CN104006656A - Flame gunning nozzle for industrial furnace refractory lining - Google Patents
Flame gunning nozzle for industrial furnace refractory lining Download PDFInfo
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- CN104006656A CN104006656A CN201410069234.1A CN201410069234A CN104006656A CN 104006656 A CN104006656 A CN 104006656A CN 201410069234 A CN201410069234 A CN 201410069234A CN 104006656 A CN104006656 A CN 104006656A
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- refractory lining
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- industrial furnace
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Abstract
The invention relates to a flame gunning nozzle for an industrial furnace refractory lining and is a flame gunning device part used when flame gunning is performed on the industrial furnace and kiln refractory lining when the refractory lining is in the high-temperature state. The flame gunning nozzle comprises an inner bushing, an outer bushing, an inner spray tube seat, a red copper inner nozzle, nuts, an adjusting retaining plate, corundum sleeve bricks, an outer snapping sleeve, bolts, an embedded inner sleeve, spiral sheets and a supporting seat. Oxygen and fuel gas carrying fluidized solid micro granular gunning materials are conveyed to the nozzle from the outside. Before gunning, the nozzle enables oxygen and fuel gas to be pre-mixed rapidly and fully in the nonflammable condition, high-speed rotary flames are gunned instantly, the burning is rapid, the stability is good, the temperature is high, and rapid spread short flames can be formed. The refractory gunning material is at the nozzle outlet and is gunned in a high rotation spiral shape, the spreading area is large, and the flame gunning process requirement is met.
Description
Technical field
The present invention relates to industrial furnace, kiln refractory lining under the condition of high temperature, when it is carried out to flame gunning, and the visual plant parts of the flame gunning device using.
Background technology
Industrial furnace, kiln are in process of production, its refractory lining wall is subject to the high temperature erosion in burner hearth, thickness is attenuate gradually, or badly damaged cannot the continuation of local appearance used, when being close to the degree that can not maintain safety in production, now must stopping one period and produce, to remove out of use old refractory lining, again build new refractory lining by laying bricks or stones, meet next stage safety in production requirement.No matter the refractory material quality degree that the industrial furnace refractory lining of building by laying bricks or stones at present uses how, in process of production, effectively consumed and only accounted for fraction, and after all the other major parts are removed, the secondary refractory material extremely low as recycling rate cleans out, and causes the wasting of resources.Spray repair is to improve inner lining refractory utilization rate important channel, in fact the spray repair mode of the extensive dry method adopting of the refractory lining wall under normal temperature state, semidry method, wet method is very effective, but can not be applied to the spray repair of the refractory lining wall under the condition of high temperature, because these spray repair modes all cannot make gunning refractory adhere on the refractory lining wall under the condition of high temperature.During production gap, various different industrial furnace refractory lining temperature have high and low difference, and generally, between 800～1300 DEG C, in this temperature range, most refractory materials are in solid state.The high-temperature flame-proof inner liner wall that gunning refractory touches is now rigid collision, will rebound and fall, and sticky adhesive rate is extremely low, cannot make gunning refractory and refractory lining wall be sintered to one simultaneously, can not reach the effect of safeguarding furnace lining.Must make to need the refractory lining wall part of spray repair to continue to heat between 1500～1900 DEG C, in high temperature fused state, now spray repair is had to extremely strong adsorption capacity to its lip-deep gunning refractory, gunning refractory is high to the sticky adhesive rate of refractory lining, and form ceramic post sintering very soon and become one, maintenance or repairing industrial furnace refractory lining effect are splendid.
