grizzly (13).Therefore, four arc convex (29) are not be used as keyed torque transfer member.Included projection (29) and recess (28) are only for guiding the scope of the relative rotation between stationary grizzly (13) and rotatable adjustable plate (19|) and the relative rotation between restriction stationary grizzly (13) and rotatable adjustable plate (19|).In any case protruding (29) do not transmit any moment of torsion.
Summary of the invention
According to an aspect of the present invention, provide a kind of grid component of the gasifier for gasifying to the carbonaceous material producing ash, described grid component comprises:
The rotatable grid members in top; And
The rotatable supporting structure in below, it is fastened on the rotatable grid members in described top by multiple removable fastening piece, described multiple removable fastening piece is for preventing the vertical displacement of the rotatable supporting structure of the rotatable grid members in described top and described below, the rotatable supporting structure in described below is constructed to rotate with driving around the common vertical rotation shared with the rotatable grid members in described top
Described grid component also comprises at least two keyed torque transmitters, described at least two keyed torque transmitters relative to described common vertical rotation be angle spaced apart and with the rotatable engaged by support structure of the rotatable grid members in described top and described below, with when the rotatable supporting structure in described below is driven by moment of torsion from the rotatable supporting structure in described below be passed to described above rotatable grid members.
In this manual, term " component " is intended to comprise the assembled component including more than one part, such as comprises the rotatable grid members etc. multiple assembling parts being formed grid members.
Contriver is surprised to find: arrange multiple bond energy and enough alleviate the functional fault that prior art grid component stands.Therefore, the multiple keys included by the present invention are not only intended to be understood the situation as strengthening grid component, but in order to keep the geometry globality of grid component.
Key can be angularly spaced apart.Therefore, such as, when only there is two keys, two keys can about 180 °, interval, and when existence three keys, three keys can about 120 °, interval, and when existence four keys, about 90 °, four key intervals.But, the layout of key due to structure constraint (factor such as position set by other component) and and asymmetric, therefore, the layout of key can be slightly biased, such as, be 170 °, instead of 180 °.Therefore, in this manual, " angularly " is intended to represent that differential seat angle is not more than 30 °, is preferably not more than 10 °, is more preferably not more than 5 °.
Preferably, key is arranged as many groups that two keys are one group, and two keys in a group are positioned at diametrically position around described common vertical rotation.
Key can be arranged to a circle, and can be opened by least one fastener separation between adjacent key, and described fastening piece is for suppressing or prevent the vertical displacement of the rotatable supporting structure of the rotatable grid members in described top and described below.Described fastening piece can be arranged as the form of nuts and bolt.
Typically, key is not used in suppresses or prevent the vertical displacement of the rotatable supporting structure of the rotatable grid members in described top and described below without screw thread.
Preferably, key is not cylindrical.
Key can be formed as from wider operated upper end to narrower operated lower end convergent, or vice versa.
Key can for microscler and can have polygonal profile in end view, such as, square.Should be understood that, end view be along extend key longitudinal axis direction intercept.
The comparable fastening piece of key is firm, has the maximum transverse size less than the smallest lateral dimension of key to make the shank of fastening piece.
Rotatable grid members can have upwards and the outside surface of inside convergent.When observing in vertical cross-section, upwards and inwardly the outside surface of convergent can interlock or become step shape, limits vertical and radially spaced stage.This stage can be covered to protect rotatable grid members to avoid the destruction of caustic material (such as, ash) by shielding slab.
According to a further aspect in the invention, a kind of gasifier for gasifying to carbonaceous material is provided, described gasifier comprises grid component as above, described grid component is arranged on by the gasification chamber that limits of gasification vessel, and the rotatable supporting structure in below of described grid component is connected with drive unit.
Gasifier can be fixed-bed type gasifier, especially fixed bed dry bottom formula gasifier.
Gasifier can be coal, waste material or biomass gasifier, or gasifier is configured to the two or more gasifiers being combined into promoting the circulation of qi in coal, waste material and biomass.But typically, described gasifier is the coal gasifier worked under the high pressure between 5 bar (g) and 100 bar (g) and the high temperature between 400 DEG C and 1600 DEG C
Typically, rotatable grid members is configured to have vertical dimension and radial dimension, and the vertical axis that can export around the ash discharge of gasification chamber rotates, and the following peripheral of rotatable grid members is positioned at the top of rotatable grid members or the below of upper end.
