CN201873701U - Belly pipe with coal powder pre-burning function - Google Patents
Belly pipe with coal powder pre-burning function Download PDFInfo
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- CN201873701U CN201873701U CN2010206399440U CN201020639944U CN201873701U CN 201873701 U CN201873701 U CN 201873701U CN 2010206399440 U CN2010206399440 U CN 2010206399440U CN 201020639944 U CN201020639944 U CN 201020639944U CN 201873701 U CN201873701 U CN 201873701U
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- short tube
- belly pipe
- premix burner
- coal dust
- plug
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Abstract
The utility model provides a belly pipe with a coal powder pre-burning function, which consists of a pre-burning device and a short belly pipe, wherein the pre-burning device is arranged between an air inlet and the short belly pipe. Coal powder is blown to an inlet of the pre-burning device, enters into the air inlet through the pre-burning device, and enters into a blast furnace with hot wind. The length of the pre-burning device is 1-2 times as long as the length of the air inlet, so that the time for heating and burning the coal powder in the pre-burning device and the air inlet can be greatly prolonged, and the burning ratio of the sprayed coal can be preferably improved. The coal powder is spread in the pre-burning device and is limited by a small-diameter outlet of the pre-burning device, so that the air inlet can not be worn; and the molten ash of the coal powder burn out in an air inlet passageway is condensed in the air inlet passageway to form into a protection layer, so that the wear resistance of the air inlet can be preferably improved. By adopting three gun inserting holes, the centre lines of the three gun inserting holes are projected on the vertical cross section of the centre line of the short belly pipe to be tangent to the same tangential circle with small diameter, therefore, the coal powder and the hot wind can be mixed with each other by means of rotational flow, and the coal powder can be preferably burnt.
Description
Technical field
The utility model belongs to the ironmaking technology field, relates to furnace coal spraying technology and air-supply arrangement, especially relates to a kind of belly pipe with coal dust pre-burning function.
Background technology
As everyone knows, in the blast furnace actual production, the method for existing coal powder injection is: one or two pulverized coal guns, and roughly be 10～13 ° angle oblique cutting with its medullary ray and go into belly pipe with the belly pipe medullary ray, coal dust is injected in the hot blast from spray gun.Under the normal circumstances, spray gun medullary ray and belly pipe medullary ray intersect at outside the end face of belly pipe head, and for the purpose of taking precautions against coal dust wearing and tearing air port, during actually operating, gun head is bent to certain angle, directly be inserted on the medullary ray of belly pipe, its position is the distance about 100～300mm to the passage of air port deeply.This has shortened coal dust greatly and carried out preheating and incendiary time in the passage of air port, and the utmost point is unfavorable for improving the rate of combustion of coal dust in stove.
By the gun head position is moved after the belly pipe channel interior, can increase the mixing time of coal dust and hot blast, and improve coal combustion rate.In Chinese patent ZL95117477.0 and ZL90212210.X technology, the mode of this raising coal combustion rate had been proposed once.
In ZL95117477.0, be that 120～200mm is moved in the gun head position behind original installation site, and the belly pipe outlet section before it, a swirler that 80～120mm is long has been installed.The problem of this kind implementation is: in the blast furnace normal productive process, spray gun can be from line bend after being heated, and this will cause coal dust directly to be washed into swirler, make it impaired; And the swirler in that the belly pipe outlet is provided with has also hindered the normal operation of blocking up, disclosing the air port.In addition, the distance of moving behind this spray gun is shorter, and the warm up time that coal dust increases in hot blast is shorter, and is limited to the effect of the rate of combustion that improves coal dust.
