CN102559973A - Blast furnace air supply device and pulverized coal injection and pulverized coal injection combustion method - Google Patents
Blast furnace air supply device and pulverized coal injection and pulverized coal injection combustion method Download PDFInfo
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- CN102559973A CN102559973A CN2010106036047A CN201010603604A CN102559973A CN 102559973 A CN102559973 A CN 102559973A CN 2010106036047 A CN2010106036047 A CN 2010106036047A CN 201010603604 A CN201010603604 A CN 201010603604A CN 102559973 A CN102559973 A CN 102559973A
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Abstract
The invention provides a blast furnace air supply device, which is characterized in that: a group of specially designed pipe tiles are arranged in a hot air channel between a peephole channel of an elbow and a contraction section of an outlet of a belly pipe, and divide the hot air channel into an inner layer and an outer layer, i.e., a central channel and an annular channel, so that hot air is fully or partially separated between the central channel and the annular channel. The invention provides a pulverized coal injection and pulverized coal injection combustion method, which are characterized in that: a spray gun is inserted into different positions of the central channel through the peephole channel to start coal injection, the injected pulverized coal, or together with part of hot air entering the central channel, realizes partial combustion, or is heated by thermal radiation of the central channel, and then forms co-axial flow with the hot air from the annular channel in the contraction section of the outlet of the belly pipe; and the pulverized coal is positioned at an axial center area, the hot air surrounds the pulverized coal, and the pulverized coal and the hot air enter an air inlet channel to be continuously mixed and combusted together, and then enter a blast furnace to realize full combustion. Since the first patent technology of pulverized coal injection is generated in 1926, the invention firstly provides a new technology that the co-axial pulverized coal injection in the contraction section of the outlet of the belly pipe is realized.
Description
Technical field
The invention belongs to technical field of blast furnace ironmaking, relate to furnace coal spraying technology and blast furnace air-supply technology, especially relate to air-supply apparatus of blast furnace and pulverized coal injection in blast furnace and incendiary method thereof.Background technology
As everyone knows; The existing method of pulverized coal injection in blast furnace is: on the belly pipe in each air port; 1 or 2 spray guns roughly are 10～13 ° angle oblique cutting with the belly pipe medullary ray with its medullary ray go into belly pipe, extend distance coal powder injection in hot blast of 100～300mm in the passage of air port.This has shortened coal dust greatly and in hot blast, has carried out preheating and incendiary time, and the utmost point is unfavorable for improving the rate of combustion of coal dust in stove.Simultaneously, in the hot-air channel of spray gun oblique cutting in the air port, stopped hot-air flow significantly, and caused very strong eddy current that this makes coal dust not pass through air port, the air port of will directly wearing and tearing after the part coal dust is involved in by eddy current along hot blast stream strand medullary ray according to the ideal mode.
Insert spray gun from peep hole, reach the ingress of belly pipe, whole belly pipe passage just becomes pulverized coal preheating, destructive distillation, incendiary space, and this has improved the rate of combustion of pulverized coal injection in blast furnace greatly.Chinese patent 90212210.X and patented claim 201010571275.2,201020639966.7 are just with this end in view.
In the 90212210.X patent, it is directly to pass through the hot-air channel space of elbow to spray gun along the upper limb of peep hole passage, reaches the belly pipe inlet and carries out coal powder injection.But this patent exists obviously not enough; Here it is: the hot blast through the elbow break-in comes, to approach the direction of vertical spray gun axis, impact spray gun by the waist; This must make spray gun be heated lose intensity after, under the effect of hot blast surging force, occur bending and deformation soon.Such result is to guarantee that spray gun is according to inventing the direction coal powder injection that is intended to be parallel to hot-air flow, with the wearing and tearing that seriously cause the belly pipe inwall.
In 201010571275.2 and 201020639966.7 patented claims; Though overcome the problems referred to above of 90212210.X patented claim through the mode that increases instlated tubular, they clearly do not propose the behavior solution of coal dust in the belly pipe passage.Under the prior art condition, conventional belly pipe is difficult to bear the high temperature problem that 201010571275.2 and 201020639966.7 patented claims are brought causes because of coal dust firing.Summary of the invention
The objective of the invention is on the basis of 201010571275.2 and 201020639966.7 patented claims; A kind of new air-supply apparatus of blast furnace and coal injection and incendiary method thereof are proposed; Insert at peep hole under the condition of rifle coal powder injection, form blast furnace air-supply and coal injection and the complete technical solution of incendiary thereof.