Industrial furnace refractory lining flame gunning device, can meet the spray repair of the refractory lining wall under the condition of high temperature preferably.Flame gunning device self can produce nearly 3000 DEG C of thermal-flames, will need the part of gunned lining wall spray repair place, continues to be heated to high temperature fused state, and the while is to the successively spray repair gun-mix refractory of inner liner wall surface of spray repair place.As easy as rolling off a log being adsorbed in the time that gunning refractory touches high temperature fused state inner liner wall, and be mounted to the inside, and is sintered into one, makes the thickening that is restored of the refractory lining wall of attenuate, also can make part have badly damaged inner liner wall to be repaired.Thereby make refractory lining can continue to use, extend its life-span, reduce refractory material use amount.Reduce industrial furnace, kiln maintenance, repair cost, improve its production operational availability.Flame gunning device is by the nozzle of its parts flame gunning, by oxygen and combustion gas mixing ejection, and the thermal-flame that aloft burning produces rapidly, the solid, powdery gunning refractory being simultaneously fluidized sprays with fuel gas high-speed, spray repair refractory lining wall surface.By manipulation flame gunning device, can make flame gunning nozzle in local space, move freely or rotate, in the situation that industrial furnace is completely motionless, change the position of its refractory lining wall of spray repair.
Summary of the invention
Industrial furnace refractory lining flame gunning nozzle of the present invention is the vitals of flame gunning device, its principal character: nozzle by clad steel collar supports, and nozzle and flame gunning apparatus system are linked into an integrated entity.The oxygen being provided by flame gunning apparatus system with carry the combustion gas that is fluidized solid, powdery gunning refractory, be delivered to respectively in nozzle by clad steel sleeve pipe equally, oxygen is at the skin of clad steel sleeve pipe, combustion gas is at internal layer.Nozzle makes oxygen that high pressure, low speed are transported to be transformed into normal pressure therein, rotate form at a high speed, by force.Oxygen and the combustion gas of High Rotation Speed merge into one in nozzle interior, before nozzle ejection, completely not under combustion case, can carry out fast, premixed fully.Having carried out well-mixed oxygen and combustion gas sprays at nozzle exit, present equally strong rotation form, because the refractory lining wall of spray repair place closely stops, can produce burning rapidly, good stability, temperature be high, occur warp state, the short flame of fast spread formula.The short flame of this ultrahigh-temperature effectively reduces space heat elimination towards periphery, makes the refractory lining wall heating surface (area) (HS of spray repair place increase simultaneously, and quick heating, and the thermal efficiency is high.Gunning refractory presents strong rotary spiral shape ejection equally at nozzle exit, obtains rapidly, scatters uniformly, does not produce accumulation on contact inner liner wall surface, and the area that scatters is wide, matches with flame gunning technological requirement.
Nozzle-integrated high-temperature resistance extra-heavy, is in when nozzle operation in the hot environment in industrial furnace burner hearth, and the thermal-flame of exit burning is being close to nozzle, and flame runs into institute's gunned lining wall prevention simultaneously, and the warp flame part causing will be surrounded nozzle.In nozzle, rear utilizes its inner high speed air-flow to carry out from cooling, the high temperature resistant sleeve brick that front end adopts the corundum material of high-temperature resistance extra-heavy to make, meets job requirement.Nozzle coordinates with the pneumatic control system of flame gunning device, make to be transported to nozzle oxygen before and keep stable high pressure, low flow rate regime, thereby make the steel pipe of delivering oxygen, oxygen flow, the guarantee oxygen using of satisfying the demand is carried under permissible velocity prerequisite in steel pipe, reduces its caliber and appearance and size.Under the state remaining unchanged at delivering oxygen pressure, nozzle can change the oxygen flow of ejection by trace, thereby within oxygen flow being adjusted to be conducive to flame gunning optimum range.Oxygen and combustion gas are at the axial flow velocity of nozzle interior mixed airflow, adjust to 8～10 times of its flame combustion speed, effectively prevent from producing in nozzle interior on the one hand the dangerous phenomenon of burning or tempering, this burning or tempering harm are very serious, can make the high temperature resistant sleeve brick part internal layer of corundum, be heated to very soon high temperature fused state, cause constantly very easily adhering to its inner surface through gun-mix refractory herein, and form the passage of piling up the ejection of obstruction mixed airflow.The mixed airflow of ejection at a high speed on the other hand, can prevent that gunning refractory from striking needs the refractory lining of spray repair wall surface, and bounce-back is fallen and sticks to nozzle exit, stopped nozzles.When work, by mobile or swivel nozzle, change the position of spray repair refractory lining wall, regulate jet expansion to the distance between inner liner wall, and pay close attention at any time and adjust pressure, the flow etc. of oxygen, combustion gas, make flame gunning all the time in optimum state.