In one embodiment of the invention, in use, the vertical axis that grid members exports around described ash discharge rotates.Carbon raw material such as coal is fed to the top of gasifier in bulk, and vaporized chemical is fed to the bottom of the reaction zone that gasification vessel limit by the gasification agent outlets below the lower rim that is positioned at the external shield plate of rotatable grid members, thus the coal of the slow moving-bed being arranged in gasification chamber is gasified.Ash is extracted out continuously from the bottom of gasification chamber by the ring-type ash discharge path arranged between the wall and rotatable grid members of gasification chamber.Plough is rigidly connected with the rotatable grid members continuing in operation to rotate, and the ash by described ash discharge path wiped off by plough, and after this ash flows into the ash lock be arranged in below gasifier vessel under gravity.Along with grid component rotates, between the shielding slab and the abrasive brick on the wall of gasifier vessel of rotatable grid members, carry out slag pulverizing.
Accompanying drawing explanation
Now with reference to accompanying drawing, by example, the present invention will be described, in the accompanying drawings:
Fig. 1 shows the vertical sectional view according to grid component of the present invention, and grid component is installed on according in fixed bed dry bottom formula coal gasifier of the present invention;
Fig. 2 shows the orthographic plan of the rotatable supporting mechanism in below of the grid component of Fig. 1;
Fig. 3 shows in the grid component representing prior art the orthographic plan of the nonserviceable grid members of lower rotation and the relative rotation of the supporting structure of rotation; And
Fig. 4 shows the orthographic plan represented according to the rotation of grid component of the present invention.
Embodiment
With reference to the Fig. 1 in accompanying drawing, Reference numeral 10 generally refers to according to grid component of the present invention, and this grid component is arranged in the gasification vessel 100 according to fixed bed dry bottom formula coal gasifier of the present invention.Gasification vessel 100 limit gasification chamber 102, and grid component 10 is positioned at gasification chamber 102.Gasification chamber 102 has wall 18.
Grid component 10 comprises the rotatable grid members 11 in top, and above this, rotatable grid members 11 utilizes multiple joint bolt 15 to be fixedly connected with the rotatable supporting structure 12 at least two keyed torque transmitters 16 and below.The rotatable supporting structure 12 in below drives with ring gear 13 and is connected, and this ring gear 13 is connected with electric motor (not shown) by wheel box.In use, electric motor and wheel box rotate for making the rotatable grid members in the top of grid component 10 11, the rotatable supporting structure 12 in below and ring gear 13.
Top rotatable grid members 11, the rotatable supporting structure 12 in below and ring gear 13 are supported by the fixed support structure 14 be positioned at above the gasification ash discharge outlet of vessel 100 or path 20.The radially periphery of the rotatable grid members 11 in top is connected with one or more plough 17.Plough 17 is for scraping ash disposal by ash discharge ring-shaped article 19 from the grey bed in gasification chamber 102, and this ash discharge ring-shaped article 19 is limited between the neighboring of rotatable grid members 11, top and the wall 18 of gasification chamber 102.
In use, grid component 10 rotates around rotation 21, and this rotation 21 is corresponding with the medullary ray of ash discharge path 20, and the medullary ray of ash discharge path 20 is also the medullary ray of grid component 10.Coal is fed to the top of gasifier (not shown) in bulk, and vaporized chemical is fed to the bottom of gasification chamber 102 by the gasification agent outlets 23 below the lower rim that is arranged in shielding slab 22, thus gasifies to the coal of the slow moving-bed being arranged in gasification chamber 102.By the ash discharge ring-shaped article 19 that is arranged between the rotatable grid members 11 of the wall 18 as the gasification chamber 102 of a side and the top as the opposing party and extract ash out by ash discharge path 20 constantly from the bottom of gasification chamber 102.Plough 17 rotates together with the rotatable grid members 11 in top, thus discharges ash by scraping ash disposal via ash discharge ring-shaped article 19.Along with the rotatable grid members 11 in top rotates, carry out slag pulverizing between the shielding slab 22 of rotatable grid members 11 and the wall 18 of gasifier chamber 102 up.