A kind of air-supply apparatus of blast furnace; Form by belly pipe and elbow; The protruding sphere termination that belly pipe contacts with the air port is a water-cooling structure, it is characterized in that: one group of special pipeline brick is embedded in the hot-air channel, the peep hole passage of elbow is extended to the ingress of belly pipe outlet contraction section; Two-layer inside and outside being separated into the hot-air channel of having inlayed pipeline brick part in elbow and the belly pipe, i.e. centre channel and circular channel; In this two-layer passage scope of living in, the space of centre channel and the space of circular channel, or realize being communicated with through the gap reserved between the section of tubing brick, or isolated fully by the pipeline brick.
Concrete implementation is such: in the hot-air channel of elbow and belly pipe; Outlet from the peep hole passage of elbow to elbow; Again from the inlet of belly pipe outlet contraction section ingress up to belly pipe; A, B, C type pipeline brick that its hot-air channel is embedded in wherein successively are two-layer inside and outside being separated into, i.e. centre channel and circular channel.A, B, C type pipeline brick are double-deck.Their interior pipe constitutes centre channel jointly, and this is equivalent to the peep hole passage of elbow is extended to the outlet contraction section ingress of belly pipe.Between their the interior pipe and outer tube, constituted the circular channel jointly.The outlet of centre channel and circular channel is next to the outlet contraction section ingress of belly pipe.Wherein: an end of A type pipeline brick is that interior pipe is than outer pipe range; Interior pipe passes the space at elbow hot-air channel break-in position; Insert in the anti-material of peep hole passage; The interior pipe and the peep hole channel connection of A type pipeline brick are integral, and like this, the centre channel in the A type pipeline brick promptly realizes spatially isolating fully with the hot-air channel of elbow.And outer tube is embedded in the anti-material of elbow hot-air channel wall, and therefore, the circular channel of A type pipeline brick and the hot-air channel of elbow are to be linked to be to be one, makes between centre channel and the circular channel of A type pipeline brick and can not scurry hot blast mutually.N piece Type B pipeline brick is right after the other end of A type pipeline brick and builds by laying bricks or stones; Between Type B pipeline brick and the A type pipeline brick and Type B pipeline brick each other, pipe all is tight seamless contacts with outer tube in it, makes between the centre channel and circular channel of Type B pipeline brick, has also kept the state of isolation hot blast.M piece C type pipeline brick is right after that the Type B pipeline is brick to be built; Between C type pipeline brick and the Type B pipeline brick and C type pipeline brick each other, the tight seamless contact of its outer tube, interior tube portion contact or do not contact fully; Realize being communicated with between the gap that these do not contact, the centre channel that makes C type pipeline brick and circular channel.Therefore; From the next hot blast of elbow hot-air channel; After must at first passing through the part circular channel of A, Type B pipeline brick in-scope; Could leak few part hot blast from this gap to centre channel, and most of hot blast continues still along the circular channel of C type pipeline brick in-scope, arrives belly pipe outlet contraction section.The hot blast that comes out from centre channel and circular channel gets into the air port in the lump after belly pipe outlet contraction section converges.This shows; In belly pipe outlet contraction section; The hot blast that comes out from centre channel is to be coaxial flowing relation with the hot blast that comes out from the circular channel, that is: the hot blast that comes out of circular channel surrounds the hot blast that centre channel is come out fully, and both heading is identical.
Above-mentioned A, B, C type pipeline brick are double-deck, are distributed with the strut member of equal amts in it between pipe and the outer tube, and this strut member strikes up partnership inner and outer pipes.A, B, C type pipeline brick are the refractory materialss that mechanism is burnt till, and are that material serves as preferred with SiC., elbow and belly pipe build by laying bricks or stones after pouring anti-material by part.This strut member is all or part of to be rectilinear form or helix shape.In that strut member is all or part of when being helix shape, the hot blast that comes out from above-mentioned circular channel is the eddy flow hot blast.
Above-mentioned A type pipeline brick, its end be interior pipe than outer pipe range 300mm about, but the interior pipe of the other end is concordant with outer tube.This A type pipeline brick or add one section pipe shape pipe of anti-material the about 300mm by Type B pipeline brick and combine, or global formation.
Above-mentioned Type B pipeline brick, its interior pipe and the equal in length of outer tube, and the inner and outer pipes at two ends all is concordant.
Above-mentioned C type pipeline brick, its interior pipe is shorter roughly between 2～10mm than outer tube, is concordant but the interior pipe of an end is wherein arranged with outer tube.Perhaps its interior pipe all is simultaneously concordant with outer tube equal in length and its two ends, but is provided with the part breach on inner pipe.Like this, when closely the mode of contact is built by laying bricks or stones between C type pipeline brick is according to outer tube, between two bricks of next-door neighbour, the gap that pipe will form the annular gap each other or be interrupted in it.Adjust the width in these gaps, can adjust the hot blast quantity that gets into centre channel, the hot blast flow velocity in control center's passage.