When flame gunning nozzle operation, the flame intensity of ejection is high, makes to need the refractory lining wall of spray repair and the gunning refractory heat temperature raising efficiency of ejection high.Nozzle-integrated can be in≤1200 DEG C of industrial furnace high-temperature burner hearth environment long-time normal work, nozzle and clad steel sleeve pipe mainly rely on the mobile air-flow of its inner high speed and carry out coolingly, resist outside high temperature equipment component is damaged.Quit work in flame gunning system, when inside does not have air-flow to pass through, nozzle must be shifted out to high-temperature burner hearth as early as possible, be placed in the space under normal temperature state.In the course of the work; may be because of equipment fault or human operational error; make jet expansion to refractory lining span from close to too or be close together, cause spraying and being obstructed after oxygen and combustion gas mixing, and while producing tempering; jet element is high temperature resistant corundum sleeve brick is because interior pressure increases; there is brittle fracture in middle weak part moment, its end Automatic-falling ensures that mist ejection is unimpeded; stop the generation of substantial equipment accident, nozzle has very strong automatic safe protective function.Nozzle operation environment is severe, outside next-door neighbour's ultrahigh-temperature flame, there are high speed oxygen air-flow and swiftly flowing graininess gun-mix refractory, intense impact, wearing and tearing and erosion to the inside and outside wall of conveyance conduit in inside, can produce some easily worn parts, as the inner nozzle of the high temperature resistant sleeve brick of corundum, red copper matter.In order to make nozzle-integratedly to synchronize service life with the parts of other flame gunning device, must often change the easily worn part of nozzle.The demolition, installation of this nozzle are convenient, meet the requirement of quick-replaceable easily worn part.
Brief description of the drawings
Fig. 1 is that industrial furnace refractory lining flame gunning nozzle master of the present invention looks generalized section;
Fig. 2 is that industrial furnace refractory lining flame gunning nozzle B of the present invention is to view;
Fig. 3 is Oxygen Flow Principle of Rotating A-A cutaway view of the present invention.
In figure:
1, inner sleeve 2, outer tube 3, inner nozzle seat 4, red copper inner nozzle 5, nut 6, controllable register 7, corundum sleeve brick 8, outer cutting ferrule 9, bolt 10, embedded inner sleeve 11, flight 12, supporting seat.
Detailed description of the invention
The present invention is further described in conjunction with the accompanying drawings and embodiments:
As shown in Figure 1,3, the bilayer sleeve that industrial furnace refractory lining flame gunning nozzle consists of inner sleeve 1 and outer tube 2, is connected with flame gunning apparatus main body, and support nozzle.The oxygen being provided by flame gunning apparatus main body and carry the combustion gas that is fluidized solid granule shape gun-mix refractory, is delivered to nozzle by the inside and outside layer of bilayer sleeve respectively, and combustion gas is at internal layer, and oxygen is at skin.Carry the combustion gas that is fluidized solid granule shape gun-mix refractory by inner sleeve 1 internal layer, spray through red copper inner nozzle 4 again by inner nozzle seat 3, enter the mixed zone of corundum sleeve brick 7 interior hole paths.There is the passage that skin that the oxygen of constant pressure is connected with inner nozzle seat 3 by inner sleeve 1 and outer tube 2 internal layers form, enter the narrow screw type multiple arranged side by side air channel being formed by red copper inner nozzle 4, embedded inner sleeve 10 and flight 11.Because of the back pressure that multiple narrow screw types arranged side by side air channel produces, change at the oxygen of flight 11 both sides the low-pressure state that is bordering on normal pressure into from high pressure.Be that oxygen is carried by high pressure, axial low speed, transfer low pressure, the ejection of High Rotation Speed helical form to, enter equally the mixed zone of corundum sleeve brick 7 interior hole paths.In mixed zone, sufficient premixed is carried out in the Oxygen Flow of High Rotation Speed and combustion gas, also makes mixed airflow and solid granule shape gun-mix refractory simultaneously, in corundum sleeve brick 7, is the ejection of High Rotation Speed helical form.By changing the size of controllable register 6 internal orifice dimensions, keeping, delivering oxygen pressure substantially constant is constant, thereby it is how many to change the oxygen flow spraying.Make the mixed airflow axial flow velocity in the mixed zone of corundum sleeve brick 7 internal channels, be controlled at 8～10 times of its flame combustion speed.The mixed zone axial distance of corundum sleeve brick 7 interior hole paths is 4～6 times of internal aperture, and to ensure that oxygen and combustion gas are not producing under combustion case, elementary mixing is even.Mixed air-flow and gun-mix refractory, from the interior ejection of corundum sleeve brick 7, present spiral scattering at once.Because the refractory lining wall of spray repair place closely stops, can produce burning rapidly, good stability, temperature be high, occur warp state, the short flame of fast spread formula, adds the hot gunning district refractory lining wall thermal efficiency high.Gun-mix refractory presents strong spiral fallaway type equally, and from the interior ejection of corundum sleeve brick 7, the area that scatters that is sprayed onto refractory lining wall surface is large, meets the requirement of industrial furnace, kiln refractory lining flame gunning technique.
