CN102286649B - Water spraying gun for lowering stock line of blast furnace - Google Patents
Water spraying gun for lowering stock line of blast furnace Download PDFInfo
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- CN102286649B CN102286649B CN 201110232517 CN201110232517A CN102286649B CN 102286649 B CN102286649 B CN 102286649B CN 201110232517 CN201110232517 CN 201110232517 CN 201110232517 A CN201110232517 A CN 201110232517A CN 102286649 B CN102286649 B CN 102286649B
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Abstract
The invention relates to a water spraying gun for lowering a stock line of a blast furnace, and is mainly used in a process operation for lowering the temperature of coal gas at the furnace top in a process for lowering the stock line of the blast furnace. The water spraying gun comprises a gun seat and a gun rod, wherein one end of the gun rod is equipped with a connecting flange, a water inflow pipe and a nitrogen input port; the gun rod has an inner cavity and an outer cavity both of which are composed of an inner pipe and a sleeve; the gun rod is composed of a segment with spraying holes and a segment without spraying holes; 3 rows of spraying holes are separately formed on the inner pipe and the sleeve of the gun rod in the segment with the spraying holes; the spraying holes in adjacent two rows are alternate; the included angle between the first row of spraying holes and a center line of the second row is alpha; the included angle between the second row of spraying holes and a center line of the third row is alpha; the spraying holes on the inner pipe and sleeve are coaxial; the diameter of the spraying holes on the inner pipe is 3 mm; and the spraying holes on the sleeve are funnel-shaped holes with inner wall port diameter of 5 mm and outer wall port diameter of 8 mm. By using the water spraying gun, the water spraying effect and water fog spraying uniformity are improved, the hydrogen (H2) content in the coal gas at the furnace top is low in blowing-out process, and the coal gas cooling effect is good.
Description
Technical field
The present invention is mainly used in blast furnace stopping and falls in the stockline process, reduces the furnace top gas temperature technological operation.
Background technology
[0002] blast furnace stopping falls in the stockline process; for the safety that guarantees coal gas system and protection furnace top equipment are not subjected to high temperature and damage; safety requirements and apparatus and process requirement according to blowing out; need less than 350 ℃ (guaranteeing that furnace top gas temperature can be controlled to less than 450 ℃ in the airtight box temperature is less than 60 ℃ situation during blowing out) without clock furnace roof blast furnace top gas temperature; common way is when the blowing out blowing down in advance; at 4 rifles of fetching water of the uniform installation of upper shaft circumferential direction; the water spray eye upwards; length of pipe is determined according to this absolute altitude type of furnace size; water spray is had hallucinations furnace wall 800mm to the outside, center 200mm; to prevent that water is sprayed onto on the furnace wall; the shutoff of water pistol front end, after terminate to the outer water source of stove, be drilled with the spout hole of 3 row φ 3mm～φ 5mm of 30 ° of angles at water pipe; shift to install between row and row; to improve the water spray homogeneity, the aperture outside is funnel-form with 8mm drill bit spot-facing, to improve the water spraying atomization effect; according to calculating what of water content consumption, determine the spacing of spout hole again.
The method cool principle is that water upwards forms water droplet with the wire ejection, drips under action of gravitation, contacts with the high-temperature coal air-flow that rises, and evaporation becomes the heat of vapor absorption coal gas, reaches the function that reduces gas temperature.This method atomizing effect of fetching water is poor, and water loss is large, and water and coal gas heat exchange rate are low, and furnace outage time is long, and the water droplet that easy formation is not evaporated in the water droplet dropping process is fallen the high temperature charge level, forms water---the scission reaction of coal gas chemical reaction and water, the C0 of generation, H
2And O
2Easily producer heads on fire and phenomenon of detonation; The water capacity is easily gathered at charge level, when collapsing material and collapse material, and the steam that instantaneous generation is a large amount of, generating steam explosion phenomenon in stove; Charge level has the slag iron-clad that condenses after the blowing out; Furnace bosh, bosh high heat load position be residual thick and heavy slag crust easily, and the method technique falls behind, and is not suitable for the blowing out of high pressure gas recovery method, and environmental pollution is serious, and economic benefit is low, poor stability.