Above-mentioned C type pipeline brick, its interior pipe is increaser or straight tube.The present invention is preferably increaser.When it was increaser, the interior pipe of m piece C type pipeline brick formed continuous hole enlargement relation jointly; That is: the interior pipe of each piece C type pipeline brick; Its exit diameter is all greater than inlet diameter, but the outlet internal diameter of last brick equals the inlet internal diameter of a back brick, and the like.
Above-mentioned Type B pipeline brick, the quantity n of its configuration is greater than or equal to 1, and all the other are made up of an A type pipeline brick and several piece C type pipeline brick, and are constant with the length that keeps double-deck passage.
Above-mentioned C type pipeline brick, the quantity m of its configuration is greater than or equal to 0.When m equaled 0, whole double-deck passage was made up of an A type pipeline brick and remaining Type B pipeline brick, also keeps the length of double-deck passage to fix.
A kind of method of pulverized coal injection in blast furnace; Be that spray gun inserts in the centre channel of elbow or belly pipe from the peep hole passage; Or from the peep hole passage directly pass elbow and belly pipe whole centre channel, be inserted in the outlet contraction section of belly pipe, pulverized coal injection in blast furnace is in centre channel or in the outlet contraction section of belly pipe, carry out.
A kind of combustion method of pulverized coal injection in blast furnace; Be when spray gun carries out coal powder injection in the centre channel of peep hole passage insertion elbow or belly pipe; The coal dust that is sprayed is in centre channel mobile stroke; Or by the thermal radiation direct heating of centre channel inwall, or the hot blast of entering centre channel mixes and the implementation part burning from the circular channel together; And spray gun pass elbow or belly pipe centre channel, be inserted into when carrying out coal powder injection in the outlet contraction section of belly pipe, the coal dust that is sprayed bears the thermal radiation of centre channel inwall in spray gun, by indirect heating; These are by indirect heating, or by direct heating, or implementation part incendiary coal dust, in the outlet contraction section of belly pipe, and coaxial the flowing of hot blast that beginning is come out with the circular channel; Coal dust is positioned at the central zone of axle, and hot blast is centered around around the coal dust, and they get into the air port passage together and continue mixing and burning, gets at last again and realizes fully burning in the State of Blast Furnace.
Above-mentioned pulverized coal injection in blast furnace and incendiary method thereof are achieved in that
One of method: be that spray gun is inserted the centre channel of elbow and belly pipe from the peep hole passage, place spray gun outlet end points in the scope at Type B pipeline brick place.Because the centre channel of A, Type B pipeline brick and its circular channel are to isolate hot blast, this does not just have hot blast to flow near making spray gun outlet end points.Therefore, in such cases, pulverized coal injection does not begin to carry out in having hot blast mobile particular surroundings.The coal dust of in centre channel, being jetted, the scope that arrive C type pipeline brick place could begin to contact hot blast.In the scope at C type pipeline brick place, from the brick gap of building of C type pipeline, flow to the hot blast of centre channel successively, participate in preheating, destructive distillation and the combustion processes of coal dust one by one.Through the centre channel stroke at C type pipeline brick place, coal dust is in the partial combustion state.It is right after the outlet contraction section that gets into belly pipe; Beginning is flowed with the hot blast that comes out from the circular channel is coaxial, and coal dust is positioned at a central zone, and hot blast is centered around around the coal dust; They get into the air port passage together and continue mixing and burning, get at last again and realize fully burning in the State of Blast Furnace.Compared with prior art, this method is equivalent to realize the partially combusted coal dust of winding-up in State of Blast Furnace.
Two of method: be that spray gun is inserted the centre channel of elbow and belly pipe from the peep hole passage, place spray gun outlet end points in the scope at C type pipeline brick place.Because the centre channel and the circular channel of C type pipeline brick are communicated with; And,, be size decision by this gap from the hot blast quantity of the brick gap entering centre channel of building of C type pipeline; The flow of its hot blast and speed-controllable; Therefore, in such cases, pulverized coal injection is in controlled hot blast environment, to begin to carry out.In the scope at C type pipeline brick place, the brick gap of building of C type pipeline after spray gun outlet end points, flow to the hot blast of centre channel successively, participate in preheating, destructive distillation and the combustion processes of coal dust one by one; Through the centre channel stroke of C type pipeline brick, coal dust is in the partial combustion state.It is right after and gets into belly pipe outlet contraction section again; Beginning is flowed with the hot blast that comes out from the circular channel is coaxial, and coal dust is positioned at a central zone, and hot blast is centered around around the coal dust; They get at last again and realize fully burning in the State of Blast Furnace after getting into air port passage continuation mixing and burning together.Compared with prior art, this method also is equivalent to realize the partially combusted coal dust of winding-up in State of Blast Furnace.