In ZL90212210.X, be that spray gun is inserted the belly pipe entry position from the peep hole upper limb, coal dust in the stroke in whole belly pipe and air port with the hot blast mixing and burning, its effect that improves coal combustion rate is fairly obvious.But this technology causes the spray gun of insertion to be approached the impact by the waist of vertical spray gun axis by hot blast, and make spray gun be heated lose intensity after, under the hot blast impact force action, bend sooner, this can't guarantee that spray gun according to the direction coal powder injection of invention intention along hot-air flow, will seriously cause the wearing and tearing of belly pipe inwall; Simultaneously, coal dust begins a large amount of burnings too early in belly pipe, will significantly improve temperature to 1500～1700 ℃ of hot-air flow, therefore, the metal of anti-material, belly pipe termination and the housing thereof that is laid at existing belly pipe exit region is impossible bear pyritous like this.
In existing patent ZL200820214896.3 technology, announced a kind of belly pipe of rush-harvesting and rush-planting coal powder injection.The technical measures that it is taked, be to seek to make 10～13 ° the level of the angle of spray gun medullary ray and belly pipe medullary ray less than routine, this makes the intersection point of spray gun medullary ray and belly pipe medullary ray, more go deep into the air port channel interior than prior art, this will significantly shorten the residence time of coal dust at the air port passage, and will be more unfavorable to the preheating and the burning of coal dust.In addition, this technology is distributed in spray gun in separately two quadrants, forms the effect that liquidates of skew symmetry coal injection, and the coal thigh converges the natural angle of formation when not utilizing rotational symmetry, satisfies the actual desirability of using the skew wind mouth of blast furnace.
In the prior art, the exit diameter to belly pipe does not have clear and definite restriction provision.Traditional method of design is: the exit diameter of belly pipe is greater than or equal to the diameter of air port inlet.This is reflected in the expression of patent ZL91224336.8, ZL95117477.0, ZL90212210.X accompanying drawing.This traditional method of design causes pulverized coal gun can not be arranged on channel interior away from the belly pipe outlet position.Because in a single day spray gun deflection takes place in belly pipe, perhaps coal dust has carried out abundant diffusion in belly pipe, will directly cause pulverized coal flow thigh wearing and tearing air port.
Summary of the invention
The purpose of this utility model is to propose a kind of gun head to be contracted to the belly pipe channel interior, can prevent coal thigh wearing and tearing air port, the belly pipe with coal dust pre-burning function.
A kind of belly pipe with coal dust pre-burning function, by premix burner with directly blow short tube and form, premix burner is arranged on the air port and directly blows between the short tube, between premix burner and air port by the contact seal of sphere termination, premix burner with directly blow short tube and connect by flange; The exit diameter of premix burner is less than the inlet diameter in air port, but is greater than or equal to the exit diameter in air port, and the utility model preferably equals the exit diameter in air port; The inlet diameter of premix burner is consistent with the exit diameter that directly blows short tube; Directly blowing on the short tube, be provided with two plug in rifle holes at least, plugging in the rifle centerline hole and directly blow the crossing angle of short tube medullary ray between 13～60 °; The medullary ray in each plug in rifle hole intersects at a point that directly blows on the short tube medullary ray jointly.
Above-mentioned premix burner has a water-cooled housing, is provided with cooling-water duct in the housing; The exit end of premix burner is heat-resistance stainless steel or copper protruding sphere termination, and inlet end is a flange; The length of premix burner is 1～2 times of air port passage length, preferably equals the length of air port passage at the utility model.Not isometric blast furnace, the length difference of its air port passage, generally between 200～900mm, the preferred 500mm of the utility model.At the inwall of premix burner hot-air channel, be inlaid with high temperature resistant, wear-resistant ceramic chamber lining, poured into a mould refractory materials between ceramic chamber lining and water-cooled housing.
The above-mentioned exit end that directly blows short tube is a flange, and inlet end and existing belly pipe are consistent, and is flange or concave spherical surface termination.
The utility model is when adopting three plug in rifle holes, and each plug in rifle hole is 120 ° in the distribution angle of directly blowing on the short tube circumference; When adopting two plug in rifle holes, be 60～150 ° in the distribution angle of directly blowing on the short tube circumference, the preferred distribution angle of the utility model example is 120 °.
The utility model is when three of employings and above plug in rifle hole thereof, and the medullary ray in each plug in rifle hole intersects at the same point on the belly pipe medullary ray jointly, and perhaps the projection on the vertical cross-section that directly blows the short tube medullary ray is tangential on the tangent line circle of same minor diameter.