With reference to Fig. 2 of accompanying drawing, show the orthographic plan of the rotatable supporting structure 12 in below of the grid component 10 of Fig. 1.The multiple bolt (not shown) corresponding with multiple bolt hole 32 are used for by rotatable to rotatable for top grid members 11 and below supporting structure 12 regularly but be connected removedly.Bolt is designed to connect the rotatable grid members in adjacent top 11 and the rotatable supporting structure 12 in below vertically, and is not designed to bear radial shear power.Be provided with at least two complete relative keyways 34, in this keyway 34, (not shown) is closely positioned with corresponding key.Key is designed to serve as torque transmitter, and motivating force is sent to the rotatable grid members 11 in top from electric motor and wheel box (not shown) via the rotatable supporting structure of ring gear 13 and below 12 by this torque transmitter.
In use, when grey agglomerate clamp-ons the ash discharge ring-shaped article 19 between the rotatable grid members 11 in top and vessel wall 18 as shown in Figure 1, may break down state.The agglomerate that grid component 10 is designed to clamp-oning in ash discharge ring-shaped article 19 is pulverized.But such situation may occur: namely, agglomerate can not be easily broken and remove via ash discharge ring-shaped article 19 and ash discharge path 20, and the rotation of the rotatable grid members 11 in top is hindered.In this case, ring gear 13 continues to drive and the rotatable supporting structure 12 in below that grid members 11 rotatable with top is fixedly connected with rotates.Revolving force is sent to the rotatable grid members 11 in top by the keyed torque transmitter being arranged in above-mentioned keyway 34.
Research shows: when only using a keyed torque transmitter, when the rotation of rotatable grid members 11 is restricted up, there is the relative rotation around the key in keyway 34, that is, rotate the rotatable grid members 11 in top being subject to the restriction of grey agglomerate to be tending towards around the key pivotable in keyway 34.The rotatable grid members 11 in top and the rotatable supporting structure 12 in below cause joint bolt relative to the displacement relative to keyway 34 of the displacement of the bolt hole 32 of correspondence and key around the relative movement of key.This causes the displacement of the rotation being labeled as A and B in Fig. 3 of accompanying drawing.
In figure 3, sense of rotation is represented by arrow 30.The rotation profile of stationary member (that is, the rotatable grid members 11 in top) is probably shown as Reference numeral 110.Key (not shown) is arranged in keyway 34.The rotation profile of rotating member (that is, the rotatable supporting structure 12 in below) is probably shown as Reference numeral 120.The rotation of profile 110 shows for an A, and the rotation of profile 120 shows for a B.
Contriver finds: in operation, it is essential, rotation A and B of the rotatable supporting structure 12 of the rotatable grid members in top 11 and below overlaps, that is, put A and B overlapping along common rotation axis 21 as shown in Figure 1.Under nonserviceabling, the rotation represented by a B becomes and departs from common rotation axis 21, therefore no longer overlapping with the rotation represented by an A.Because the rotatable supporting structure in below 12 causes a B to produce displacement from rotation center axis 21, so the shearing force causing acting on the joint bolt being arranged in bolt hole 32 increases gradually around the relative rotation of the key in keyway 34.Along with joint bolt causing trouble thus, can be used for the area reduction of the motivating force transmitting ring gear 13, as a result, less joint bolt carrys out bearing load, finally cause whole joint bolt to produce fault.Because joint bolt can not prevent the relative movement of the rotatable supporting structure 12 of the rotatable grid members in top 11 and below connected, the rotatable grid members in top 11 of grid component 10 is formed with the rotatable supporting structure 12 in below and is separated, thus causes the functional fault of grid component 10.
Fig. 4 shows the figure of the rotation profile of the rotatable supporting structure 12 of the rotatable grid members in top according to the present invention 11 and below.The introducing being arranged in the extra symmetrical space key of corresponding keyway 34 prevents any displacement of rotation, and the displacement of rotation is the FAQs of prior art grid component, in the grid component of prior art, single key and keyway 34 are arranged between the rotatable grid members 11 in top and the rotatable supporting structure 12 in below.Therefore, the structure comprising one or more groups key provides: even if under malfunction mentioned above, and the rotation represented by A and B is overlapping, overlaps with axis 21.
Preferably, the basic one group of key (that is, two keys) arranged completely each other can be used relative spacing, more preferably, two groups of keys (that is, four keys) can be used.Each group of key each other basic relative spacing ground is arranged, make key around the periphery of the rotatable supporting structure in below 12 be connected with the rotatable grid members in top 11 substantially vertical and angularly compartment of terrain arrange.Up the rotatable supporting structure 12 of rotatable grid members 11 and below be not when being made up of the segmentation of equal amount (normally, by three or more segmentations are joined together the component constructing grid component 10 with constituent part), the minimum key of each segmentation is acceptable.