In two kinds of above-mentioned methods, if C type pipeline brick all is replaced by Type B pipeline brick, i.e. the quantity m of C type pipeline brick configuration equals at 0 o'clock, and then the spray gun coal dust of in centre channel, being jetted can not reencounter with hot blast in centre channel.In such cases, coal dust will be by the thermal radiation direct heating of centre channel inwall.Compared with prior art, this method also be equivalent to have realized in State of Blast Furnace winding-up by direct heating coal dust.
Three of method: be that spray gun is inserted the centre channel of elbow and belly pipe from the peep hole passage, directly pass centre channel to spray gun outlet end points, place in the outlet contraction section of belly pipe.At this moment and since the belly pipe centre channel just by A, the Type B pipeline is brick builds, and does not have hot blast to flow in the centre channel, the thermal radiation that the just long distance of spray gun is born the centre channel tube wall, coal dust in spray gun by indirect heating.The coal dust of therefore, being jetted also is preheat mode.In belly pipe outlet contraction section, by coaxial the flowing of hot blast of the coal dust of preheating and ejection from the circular channel.Coal dust is positioned at a central zone, and hot blast is centered around around the coal dust, and they get at last again and realize fully burning in the State of Blast Furnace after getting into air port passage continuation mixing and burning together.Compared with prior art, this method be equivalent to have realized in State of Blast Furnace winding-up by indirect heating coal dust.
In above-mentioned pulverized coal injection in blast furnace and incendiary method thereof, employed spray gun is conventional single tube coal spouting gun, or band is spied on the sleeve pipe coal spouting gun of function.
The invention has the beneficial effects as follows:
(1) the present invention is on the basis of 201010571275.2 and 201020639966.7 patented claims; The new air-supply apparatus of blast furnace of different structure mode has been proposed; The method of different pulverized coal injection in blast furnace and the novel method of corresponding coal dust firing have been proposed simultaneously; Formed at peep hole and inserted under the rifle coal powder injection condition technical solution that blast furnace air-supply and coal injection and incendiary thereof are complete.Therefore, the present invention has continued the beneficial effect of 201010571275.2 and 201020639966.7 patented claims, and has produced more, controlled, as can be optimized adjustment with the different situations of blast furnace novel methods.
(2) the present invention has overcome the problem that 201010571275.2 and 201020639966.7 patented claims possibly exist; Promptly plugging in rifle to belly pipe from peep hole enters the mouth; Possibly make the burning of coal dust in belly pipe excessive, cause and to adopt the water-cooled belly pipe, will bring bigger thermosteresis thus.One of beneficial effect of the present invention is both to have limited the quantity of coal dust in the belly pipe internal combustion, has prevented the high temperature appearance; Also limit simultaneously coal dust diffusion fully too early in belly pipe, can eliminate the coking problem that coal dust possibly occur at the belly pipe wall.
(3) the present invention increases the pipeline brick in existing belly pipe, and simple, cost is low, have and existing belly pipe between interchangeability.Jet and get into the coal dust of blast furnace, all arrive at the outlet contraction section of belly pipe from the centre channel of double-deck passage, formed coaxial flowing relation with the hot blast that from the circular channel of double-deck passage, comes out again afterwards.Like this, thoroughly overcome the problem in oblique cutting spray gun interference hot-air flow flow field in the existing coal powder injection technology, stopped to produce the possibility of eddy current, thereby eliminated the main inducing in coal dust wearing and tearing air ports.Because the hot blast speed in the circular channel is far longer than effusive coal dust speed from centre channel, the design of collapsible tube form has been adopted in the outlet that adds belly pipe, and the hot blast that is come out in the circular channel can obtain the component velocity at the center of pointing to.This component velocity plays compressive action to the coal dust of axle center flow, and therefore, coal dust will better be limited in the hot-air flow central zone, can prevent that coal dust from touching the air port.This has been since nineteen twenty-six produces first coal powder injection patent, proposes first and the reliable new technology of in belly pipe outlet contraction section, carrying out coaxial coal powder injection that realizes.
(4) safety of the present invention, reliable, controlled with coal dust or preheating or partial combustion is delivered into blast-furnace roasting on this basis again, to improving the coal dust quantity and the rate of combustion of blast furnace, has apodeictic effect.
(5) one of coal injection method of the present invention's proposition is: coal powder injection in not having hot blast mobile particular surroundings in the centre channel of belly pipe.Under this mode, spray gun is the radiogenic heat of acceptor center passage tube wall only, and compared with prior art, the working conditions of spray gun is very improved, and the life-span of spray gun will prolong undoubtedly greatly.Description of drawings
Fig. 1 is the structure sectional view of the embodiment of the invention 1.
Fig. 2 is the structure sectional view of the embodiment of the invention 2.