Summary of the invention
In order to overcome the fetch water drawback of method of traditional furnace roof, the invention provides ejection atomization type Water spraying gun for lowering stock line of blast furnace, this device passes into ejection gas N
2, improved the atomizing effect of fetching water, diluted the H in the coal gas
2, improved the coal gas cooling-down effect, solved the safety problem of blast furnace stopping coal-gas recovering, significantly reduce coal gas diffusion, reclaim valuable coal gas, improve simultaneously environment, economic benefit is also considerable.
Technical scheme of the present invention:
A kind of Water spraying gun for lowering stock line of blast furnace, it comprises gun platform, barral of a gun, barral of a gun and gun platform link together, gun platform is pipe, an end that it is characterized in that gun platform is provided with joint flange, and an end of barral of a gun is provided with joint flange, water inlet pipe and nitrogen input aperture, the other end shutoff of barral of a gun;
Described barral of a gun consists of inner chamber, exocoel by inner tube, overcoat, and the nitrogen input aperture communicates with inner chamber, and the water-in of water inlet pipe communicates with exocoel;
Described barral of a gun is by establishing the spray orifice section and consisting of without the spray orifice section, if the spray orifice section is the inner tube at barral of a gun, put outward and all be drilled with 3 row's spray orifices, spray orifice dislocation between adjacent two rows, angle between first row spray orifice and the second row medullary ray is α, angle between second row spray orifice and the 3rd row's orifice center line is α, inner tube, the spray orifice that puts outward is coaxial, wherein the spray orifice aperture of inner tube is 3mm, the spray orifice that puts outward is that inwall mouth diameter is 5mm, outer wall mouth diameter is the funnel-shaped hole of 8mm, adding subdrilling in man-hour diameter is the hole of 5mm, then carry out spot-facing with diameter 8mm drill bit and process, make the hole be funnel shaped, be beneficial to the diffusion of water smoke;
The described spray orifice section of establishing is comprised of L1 section, L2 section, L3 section and L4 section successively, and wherein the L1 section is to establish 10% of spray orifice segment length, and the nozzle spacing of L1 section is 35mm, α=35 °; The L2 section is to establish 15% of spray orifice segment length, and the nozzle spacing of L2 section is 35mm, α=55 °; The L3 section is to establish 35% of spray orifice segment length, and the nozzle spacing of L3 section is 60mm, and α is 50 °; The L4 section is to establish 40% of spray orifice segment length, and the nozzle spacing of L4 section is 90mm, and α is 45 °.
Determine the Water spraying gun for lowering stock line of blast furnace installation site: Water spraying gun for lowering stock line of blast furnace is installed in the furnace roof level, and circumferential direction is uniform, fetches water direction down.According to furnace binding, can select to utilize cross temperature marksmanship orchid that the rifle base of fetching water is installed, or take to avoid the water cooler water pipe and hole at furnace shell, the rifle protective casing of then will fetching water is welded direct to the method on the furnace shell.
One side of base is excessive section of angle, and the rifle setting angle of will fetching water excessively arrives level attitude, is installed on the cross temperature marksmanship orchid or is welded in the furnace shell perforate by flange, and opposite side arranges flange, and rifle is connected with fetching water.
The present invention can be according to blast furnace throat diameter determine the to fetch water total length of rifle, comprises that the rifle of fetching water connects water source, gas source connector, insertion furnace shell and passes the length of furnace lining and the length of processing spout hole outside stove, and the rifle top of fetching water is from blast furnace medullary ray 150mm.
The present invention can be according to the water yield of furnace capacity and blowing out needs, model and the size of the rifle of determining to fetch water, and heat size cooperates specification such as following table.
Determine N
2Source of the gas, pressure 1.0MPa～1.3 MPa need arrange the reducing valve group when adopting high pressure nitrogen, and house steward's diameter is greater than DN50, and branch diameter DN25 is connected to the rifle N that fetches water
2Interface.
Determine high pressure water water source contact, pressure 1.3MPa～1.6 MPa, according to the rifle model of fetching water, house steward's diameter DN100～DN150, arm diameter DN50～DN80 is connected to the rifle water source interface of fetching water.