The beneficial effects of the utility model are:
(1) the utility model has increased a premix burner between existing air port and belly pipe, and its passage length, exit diameter all equate with the length and the exit diameter of existing air port passage.Because the spray gun of pulverized coal injection in blast furnace is to be inserted into before the inlet of premix burner, this retreats the distance at least one air port than the plug in rifle position of existing blast furnace, being equivalent to the residence time of coal dust in the passage of existing air port is extended more than one times, help coal dust and in hot blast, spread and burn, can improve coal combustion rate.
(2) premix burner of the utility model employing is to adopt the water-cooled housing, can bear the high temperature that coal dust firing produces, and has security.At the hot-air channel inwall of premix burner, the high temperature resistant stupalith of being inlayed that resistance to wears is equivalent to the interior ceramic chamber lining of being inlayed of existing air port passage, has the ability of anti-coal dust wearing and tearing.The air port inwall can not be impacted and may wear to the minor diameter restriction that the coal dust of being jetted is exported by premix burner, appropriate protection the air port, will reduce leaking in stove greatly, and the damping down time and the cost in saving replacing air port because the air port is worn.Premix burner adopts flange and directly blows short tube and connects, rather than employing welds, and purpose is the ceramic chamber lining that is convenient for changing the premix burner inwall that may be worn and torn by coal dust.This shows that the premix burner that the utility model is provided with can play effective prevention and provide protection to the wearing and tearing in air port.
(3), when coal dust arrives in the stove through the preheating of an air port passage length and destructive distillation, possessed ablaze condition, and had the part fugitive constituent to take fire according to existing blast-furnace coal powder incendiary theory.Therefore, in the utility model example, because the premix burner exit diameter is littler than air port inlet diameter, when coal dust arrives the air port through the premix burner passage, diffuse to the unburned coal powder of premix burner channel edge, will be in the channel injection process of expansion of air port, mix fully with hot blast and fully burnt.In such cases, the coal powder fraction of after-flame will melt, and will be bonded on the wall after the cooling of air port vias inner walls, become the protective layer that one deck runs its course.This is unexistent Special Circumstances in the existing furnace coal spraying technology, and the guarantee air port is not worn also active effect.
(4) the utility model is when adopting two plug in rifle holes, and they are distributed in two adjacent quadrants, arranges axisymmetricly.Insert spray gun through them, after the pulverized coal flow thigh of being jetted converges, the projection on the plane of symmetry will form downward angle of crater; The center that this inclination angle helps pulverized coal flow thigh medullary ray and skew wind mouth passage is consistent, and this will reduce the hot-air flow possibility that coal dust impacts the air port inwall through air port passage break-in the time.
(5) the utility model is when adopting three and above plug in rifle hole, and medullary ray projection on the vertical cross-section that directly blows the short tube medullary ray in each plug in rifle hole can be tangential on the tangent line circle of same minor diameter.At this moment, the coal dust that sprays from each spray gun will form around the flow field of the circle rotation of this minor diameter, and this is very favourable with mixing of hot blast to quickening coal dust.
Description of drawings
Fig. 1 is the utility model embodiment one structural representation, is A-C-A cross sectional view among Fig. 3.
Fig. 2 is the utility model embodiment two structural representations, is A-C-A cross sectional view among Fig. 4.
Fig. 3 is the B B cross section left view of Fig. 1.
Fig. 4, Fig. 5 are the B-B cross section left view of Fig. 2.
In figure, 1 is the air port, and 2 is protruding sphere termination, and 3 is premix burner, and 4 is the water-cooled housing, and 5 is fire-resistant anti-material, and 6 is ceramic chamber lining; 7 is flange, and 8 is flange, and 9 for directly blowing short tube, and 10 for plugging in the rifle hole, and 11 is flange, and 12 is the concave spherical surface termination, and 13 are the tangent line circle.