Fig. 3 is Fig. 1,2,3 A-A cross sectional view.
Fig. 4 is Fig. 1,2 B-B cross sectional view.
Fig. 5 is the structure sectional view of the embodiment of the invention 3.
In figure, 1 is the air port, and 2 is belly pipe, and 21 is protruding sphere termination, and 22 are the outlet contraction section, and 3 is elbow, and 4 is A type pipeline brick, and 5 is Type B pipeline brick, and 6 is C type pipeline brick; 7 is the gap, and 8 is centre channel, and 9 is the circular channel, and 10 is hot-air channel, and 11 is spray gun, and 12 is the spray gun exit end, and 13 is the peep hole passage, and 14 is interior pipe, and 15 is outer tube, and 16 is strut member.Embodiment
Like Fig. 1 is embodiment 1, is embodiment 2 like Fig. 2, is embodiment 3 like Fig. 5.
In Fig. 1,2, air-supply apparatus of blast furnace is made up of belly pipe 2 and elbow 3, and belly pipe 2 has the protruding sphere termination 21 of a water-cooling structure.In the hot-air channel 10 of elbow 3 and belly pipe 2; Outlet from the peep hole passage 13 of elbow 3 to elbow 3; Again from the inlet of belly pipe 2 outlet contraction section 22 ingress up to belly pipe 2; A, B, C type pipeline brick 4,5,6 that its hot-air channel 10 is embedded in wherein successively are two-layer inside and outside being separated into, i.e. centre channel 8 and circular channel 9.A, B, C type pipeline brick the 4,5, the 6th, double-deck.Their interior pipe 14 common formation centre channels 8, this is equivalent to the peep hole passage 13 of elbow 3 is extended to outlet contraction section 22 ingress of belly pipe 2.Between their the interior pipe 14 and outer tube 15, constituted circular channel 9 jointly.The outlet of centre channel 8 and circular channel 9 is next to outlet contraction section 22 ingress of belly pipe 2.Wherein: an end of A type pipeline brick 4 is that interior pipe 14 is longer than outer tube 15; Interior pipe 14 passes the space at the hot-air channel 10 break-in positions of elbow 3; Insert in the anti-material of peep hole passage 13; The interior pipe 14 of A type pipeline brick 4 is communicated with peep hole passage 13 is integral, realize spatially isolating fully with the hot-air channel 10 of elbow 3.And outer tube 15 is embedded in the anti-material of elbow 3 hot-air channels 10 walls.Therefore, the circular channel 9 of A type pipeline brick 4 is communicated as one with the hot-air channel 10 of elbow 3.This makes between centre channel 8 and the circular channel 9 of A type pipeline brick 4 can not scurry hot blast mutually.The other end that n piece Type B pipeline brick 5 is right after A type pipeline brick 4 is built by laying bricks or stones, between Type B pipeline brick 5 and the A type pipeline brick 4 and Type B pipeline brick 5 each other, pipe 14 all is tight seamless contacts with outer tube 15 in it.This makes between the centre channel 8 and circular channel 9 of Type B pipeline brick 5, has also kept isolating the state of hot blast.M piece C type pipeline brick 6 is right after Type B pipeline brick 5 and builds by laying bricks or stones, between C type pipeline brick 6 and the Type B pipeline brick 5 and C type pipeline brick 6 each other, its outer tube 15 tight seamless contacts, interior pipe 14 parts contact or do not contact fully.These gaps that do not contact 7 are communicated with 9 realizations of centre channel 8 and circular channel of C type pipeline brick 6.Therefore; Hot blast from elbow 3 hot-air channels 10; Must be at first through behind the circular channel 9 by A, Type B pipeline brick 5 in-scopes; Could leak few part hot blast from this gap 7 to centre channel 8, and most of hot blast still continues to arrive along the circular channel 9 of C type pipeline brick 6 in-scopes the outlet contraction section 22 of belly pipe 2.The hot blast that comes out from centre channel 8 and circular channel 9 could get into blast-furnace tuyere 1 after belly pipe 2 outlet contraction sections 22 converge.This shows; In belly pipe 2 outlet contraction sections 22; The hot blast that comes out from centre channel 8 is with 9 hot blasts that come out are to be coaxial flowing relation from the circular channel, that is: the hot blast that comes out of circular channel 9 surrounds the hot blast that centre channel 8 is come out fully, and both heading is identical.
In Fig. 3,4, above-mentioned A, B, C type pipeline brick 4,5,6 are distributed with the strut member 16 of equal amts in it between pipe 14 and the outer tube 15, and this strut member 16 strikes up partnership interior pipe 14 with outer tube 15.A, B, C type pipeline brick the 4,5, the 6th, the refractory materials that mechanism is burnt till is that material serves as preferred with SiC., elbow 3 and belly pipe 2 build by laying bricks or stones after pouring anti-material by part.This strut member 16 is all or part of to be straight line or helix shape.When strut member 16 was all or part of helix shape, the hot blast that comes out from above-mentioned circular channel 9 was the eddy flow hot blast.