The furnace roof technical process of fetching water: because the blowing out operation of fetching water need to be carried out frequently water yield adjusting operation, shaft belongs to the hazardous location in the furnace shutting down process, there is safety problem, fetching water facility should be according to in-situ determination, be arranged on the following safety zone centralized Control of tuyere platform, namely make the water bag high pressure water is introduced, then draw arm from the water bag, by-pass valve control is installed, is connected to the furnace roof blowing out rifle of fetching water.High pressure water house steward and arm all arrange magnetic flow meter, and air exercise water system working order is monitored, and according to air quantity and throat temperature parameter, the water yield of air exercise water system is adjusted, and throat temperature is controlled at below 350 ℃, satisfies the safety of furnace top equipment.
The gun sprayer of fetching water when the present invention uses is downward, with high pressure, high flow rate N
2The method of injection, namely utilize the negative pressure that forms around the high flow rate gas, with water injection ejection in the gun hole, because pressure decreased after the gas ejection, current are impacted in volumetric expansion, water is broken into tiny water smoke, dissipation downwards, with the Gas Flow countercurrent flow of rising, carry out heat exchange, improved the effect of exchange rate and coal gas cooling, because the atomizing effect of water is good, the water smoke that is not evaporated enters upcast with Gas Flow and discharges out of the furnace, and does not have water and assembles drippage or have water to flow directly to charge level in the stove, reaches the purpose of safe blowing out.
The present invention is well to have improved the homogeneity of atomizing effect and the atomized water spray of water, furnace shutting down process stock gas H than the fetch water advantage of rifle of tradition
2Content is low, and the coal gas good cooling effect can suitably improve the blowing out air quantity, shortens furnace outage time, increases economic efficiency.
The water smoke of the present invention ejection does not directly contact high temperature charge level furnace lining, more can the bricking around charge level and cupola well not gather, and can protect cupola well high temperature carbon brick not to be flooded profit and causes oxidative attack and crackle, thereby prolong the cupola well life-span.
Description of drawings
Fig. 1 is the structure iron of gun platform in the embodiment of the invention.
Fig. 2 is the structure iron of Water spraying gun for lowering stock line of blast furnace in the embodiment of the invention.
Fig. 3 is the enlarged view of A section among Fig. 2.
Fig. 4 is the enlarged view of B section among Fig. 2.
Fig. 5 is the enlarged view of C section among Fig. 2.
Fig. 6 is the horizontal section enlarged view of Fig. 2.
Among the figure, 1, joint flange, 2, stiffening web (it is the blast furnace facility, does not belong to parts of the present invention), 3, blue (it is the blast furnace facility to the cross temperature marksmanship, do not belong to parts of the present invention), 4, gun platform, 5, (it is the blast furnace facility to blast furnace, do not belong to parts of the present invention), 6, nitrogen input aperture, 7, water-in, 8, joint flange, 9, nitrogen perforation, 10, atomized water spray hole, 11, a angle, 12, plugging plate, 13, rifle point, 14, barral of a gun, L0 be barral of a gun without the part of spray orifice, L is the part that barral of a gun is established spray orifice.
Embodiment:
Embodiment: Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, Water spraying gun for lowering stock line of blast furnace, it comprises gun platform 5, barral of a gun, and barral of a gun and gun platform link together, and gun platform is pipe, and an end of gun platform is provided with joint flange 1.
One end of barral of a gun is provided with joint flange 8, water inlet pipe and nitrogen input aperture 6, plugging plate 13 shutoff of the other end of barral of a gun, barral of a gun is by inner tube, overcoat consists of inner chamber, exocoel, nitrogen input aperture 6 communicates with inner chamber, the water-in 7 of water inlet pipe communicates with exocoel, be drilled with 3 denitrogen gas injection holes 9 on the inner tube of barral of a gun, put outward and be drilled with 3 draining spray painting perforations 10, atomized water spray hole 10 dislocation between adjacent two rows, nitrogen perforation 9 dislocation between adjacent two rows, nitrogen perforation 9 is coaxial with atomized water spray hole 10, and wherein the aperture of nitrogen perforation 9 is 3mm, atomized water spray hole 10 is funnel-shaped hole, and namely inwall mouth diameter is 5mm, outer wall mouth diameter is 8mm.