In use, extra key will provide extra connection and torque-transmitting mechanisms, and this will prevent rotation A and B from producing relative displacement.By reducing the displacement of rotation A and B to keep them coaxial with axis 21, prevent rotary load to be sent on joint bolt, and finally avoid being separated and the functional fault of grid component 10 of the rotatable grid members in top 11 and the rotatable supporting structure 12 in below connected.
Therefore, as shown in the figure, grid component 10 of the present invention provides following effect: because plant factor makes more greatly production loss reduce, and the maintenance minimizing needed for keeping in repair the functional fault of grid component makes running cost reduce.In addition, advantageously, technical scheme provided by the present invention is retrofitted into existing installation and only needs small change.In other words, retrofiting to obtain advantage of the present invention to existing grid component is by carrying out relatively small change to realize to existing installation.
Claims (14)
1. the grid component of gasifier for gasifying to the carbonaceous material producing ash, described grid component comprises:
The rotatable grid members in top; And
The rotatable supporting structure in below, it is fastened on the rotatable grid members in described top by multiple removable fastening piece, described multiple removable fastening piece is for preventing the vertical displacement of the rotatable supporting structure of the rotatable grid members in described top and described below, the rotatable supporting structure in described below is constructed to rotate with driving around the common vertical rotation shared with the rotatable grid members in described top
Described grid component also comprises: at least two keyed torque transmitters, described at least two keyed torque transmitters angularly spaced apart relative to described common vertical rotation and with the rotatable engaged by support structure of the rotatable grid members in described top and described below, with when the rotatable supporting structure in described below is driven by moment of torsion from the rotatable supporting structure in described below be passed to described above rotatable grid members
Wherein, described keyed torque transmitter is not used in suppresses or prevent the vertical displacement of the rotatable supporting structure of the rotatable grid members in described top and described below without screw thread.
2. grid component according to claim 1, wherein,
Described keyed torque transmitter is angularly spaced apart in a horizontal plane around described common vertical rotation.
3. grid component according to claim 1, wherein,
Be provided with two keyed torque transmitters, and spaced apart 170 ° to 190 ° of described two keyed torque transmitters.
4. grid component according to claim 1, wherein,
Be provided with three keyed torque transmitters, and spaced apart 110 ° to 130 ° of described three keyed torque transmitters.
5. grid component according to claim 1, wherein,
Described keyed torque transmitter is arranged as many groups that two keyed torque transmitters are one group, and described two keyed torque transmitters of a group are positioned at diametrically position around described common vertical rotation.
6. grid component according to claim 1, wherein,
Described keyed torque transmitter is arranged to a circle and is opened by least one fastener separation between adjacent keyed torque transmitter, and described fastening piece is for suppressing or prevent the vertical displacement of the rotatable supporting structure of the rotatable grid members in described top and described below.
7. grid component according to claim 6, wherein,
Described fastening piece is the form of nut bolt structure.
8. grid component according to claim 1, wherein,
Described keyed torque transmitter is formed as from wider operated upper end to narrower operated lower end convergent.
9. grid component according to claim 1, wherein,
Described keyed torque transmitter has microscler polygonal profile in end view.
10. the gasifier for gasifying to carbonaceous material, described gasifier comprises grid component according to claim 1, described grid component is arranged on by the gasification chamber that limits of gasification vessel, and the rotatable supporting structure in described below of described grid component is connected with drive unit.
11. gasifiers according to claim 10, described gasifier is fixed-bed type gasifier.
12. gasifiers according to claim 10, described gasifier is fixed bed dry bottom formula gasifier.
13. gasifiers according to claim 12, described gasifier is coal, waste material or biomass gasifier, or described gasifier is configured to the gasifier two or more in coal, waste material and biomass being combined into promoting the circulation of qi.