In Fig. 1,2,5, above-mentioned A type pipeline brick 4, its end be interior pipe 14 than outer tube 15 long 300mm about, but the interior pipe 14 of the other end is concordant with outer tube 15.This A type pipeline brick 4 or add one section pipe shape pipe of anti-material the about 300mm by Type B pipeline brick 5 and combine, or global formation.
In Fig. 1,2,5, above-mentioned Type B pipeline brick 5, the equal in length of its interior pipe 14 and outer tube 15, and the inner and outer pipes 15 at two ends all is concordant.
In Fig. 1,2, above-mentioned C type pipeline brick 6, its interior pipe 14 is shorter roughly between 2～10mm than outer tube 15, and it is concordant with outer tube 15 that the interior pipe 14 of an end is wherein arranged; Perhaps its interior pipe 14 all is simultaneously concordant with outer tube 15 equal in length and its two ends, but on interior pipe 14, is provided with the part breach.Like this, when C type pipeline brick 6 when closely the modes of contact are built by laying bricks or stones each other according to outer tube 15, then in two of the next-door neighbour pipe 14 each other, with the gap 7 that forms cyclic gap 7 or be interrupted.Adjust the width in these gaps 7, can adjust the hot blast quantity that gets into centre channel 8, the hot blast flow velocity in control center's passage 8.
In Fig. 1,2, above-mentioned C type pipeline brick 6, its interior pipe 14 is increaser or straight tube.The present invention is preferably increaser.When it was increaser, the interior pipe 14 of m piece C type pipeline brick 6 formed continuous hole enlargement relation jointly.Be pipe 14 in each piece brick, its exit diameter is all greater than inlet diameter, but the outlet internal diameter of last brick equals the inlet internal diameter of pipe 14 in the back brick, and the like.
In Fig. 1,2,5, above-mentioned Type B pipeline brick 5, the quantity n of its configuration is greater than or equal to 1, and all the other are made up of an A type pipeline brick 4 and 6 of several piece C type pipeline bricks, fix with the length that keeps double-deck passage.
In Fig. 5, above-mentioned C type pipeline brick 6, the quantity m of its configuration is greater than or equal to 0.When m equaled 0, whole double-deck passage was made up of an A type pipeline brick 4 and remaining 5 of Type B pipeline brick, also keeps the length of double-deck passage to fix.
Embodiment 1
Like Fig. 1 is embodiments of the invention 1.It is to place the typical case in Type B pipeline brick 5 in-scopes to 12 of spray gun exit end.This situation is that 12 of spray gun exit end extend near the outlet of A type pipeline brick 4, has farthest utilized centre channel 8 as preheating or incendiary space, can bring into play the present invention to improving coal combustion rate and the maximum effect that increases coal powder injection quantity.
As shown in Figure 1, spray gun 11 is to insert the centre channel 8 of elbow 3 and belly pipe 2 from peep hole passage 13, and 12 of spray gun exit end are placed in the scope at Type B pipeline brick 5 places.Because centre channel 8 and its circular channel 9 of A, Type B pipeline brick 4,5 are to isolate hot blast, this does not just have hot blast to flow near making 12 of spray gun exit end.Therefore, in such cases, pulverized coal injection does not begin to carry out in having hot blast mobile particular surroundings.The coal dust of in centre channel 8, being jetted, the scope that arrive C type pipeline brick 6 places could begin to contact hot blast.In the scope at C type pipeline brick 6 places, from the gap 7 that C type pipeline brick 6 is built by laying bricks or stones, flow to the hot blast of centre channel 8 successively, participate in preheating, destructive distillation and the combustion processes of coal dust one by one.Through centre channel 8 strokes of C type pipeline brick 6, coal dust is in the partial combustion state.It is right after the outlet contraction section 22 that gets into belly pipe 2, and beginning is with 9 coaxial the flowing of hot blast of coming out from the circular channel.Coal dust is positioned at a central zone, and hot blast is centered around around the coal dust, and they get into air port 1 passage together and continue mixing and burning, gets at last again and realizes fully burning in the State of Blast Furnace.Compared with prior art, this method is equivalent to realize the partially combusted coal dust of winding-up in State of Blast Furnace.