Embodiment
Embodiment one.As shown in Figure 1, a kind of belly pipe with coal dust pre-burning function is by premix burner 3 with directly blow short tube 9 and form.Premix burner 3 is arranged on air port 1 and directly blows between the short tube 9.1 in premix burner 3 and air port be by 2 contact seals of protruding sphere termination, premix burner 3 with directly blow short tube 9 and connect by flange 7,8.The exit diameter of premix burner 3 is greater than or equal to the exit diameter in air port 1 less than the inlet diameter in air port 1, and the utility model embodiment one preferably equals the exit diameter in air port 1.The inlet diameter of premix burner 3 is consistent with the exit diameter that directly blows short tube 9.Directly blow and be provided with two plug in rifle holes 10 on the short tube 9, its plug in rifle hole 10 medullary rays and the crossing angle of directly blowing the short tube medullary ray are between 13 °～60 °, and the utility model embodiment one is preferably 15 °; The medullary ray in two plug in rifle holes 10 with directly blow short tube 9 medullary rays and intersect at same point.
Above-mentioned premix burner 3 has a water-cooled housing 4, is provided with cooling-water duct in the water-cooled housing 4.The exit end of premix burner 3 is heat-resistance stainless steel or copper protruding sphere termination 2, and inlet end is a flange 7.The length of premix burner 3 is 1～2 times of air port passage length, and the utility model embodiment one preferably equals the length of air port 1 passage.Not isometric blast furnace, the length difference of its air port 1 passage, generally between 200～900mm, the preferred 500mm of the utility model.At the inwall of premix burner 3 hot-air channels, be inlaid with high temperature resistant, wear-resistant ceramic chamber lining 6,4 of ceramic chamber lining 6 and water-cooled housings have been poured into a mould refractory materials 5.
The above-mentioned exit end that directly blows short tube 9 is a flange 8, and inlet end then is consistent with existing belly pipe, and as shown in Figure 1, inlet end is a flange 11.
As shown in Figure 3, preferred two the plug in rifle holes 10 of the utility model are 60 °～150 ° in the distribution angle of directly blowing on short tube 9 circumference, and the preferred distribution angle of the utility model is 120 °.Directly blow and poured into a mould refractory materials 5 in the short tube 9.
As Fig. 2 and shown in Figure 4, be the utility model embodiment two.The length of premix burner 3 is 1.5 times of air port 1 passage length, is 750mm.Three plug in rifle hole 10 medullary rays are 35 ° with directly blowing the angles that short tube 9 medullary rays intersect, and three plug in rifle holes 10 are uniform directly blowing short tube 9, and the medullary ray in three plug in rifle holes 10 intersects at a point that directly blows on short tube 9 medullary rays jointly.As shown in Figure 2, the above-mentioned inlet end that directly blows short tube 9 is concave spherical surface termination 12.
As shown in Figure 5, medullary ray projection on the vertical cross-section that directly blows short tube 9 medullary rays in three plug in rifle holes 10, the tangent line that is tangential on same minor diameter justifies 13.At this moment, the coal dust that sprays from each spray gun will form around the flow field of these tangent line circle 13 rotations, and this is very favourable with mixing of hot blast to quickening coal dust.When the utility model adopted plug in rifle hole 10 more than three, its arrangement form was that the equal mode for cloth with Fig. 4 or Fig. 5 is consistent.
In Fig. 1, Fig. 2, air port 1 is the prior art content, non-the utility model technology contents.Figure of description 1 is a Figure of abstract.
Claims (8)
1. belly pipe with coal dust pre-burning function is characterized in that: it is by premix burner and directly blow short tube and form; Premix burner is arranged on the air port and directly blows between the short tube, between premix burner and air port by the contact seal of sphere termination, premix burner with directly blow short tube and connect by flange; The exit diameter of premix burner is greater than or equal to the exit diameter in air port less than the inlet diameter in air port; The inlet diameter of premix burner is consistent with the exit diameter that directly blows short tube; Be provided with two plug in rifle holes on the short tube directly blowing, its plug in rifle centerline hole and the angle that intersects of directly blowing the short tube medullary ray between 13～60 °, the point that intersects be positioned at directly blow short tube export center point near.