Fig. 2, Fig. 5, shown in Figure 6, L0 be barral of a gun without the part of spray orifice, L is the part that barral of a gun is established spray orifice, L1 partial-length=L * 10%, pitch of holes=35mm, angle α=35 °; L2 partial-length=L * 15%, pitch of holes=35mm, angle α=55 °; L3 partial-length=L * 35%, pitch of holes=60mm, angle α=50 °; L4 partial-length=L * 40%, pitch of holes=90mm, angle α=45 °, the rifle of fetching water of making by the method can make the distribution of water smoke on the furnace roof cross section more even, can guarantee that again water smoke is not sprayed onto on the furnace wall, at furnace shutting down process stock gas H
2Content is low, the coal gas good cooling effect.
Claims (1)
1. Water spraying gun for lowering stock line of blast furnace, it comprises gun platform, barral of a gun, barral of a gun and gun platform link together, gun platform is pipe, it is characterized in that an end of gun platform is provided with joint flange, and an end of barral of a gun is provided with joint flange, water inlet pipe and nitrogen input aperture, the other end shutoff of barral of a gun, barral of a gun consists of inner chamber, exocoel by inner tube, overcoat, and the nitrogen input aperture communicates with inner chamber, and the water-in of water inlet pipe communicates with exocoel; Described barral of a gun is by establishing the spray orifice section and consisting of without the spray orifice section, if the spray orifice section for the inner tube of barral of a gun, outside put and all be drilled with 3 row's spray orifices, spray orifice dislocation between adjacent two rows, angle between first row spray orifice and the second row medullary ray is α, angle between second row spray orifice and the 3rd row's orifice center line is α, inner tube, the spray orifice that puts outward are coaxial, and wherein the spray orifice aperture of inner tube is 3mm, and the spray orifice that puts outward is that inwall mouth diameter is that 5mm, outer wall mouth diameter are the funnel-shaped holes of 8mm; If the spray orifice section is comprised of L1 section, L2 section, L3 section and L4 section successively, wherein the L1 section is to establish 10% of spray orifice segment length, and the nozzle spacing of L1 section is 35mm, α=35 °; The L2 section is to establish 15% of spray orifice segment length, and the nozzle spacing of L2 section is 35mm, α=55 °; The L3 section is to establish 35% of spray orifice segment length, and the nozzle spacing of L3 section is 60mm, and α is 50 °; The L4 section is to establish 40% of spray orifice segment length, and the nozzle spacing of L4 section is 90mm, and α is 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110232517 CN102286649B (en) | 2011-08-15 | 2011-08-15 | Water spraying gun for lowering stock line of blast furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110232517 CN102286649B (en) | 2011-08-15 | 2011-08-15 | Water spraying gun for lowering stock line of blast furnace |
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| CN102286649A CN102286649A (en) | 2011-12-21 |
| CN102286649B true CN102286649B (en) | 2013-02-06 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103571990A (en) * | 2012-07-23 | 2014-02-12 | 宝山钢铁股份有限公司 | Water-fetching and temperature-decreasing device on top of blast furnace and control method thereof |
| CN103789473B (en) * | 2014-01-16 | 2018-11-02 | 新疆八一钢铁股份有限公司 | Blast furnace stopping dispensing device for water |
| CN111411186A (en) * | 2019-01-04 | 2020-07-14 | 新疆八一钢铁股份有限公司 | Ou ye stove shaft furnace roof atomizer |
| CN111996320A (en) * | 2020-09-01 | 2020-11-27 | 广东韶钢松山股份有限公司 | Spraying device for blast furnace burden-lowering surface furnace top and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201172665Y (en) * | 2008-04-18 | 2008-12-31 | 武汉摩林翰机电设备有限公司 | Water cooling device for furnace top of blast furnace |
| CN101338352B (en) * | 2008-07-28 | 2010-09-01 | 武汉钢铁(集团)公司 | Cleaning mechanism for viscous slag in inner wall of desulfuring spray gun of gasification chamber |
| CN201437688U (en) * | 2009-05-27 | 2010-04-14 | 中国建筑科学研究院 | Spray dust removal device for point detecting equipment |
| CN201512542U (en) * | 2009-08-26 | 2010-06-23 | 上海梅山钢铁股份有限公司 | Blast furnace roof water injection gun |
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