As shown in Figure 1, 2, 3, supporting seat 12 is rigidly connected with outer tube 2, and inner nozzle seat 3 is rigidly connected with inner sleeve 1.The active force elimination, moving nozzle and the swivel nozzle that when nozzle operation, produce, be all the bilayer sleeve consisting of inner sleeve 1 and outer tube 2, cooperated by the miscellaneous equipment of flame gunning device.Embedded inner sleeve 10 is embedded in the endoporus of supporting seat 12 with friction tight form.The supported seat 12 of controllable register 6 and corundum sleeve brick 7 clamping and positioning.The male cone (strobilus masculinus) of corundum sleeve brick 7 is blocked by the internal taper hole of outer cutting ferrule 8, and outer cutting ferrule 8 is connected as a single entity with supporting seat 12 by bolt 9 and nut 5.Demolition, installation bolt 9, nut 5 make nozzle-integrated disintegration or assembling, are convenient for changing consumable accessory and adjustment part wherein, as red copper inner nozzle 4, flight 11, corundum sleeve brick 7, controllable register 6 parts and components.The inner side of flight 11 is connected with the outer surface of red copper inner nozzle 4, the endoporus of the outside of flight 11 and embedded inner sleeve 10, and one-tenth can disengaged gapless coordinate.During due to flame gunning nozzle operation, the two ends oxygen pressure of flight 11 is poor larger, and the oxygen gas flow rate in spiral duct is very high.Touching high flow rate oxygen parts, making as embedded inner sleeve 10, red copper inner nozzle 4, flight 11, controllable register 6 all adopt the metal material red copper of antioxygen property the best.Red copper inner nozzle 4 outer surfaces have high speed oxygen gas shock and erosion, and there is swiftly flowing graininess gun-mix refractory inside, and to wall HID wearing and tearing, life cycle is shorter than other parts and components, belong to consumable accessory needs and often change.Red copper inner nozzle 4 is thread connection with the inner nozzle seat 3 of steel, facilitates its regular demolition, installation to change.Owing to working in DEG C hot environment space, nozzle-integrated being in≤1200, its red copper matter parts and components high-temperature resistance is poor, does not directly contact with hot environment.Hyperthermia radiation red copper matter parts and components damage capability is limited, and the simultaneously high velocity air of inner normal temperature state carries out effectively coolingly to it, resist the damage of high temperature to parts and components.For high velocity air cooling benefit less than or poor effect, directly contact and is subject to the parts and components of hyperthermia radiation with hot environment space, the heat-resistance stainless steel material making that employing high temperature resistant property is good, as outer cutting ferrule 8, bolt 9, nut 5, supporting seat 12.Nozzle-integrated can work for a long time in≤1200 DEG C of hot environment spaces, flame gunning system quits work, and when inside does not have air-flow to pass through, all parts and components is not had to cooling capacity, nozzle must be shifted out to high-temperature burner hearth as early as possible, be placed in the space under normal temperature state.The thermal-flame of corundum sleeve brick 7 next-door neighbour's burnings, also be stopped by refractory lining wall and produce the most serious parts of warp flame high temperature erosion, endoporus has the Oxygen Flow of High Rotation Speed and is fluidized solid granule shape gun-mix refractory to its inwall impact, wearing and tearing, adopt corundum refractory material to make, there are high temperature resistance, anti-oxidant, the good nonmetallic materials of abrasion resistance properties simultaneously.Utilize the feature that corundum Material Strength is low, fragility is large, leave weak part in corundum sleeve brick 7 middles.When jet expansion is to refractory lining span from close to too or be close together; cause spraying and being obstructed after oxygen and combustion gas mixing; and produce when tempering; because corundum sleeve brick 7 internal pressures increase, there is brittle fracture in middle weak part moment, its end Automatic-falling; ensure that mist ejection is unimpeded; effectively other parts and components of protection flame gunning device, the generation of stopping substantial equipment accident, nozzle has very strong automatic safe protective function.