2. aforesaid right requires 1 described belly pipe with coal dust pre-burning function, it is characterized in that: described premix burner has a water-cooled housing, and its exit end is protruding sphere termination, and inlet end is a flange.
3. aforesaid right requires 1 described belly pipe with coal dust pre-burning function, it is characterized in that: the length of described premix burner is 1～2 times of air port passage length.
4. aforesaid right requires 1 described belly pipe with coal dust pre-burning function, it is characterized in that: the inwall of described premix burner, be inlaid with high temperature resistant, wear-resistant ceramic chamber lining, and poured into a mould refractory materials between lining and water-cooled housing.
5. aforesaid right requires 1 described belly pipe with coal dust pre-burning function, it is characterized in that: the described exit end that directly blows short tube is a flange.
6. aforesaid right requires 1 described belly pipe with coal dust pre-burning function, it is characterized in that: described directly blowing when two plug in rifle holes are set on the short tube, two plug in rifle holes are 60～150 ° in the distribution angle of directly blowing on the short tube circumference.
7. aforesaid right requires 1 described belly pipe with coal dust pre-burning function, it is characterized in that: described directly blowing when three plug in rifle holes are set on the short tube, the medullary ray in each plug in rifle hole intersects at the same point on the belly pipe medullary ray jointly.
8. aforesaid right requires 1 described belly pipe with coal dust pre-burning function, it is characterized in that: described directly blowing when three plug in rifle holes are set on the short tube, the projection of medullary ray on the vertical cross-section that directly blows the short tube medullary ray in each plug in rifle hole, the tangent line that is tangential on same minor diameter is round.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206399440U CN201873701U (en) | 2010-12-01 | 2010-12-01 | Belly pipe with coal powder pre-burning function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206399440U CN201873701U (en) | 2010-12-01 | 2010-12-01 | Belly pipe with coal powder pre-burning function |
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| Publication Number | Publication Date |
|---|---|
| CN201873701U true CN201873701U (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206399440U Expired - Fee Related CN201873701U (en) | 2010-12-01 | 2010-12-01 | Belly pipe with coal powder pre-burning function |
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| Country | Link |
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| CN (1) | CN201873701U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102268496A (en) * | 2011-08-01 | 2011-12-07 | 张昭贵 | Method and device for intensifying combustion of injected pulverized coal in tuyere of blast furnace |
| CN102287829A (en) * | 2011-09-24 | 2011-12-21 | 徐道芹 | Direct flow and swirl flow joint outlet-type burner |
| CN102485915A (en) * | 2010-12-01 | 2012-06-06 | 张昭贵 | Blowpipe having pulverized coal precombustion function |
-
2010
- 2010-12-01 CN CN2010206399440U patent/CN201873701U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102485915A (en) * | 2010-12-01 | 2012-06-06 | 张昭贵 | Blowpipe having pulverized coal precombustion function |
| CN102268496A (en) * | 2011-08-01 | 2011-12-07 | 张昭贵 | Method and device for intensifying combustion of injected pulverized coal in tuyere of blast furnace |
| CN102287829A (en) * | 2011-09-24 | 2011-12-21 | 徐道芹 | Direct flow and swirl flow joint outlet-type burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WUXI SHILONG ENERGY TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHANG ZHAOGUI Effective date: 20140102 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 401122 YUBEI, CHONGQING TO: 214135 WUXI, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140102 Address after: 214135 Jiangsu city of Wuxi province Wuxi Taihu (International) science and Technology Park Qingyuan Road No. 20 building foundation E-106 Patentee after: WUXI SHILONG ENERGY SCIENCE & TECHNOLOGY CO., LTD. Address before: 401122, New International Plaza, 68 Jin Yu Avenue, North New District, Chongqing, 2-4-9 Patentee before: Zhang Zhaogui |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20141201 |
|
| EXPY | Termination of patent right or utility model |