14. gasifiers according to claim 13, described gasifier is the coal gasifier worked under the high pressure between 5 bar (g) and 100 bar (g) and the high temperature between 400 DEG C and 1600 DEG C.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1114700.6 | 2011-08-25 | ||
| GB1114700.6A GB2493957A (en) | 2011-08-25 | 2011-08-25 | Grate assembly for a gasifier with at least two key torque transmitters |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102952586A CN102952586A (en) | 2013-03-06 |
| CN102952586B true CN102952586B (en) | 2015-09-09 |
Family
ID=44838708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210303038.7A Expired - Fee Related CN102952586B (en) | 2011-08-25 | 2012-08-23 | The gasification of carbonaceous material |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20140230702A1 (en) |
| CN (1) | CN102952586B (en) |
| AU (1) | AU2012298213A1 (en) |
| GB (1) | GB2493957A (en) |
| WO (1) | WO2013027133A1 (en) |
| ZA (1) | ZA201401180B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014109397A1 (en) * | 2014-07-04 | 2016-01-07 | L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Rotary grate for a fixed bed gasification reactor |
| WO2018007854A1 (en) * | 2016-07-07 | 2018-01-11 | Babcock & Wilcox Vølund A/S | Movable grate for a furnace |
| CN108204591B (en) * | 2017-12-04 | 2019-10-25 | 北京建筑材料科学研究总院有限公司 | A kind of garbage pyrolysis gasification incinerator and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2349755A (en) * | 1943-02-03 | 1944-05-23 | Nichols Eng & Res Corp | Furnace construction |
| WO1999010094A1 (en) * | 1997-08-21 | 1999-03-04 | Sasol Technology (Proprietary) Limited | Discharge of solid particulate material from a bulk vessel containing such material |
| CN101072851A (en) * | 2004-12-08 | 2007-11-14 | 萨松卢尔吉技术有限公司 | Fixed bed coal gasifier |
| US20100050515A1 (en) * | 2008-09-04 | 2010-03-04 | Econo-Power International Corp. | Pressurized Gasification Apparatus to Convert Coal or Other Carbonaceous Material to Gas While Producing a Minimum Amount of Tar |
| CN201762288U (en) * | 2009-10-20 | 2011-03-16 | 广州市宇联机电有限公司 | Multi-grate biomass gasification furnace |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US337849A (en) * | 1886-03-16 | heaters | ||
| US1673575A (en) * | 1926-10-19 | 1928-06-12 | John D Martin | Furnace gratt |
| US1709902A (en) * | 1927-04-07 | 1929-04-23 | Adam B Fahnestock | Apparatus for feeding and burning fuel |
| JP2005337696A (en) * | 2004-04-30 | 2005-12-08 | Wako Kikai Kogyo Kk | Incinerator |
-
2011
- 2011-08-25 GB GB1114700.6A patent/GB2493957A/en not_active Withdrawn
-
2012
- 2012-07-24 US US14/240,238 patent/US20140230702A1/en not_active Abandoned
- 2012-07-24 AU AU2012298213A patent/AU2012298213A1/en not_active Abandoned
- 2012-07-24 WO PCT/IB2012/053758 patent/WO2013027133A1/en active Application Filing
- 2012-08-23 CN CN201210303038.7A patent/CN102952586B/en not_active Expired - Fee Related
-
2014
- 2014-02-17 ZA ZA2014/01180A patent/ZA201401180B/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2349755A (en) * | 1943-02-03 | 1944-05-23 | Nichols Eng & Res Corp | Furnace construction |
| WO1999010094A1 (en) * | 1997-08-21 | 1999-03-04 | Sasol Technology (Proprietary) Limited | Discharge of solid particulate material from a bulk vessel containing such material |
| CN101072851A (en) * | 2004-12-08 | 2007-11-14 | 萨松卢尔吉技术有限公司 | Fixed bed coal gasifier |
| US20100050515A1 (en) * | 2008-09-04 | 2010-03-04 | Econo-Power International Corp. | Pressurized Gasification Apparatus to Convert Coal or Other Carbonaceous Material to Gas While Producing a Minimum Amount of Tar |
| CN201762288U (en) * | 2009-10-20 | 2011-03-16 | 广州市宇联机电有限公司 | Multi-grate biomass gasification furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| US20140230702A1 (en) | 2014-08-21 |
| CN102952586A (en) | 2013-03-06 |
| GB2493957A (en) | 2013-02-27 |
| AU2012298213A1 (en) | 2014-03-13 |
| ZA201401180B (en) | 2015-04-29 |
| GB201114700D0 (en) | 2011-10-12 |
| NZ621271A (en) | 2015-06-26 |
| WO2013027133A1 (en) | 2013-02-28 |
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