Like Fig. 2 is embodiments of the invention 2.It is to place the typical case in C type pipeline brick 6 in-scopes to 12 of spray gun exit end.This situation is that 12 of exit end extend near the outlet of Type B pipeline brick 5; The centre channel 8 of farthest having utilized C type pipeline brick 6 is as hot blast and pulverized coal preheating and incendiary space; When preventing in Type B pipeline brick 5 in-scopes coal powder injection, coal dust sedimentation and accumulation in centre channel 8 take place.Simultaneously; Can be different according to the length that C type pipeline brick 6 is provided with; Adjust the quantity of coal dust firing in the centre channel 8, the suit property that changes in the face of various complex conditions such as different blast furnaces, different material, different wind-warm syndrome and oxygen enrichment level, different coals etc. is provided for the present invention.
As shown in Figure 2, spray gun 11 is to insert the centre channel 8 of elbow 3 and belly pipe 2 from peep hole passage 13, and 12 of spray gun exit end are placed in the scope at C type pipeline brick 6 places.Because the centre channel 8 and the circular channel 9 of C type pipeline brick 6 are communicated with, and, from the hot blast quantity of the gap 7 entering centre channels 8 that C type pipeline brick 6 is built by laying bricks or stones, be size decision by this gap 7, its hot air flow and speed-controllable.Therefore, in such cases, pulverized coal injection is in controlled hot blast environment, to begin to carry out.In the scope at C type pipeline brick 6 places, from the gap 7 that 12 C type pipeline bricks 6 afterwards of spray gun exit end are built by laying bricks or stones, flow to the hot blast of centre channel 8 successively, participate in preheating, destructive distillation and the combustion processes of coal dust one by one.Through centre channel 8 strokes of C type pipeline brick 6, coal dust is in the partial combustion state.It is right after the outlet contraction section 22 that gets into belly pipe 2 again, and beginning is flowed with 9 hot blasts that come out are coaxial from the circular channel.Coal dust is positioned at a central zone, and hot blast is centered around around the coal dust, and they get at last again and realize fully burning in the State of Blast Furnace after getting into air port 1 passage continuation mixing and burning together.Compared with prior art, this method also is equivalent to realize the partially combusted coal dust of winding-up in State of Blast Furnace.
In Fig. 1,2, if C type pipeline brick 6 all is replaced by Type B pipeline brick 5, i.e. the quantity m of C type pipeline brick 6 configuration equals 0, spray gun 11 coal dust of centre channel 8 in, being jetted then, can not be in centre channel 8 and hot blast reencounter.In such cases, coal dust will be by the thermal radiation direct heating of centre channel 8 inwalls.Compared with prior art, this method also be equivalent to have realized in State of Blast Furnace winding-up by direct heating coal dust.
Like Fig. 5 is embodiments of the invention 3.Be directly to pass 12 of spray gun exit end centre channel 8, get into the typical case of carrying out coal powder injection in the belly pipe 2 outlet contraction sections 22.This situation has provided a kind of new mode the most similar with existing coal powder injection technology, and convenient production user under prior art thought condition can understand, accepts and use the present invention sooner.
As shown in Figure 5, spray gun 11 inserts the centre channel 8 of elbow 3 and belly pipe 2 from peep hole passage 13, and 12 of spray gun exit end directly pass centre channel 8, are placed in the outlet contraction section 22 of belly pipe 2.Because this moment, belly pipe 2 centre channels 8 were just built by laying bricks or stones by A, Type B pipeline brick 4,5, do not have hot blast to flow in the centre channel 8, just spray gun 11 is long apart from the thermal radiation of bearing centre channel 8 tube walls, coal dust in spray gun 11 by indirect heating.The coal dust of therefore, being jetted also is preheat mode.In belly pipe 2 outlet contraction sections 22; By coaxial the flowing of hot blast of the coal dust of preheating and 9 ejections from the circular channel, coal dust is positioned at a central zone, and hot blast is centered around around the coal dust; They get at last again and realize fully burning in the State of Blast Furnace after getting into air port 1 passage continuation mixing and burning together.Compared with prior art, this method be equivalent to have realized in State of Blast Furnace winding-up by indirect heating coal dust.
In Fig. 1,2,5, in above-mentioned various pulverized coal injection in blast furnace and combustion method thereof, employed spray gun 11 is conventional single tube coal spouting guns, or band is spied on the sleeve pipe coal spouting gun of function.
Like different embodiments of the invention Fig. 1,2, shown in 5, belly pipe 2 or level, perhaps tilt to install.Therefore, content of the present invention also comprises the various optional combination that different belly pipe 2 installation forms, different spray gun 11 forms, different spray gun 11 are plugged in rifle position, different brick type collocation forms.Such as, above-mentionedly change the C type pipeline brick among Fig. 1,2 into Type B pipeline brick, perhaps be necessary to change Type B pipeline brick into C type pipeline brick under the condition at other, also belong to protection scope of the present invention.