Claims (9)
1. industrial furnace refractory lining flame gunning nozzle, is characterized in that it comprises inner sleeve (1), outer tube (2), inner nozzle seat (3), red copper inner nozzle (4), nut (5), controllable register (6), corundum sleeve brick (7), outer cutting ferrule (8), bolt (9), embedded inner sleeve (10), flight (11), supporting seat (12);
The bilayer sleeve of described inner sleeve (1) and outer tube (2) composition, is connected with flame gunning apparatus main body, and support nozzle; Carry the combustion gas that is fluidized solid granule shape gun-mix refractory by inner sleeve (1) internal layer, pass through again red copper inner nozzle (4) ejection by inner nozzle seat (3), enter the mixed zone of the interior hole path of corundum sleeve brick (7); The passage that the skin that oxygen is connected with inner nozzle seat (3) by inner sleeve (1) and outer tube (2) internal layer form, enter the narrow screw type multiple arranged side by side air channel being formed by red copper inner nozzle (4), controllable register (6), embedded inner sleeve (10) and flight (11), High Rotation Speed helical form sprays, and enters equally the mixed zone of the interior hole path of corundum sleeve brick (7); Sufficient premixed is carried out in the Oxygen Flow of High Rotation Speed and combustion gas, in corundum sleeve brick (7), is the ejection of High Rotation Speed helical form; Embedded inner sleeve (10) is embedded in friction tight form in the endoporus of supporting seat (12); The supported seat of controllable register (6) (12) and corundum sleeve brick (7) clamping and positioning; The male cone (strobilus masculinus) of corundum sleeve brick (7) is blocked by the internal taper hole of outer cutting ferrule (8), and outer cutting ferrule (8) is connected as a single entity with supporting seat (12) by bolt (9) and nut (5).
2. industrial furnace refractory lining flame gunning nozzle according to claim 1, it is characterized in that: described embedded inner sleeve (10), red copper inner nozzle (4), flight (11) and controllable register (6) parts, the narrow screw type multiple arranged side by side air channel of composition, oxygen flow velocity in air channel is high, all adopts the splendid metal material red copper of antioxygen property to make.
3. industrial furnace refractory lining flame gunning nozzle according to claim 1, is characterized in that: described corundum sleeve brick (7) adopts corundum refractory material to make, and has high temperature resistance, anti-oxidant, the good nonmetallic materials of abrasion resistance properties simultaneously; Utilize the feature that corundum Material Strength is low, fragility is large, leave weak part in corundum sleeve brick (7) middle; When jet expansion is to refractory lining span from close to too or be close together, cause spraying and being obstructed after oxygen and combustion gas mixing, and produce when tempering, corundum sleeve brick (7) internal pressure increases, there is brittle fracture in middle weak part moment, its end Automatic-falling, ensures that mist ejection is unimpeded; Be that nozzle has very strong automatic safe protective function.
4. industrial furnace refractory lining flame gunning nozzle according to claim 1, is characterized in that: describedly nozzle-integratedly in local space, move freely or rotate, in the situation that industrial furnace is completely motionless, changing the position of nozzle spray repair refractory lining wall.