Figure of description 2 is a Figure of abstract.Part 1,11 is the prior art content in the accompanying drawing, non-technology contents of the present invention.
Claims (3)
1. air-supply apparatus of blast furnace; Form by belly pipe and elbow; The protruding sphere termination that belly pipe contacts with the air port is a water-cooling structure, it is characterized in that: one group of special pipeline brick is embedded in the hot-air channel, the peep hole passage of elbow is extended to the ingress of belly pipe outlet contraction section; Two-layer inside and outside being separated into the hot-air channel of having inlayed pipeline brick part in elbow and the belly pipe, i.e. centre channel and circular channel; In this two-layer passage scope of living in, the space of centre channel and the space of circular channel, or realize being communicated with through the gap reserved between the section of tubing brick, or isolated fully by the pipeline brick.
2. the method for a pulverized coal injection in blast furnace; Be that spray gun inserts in the centre channel of elbow or belly pipe from the peep hole passage; Or from the peep hole passage directly pass elbow and belly pipe whole centre channel, be inserted in the outlet contraction section of belly pipe, it is characterized in that: pulverized coal injection in blast furnace is in centre channel or in the outlet contraction section of belly pipe, carry out.
3. the combustion method of a pulverized coal injection in blast furnace; Be when spray gun carries out coal powder injection in the centre channel of peep hole passage insertion elbow or belly pipe; The coal dust that is sprayed is in centre channel mobile stroke; Or by the thermal radiation direct heating of centre channel inwall, or and the hot blast that gets into centre channel from the circular channel mix and the implementation part burning; And spray gun pass elbow or belly pipe centre channel, be inserted into when carrying out coal powder injection in the outlet contraction section of belly pipe, the coal dust that is sprayed bears the thermal radiation of centre channel inwall in spray gun, by indirect heating; It is characterized in that: these are by indirect heating, or by direct heating, or implementation part incendiary coal dust, in the outlet contraction section of belly pipe, and coaxial the flowing of hot blast that beginning is come out with the circular channel; Coal dust is positioned at the central zone of axle, and hot blast is centered around around the coal dust, and they get into the air port passage together and continue mixing and burning, gets at last again and realizes fully burning in the State of Blast Furnace.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106036047A CN102559973A (en) | 2010-12-21 | 2010-12-21 | Blast furnace air supply device and pulverized coal injection and pulverized coal injection combustion method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106036047A CN102559973A (en) | 2010-12-21 | 2010-12-21 | Blast furnace air supply device and pulverized coal injection and pulverized coal injection combustion method |
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| CN102559973A true CN102559973A (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010106036047A Pending CN102559973A (en) | 2010-12-21 | 2010-12-21 | Blast furnace air supply device and pulverized coal injection and pulverized coal injection combustion method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312029A (en) * | 2011-01-24 | 2012-01-11 | 张昭贵 | Air supplying device of blast furnace as well as combustion method and oxygen-enriching method of injected coal powder thereof |
| CN114018058A (en) * | 2022-01-10 | 2022-02-08 | 唐山精研实业有限责任公司 | Composite material oxygen coal spray gun |
| CN114877368A (en) * | 2022-03-30 | 2022-08-09 | 华能伊敏煤电有限责任公司汇流河热电分公司 | High-moisture low-heat Yimin coal plasma ignition method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2068510U (en) * | 1990-05-07 | 1991-01-02 | 东南大学 | Fine coal blowing unit of blast furnace |
| CN201561656U (en) * | 2009-11-30 | 2010-08-25 | 宝钢工程技术集团有限公司 | Pulverized coal gun for smelting reduction furnace |
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- 2010-12-21 CN CN2010106036047A patent/CN102559973A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2068510U (en) * | 1990-05-07 | 1991-01-02 | 东南大学 | Fine coal blowing unit of blast furnace |
| CN201561656U (en) * | 2009-11-30 | 2010-08-25 | 宝钢工程技术集团有限公司 | Pulverized coal gun for smelting reduction furnace |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312029A (en) * | 2011-01-24 | 2012-01-11 | 张昭贵 | Air supplying device of blast furnace as well as combustion method and oxygen-enriching method of injected coal powder thereof |
| CN114018058A (en) * | 2022-01-10 | 2022-02-08 | 唐山精研实业有限责任公司 | Composite material oxygen coal spray gun |
| CN114877368A (en) * | 2022-03-30 | 2022-08-09 | 华能伊敏煤电有限责任公司汇流河热电分公司 | High-moisture low-heat Yimin coal plasma ignition method and device |
| CN114877368B (en) * | 2022-03-30 | 2024-05-31 | 华能伊敏煤电有限责任公司汇流河热电分公司 | High-moisture low-heat plasma ignition method and device for Imine coal |
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Application publication date: 20120711 |