5. according to the industrial furnace refractory lining flame gunning nozzle described in claim 1,2, it is characterized in that: described by red copper inner nozzle (4), controllable register (6), embedded inner sleeve (10) and flight (11), the narrow screw type multiple arranged side by side air channel of composition produces back pressure, make to be transported to nozzle oxygen before and keep stable high pressure, low flow rate regime, by changing the size of controllable register (6) internal orifice dimension, keeping, delivering oxygen pressure substantially constant is constant, thereby it is how many to change the oxygen flow spraying.
6. according to the industrial furnace refractory lining flame gunning nozzle described in claim 1,2,5, it is characterized in that: described red copper inner nozzle (4) is thread connection with steel inner nozzle seat (3), facilitate the regular demolition, installation of red copper inner nozzle (4) to change.
7. according to the industrial furnace refractory lining flame gunning nozzle described in claim 1,2,5, it is characterized in that: described flame gunning nozzle can make gunning refractory, present strong rotary spiral shape ejection at nozzle exit, obtain rapidly, scatter uniformly, do not produce accumulation at contact industrial furnace refractory lining wall surface, the area that scatters is wide, matches with flame gunning technological requirement.
8. according to the industrial furnace refractory lining flame gunning nozzle described in claim 1,4, it is characterized in that: described setting in dedicated cooling system situation, nozzle-integrated can repeated multiple timesly normally work for a long time in≤1200 DEG C of industrial furnace high-temperature burner hearth environment, nozzle and clad steel sleeve pipe mainly rely on the swiftly flowing air-flow of its delivered inside and carry out coolingly, resist outside high temperature equipment component is damaged; Quit work in flame gunning system, when inside does not have air-flow to pass through, nozzle can shift out high-temperature burner hearth, is placed in the space under normal temperature state.
9. according to the industrial furnace refractory lining flame gunning nozzle described in claim 1,2,5, it is characterized in that: the air-flow after described oxygen and combustion gas mixing sprays in corundum sleeve brick (7), at once presents spiral scattering; Because the refractory lining wall of spray repair place closely stops, can produce burning rapidly, good stability, temperature be high, occur warp state, the short flame of fast spread formula, adds the hot gunning district refractory lining wall thermal efficiency high.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410069234.1A CN104006656A (en) | 2014-02-24 | 2014-02-24 | Flame gunning nozzle for industrial furnace refractory lining |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410069234.1A CN104006656A (en) | 2014-02-24 | 2014-02-24 | Flame gunning nozzle for industrial furnace refractory lining |
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| CN104006656A true CN104006656A (en) | 2014-08-27 |
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| CN201410069234.1A Pending CN104006656A (en) | 2014-02-24 | 2014-02-24 | Flame gunning nozzle for industrial furnace refractory lining |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022062848A1 (en) * | 2020-09-28 | 2022-03-31 | 重庆海尔滚筒洗衣机有限公司 | Gas injection nozzle assembly and gas heating device using same |
| CN114310686A (en) * | 2020-09-30 | 2022-04-12 | 中国石油天然气股份有限公司 | Nozzle and manufacturing method thereof |
| CN116390898A (en) * | 2020-10-08 | 2023-07-04 | 瓦格斯塔夫公司 | Refractory nozzle |
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| CN102607275A (en) * | 2012-03-27 | 2012-07-25 | 王世松 | Flame gunning type nozzle |
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Patent Citations (5)
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| CN2534475Y (en) * | 2002-04-12 | 2003-02-05 | 姜政华 | High-efficiency water slurry burner |
| JP2005265289A (en) * | 2004-03-18 | 2005-09-29 | Koki Kyo | Structure of gas outlet valve able to make release |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022062848A1 (en) * | 2020-09-28 | 2022-03-31 | 重庆海尔滚筒洗衣机有限公司 | Gas injection nozzle assembly and gas heating device using same |
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| CN116390898A (en) * | 2020-10-08 | 2023-07-04 | 瓦格斯塔夫公司 | Refractory nozzle |
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Application publication date: 20140827 |