CN103710034A - Thermal state replacement and maintenance method for heat recovery coke oven gas collector - Google Patents
Thermal state replacement and maintenance method for heat recovery coke oven gas collector Download PDFInfo
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- CN103710034A CN103710034A CN201410000934.5A CN201410000934A CN103710034A CN 103710034 A CN103710034 A CN 103710034A CN 201410000934 A CN201410000934 A CN 201410000934A CN 103710034 A CN103710034 A CN 103710034A
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Abstract
The invention discloses a replacement and maintenance method comprising the following steps: blocking off and pressing a furnace: closing connecting passage openings between a furnace top ascension tube and elbows of a maintenance-side coke oven and/or maintenance-side gas collector near-end flashboards; pipe wall opening: respectively forming a construction hole and a convection hole on the maintenance-side gas collector; heat dissipation and ventilation: dissipating and discharging high-temperature gas in the gas collector; blocking off a water gate: blocking off the side face of the gas collector near-end flashboard; dismantling a thermal insulating layer; blocking off elbow orifices; constructing a thermal insulating layer; sealing hole for the first time; dismantling blockage; dismantling blockage on the side faces of the gas collector near-end flashboards as well as blockage on the connecting passage openings between the various elbows and the gas collector; sealing hole for the second time; opening various flashboards: sequentially opening the flashboards when opening ascension tube flashboard; repairing a steel shell; and implementing site clearance. The maintenance method disclosed by the invention realizes on-line thermal state maintenance of the coke furnace, and has the advantages of low maintenance cost and short construction period; and the maintenance method is widely applicable to thermal state maintenance of gas collection main and branch pipes of the heat recovery coke furnace.
Description
Technical field
The invention belongs to maintenance of coke oven technical field, relate in particular to a kind of hot method for maintaining of gas collecting pipe for thermal recovery coke oven liner thermofin.
Background technology
Heat recovery coke oven is a kind of pit kiln that has protection of the environment, makes full use of the comprehensive advantages such as resource.It is the reasonably fully burning in pit kiln inside by the raw gas producing in pit kiln process and some objectionable impuritiess, recycles high-temp waste gas heat and generates electricity or other resource utilization purposes.Heat recovery coke oven coking chamber adopts negative-pressure operation, and outer smoke evacuation dirt, not have pollution substantially to ecotope, and heat energy can be fully utilized, and obtains paying close attention to more and more widely and applying.
Clean type heat recovery coke oven mainly comprises the compositions such as coking chamber, burning flue, upcast (rising quirk), downtake (decline quirk), blast inlet and secondary air inlet.Downtake is only connected with coking chamber and burning flue, and the upcast mouth of pipe is connected with effuser by bridge tube.Consideration for production smoothing and the constant discharge of combustion gases, heat recovery coke oven is not that single coking chamber is self-existent, and several coking chambers and coke oven body are combined and connected into one compared with big unit " fire grate ", pusher side and coke side at each " fire grate " top are provided with two effusers abreast, and this effuser connects to gas gathering manifold again.Some upcasts of each coking chamber are connected with the effuser of the same side by corresponding with it pusher side bridge tube or coke side bridge tube respectively.The inflammable gas of heat recovery coke oven carries out secondary combustion in body of heater, is once on coking chamber top, and another time is by decline quirk, to be delivered to burning flue to burn, and the heat that this twice combustion produces offers the desired heat of briquette coking.The high-temp waste gas that burning produces and superfluous combustion gases enter into through upcast and bridge tube the effuser that comprises gas-collecting branch pipe and gas gathering manifold again, and high-temp waste gas is delivered to waste heat boiler and produced steam-electric power the most at last.Higher owing to entering into the combustion exhaust temperature of effuser, in addition superfluous inflammable gas also burns for the third time in effuser, in effuser pipe, high-temp waste gas temperature can reach 1300 ℃, and in waste gas, contain harmful etchant gases such as water vapor, SO2, CO, effuser liner thermofin not only stands the high temperature thermal shocking of heat wave air-flow, and bear the Eroded of obnoxious flavour, so the damage that comes off of effuser liner thermofin, it is inevitable even caving in.After effuser liner thermofin damages or collapses, heat well damage not only, waste heat can not get fully effectively utilizing, and effuser steel casing loses the protection of thermofin, and the oxidation of aggravation box hat, even causes melting scaling loss, causes major safety risks.
Maintenance scaling loss effuser is all that the method for taking coke oven to stop production repairs or replaces it at present, there is many deficiencies in this cold conditions method for maintaining: first coke oven body especially coking chamber liner insulating refractory structure be that silica brick is built by laying bricks or stones and formed, after the cooling chance freezing air contact of silica brick blowing out, be prone to a large amount of shrinkage crackings, even come off and cave in, when serious, can cause whole body of heater to scrap.Moreover thimble-tube boiler is being connected numerous coking chambers and body of heater by gas gathering manifold with some gas-collecting branch pipes, after part coking chamber stops production, the waste heat amount of input thimble-tube boiler must reduce, the inhomogeneous fluctuation that forms boiler residual heat is supplied with, and this directly affects again the turbine of downstream driving and optimum operation and the up-time efficiency of drive unit.Also have in existing method for maintaining is again to make on the ground new effuser steel casing, and build liner thermofin within it by laying bricks or stones, with new effuser, replace old pipe again, intact lagging material in former effuser steel casing material and effuser all goes out of use need not, cause waste, more seriously so huge heavy effuser handling replacement quantities is very large, maintenance cost is also very large, and effuser liner insulating brick easily causes loosening dislocation in hoisting process, affect the globality of inner lining structure, the lighter affects the heat insulating effect of the new pipe of gas collection, severe one need be keeped in repair arrangement again.
Summary of the invention
For the existing above-mentioned deficiency of prior art, technical problem to be solved by this invention is to provide a kind of hot repair and replacement method of gas collecting pipe for thermal recovery coke oven, and it not only can realize the coke oven hot maintenance that do not stop production, and maintenance cost is low, short construction period.
In order to solve the problems of the technologies described above, repair and replacement method of the present invention comprises the following steps:
(1), shutoff presses stove: close connecting passage mouth and/or maintenance side effuser near-end flashboard between maintenance side oven top of coke oven upcast and bridge tube, between blocking-up maintenance side upcast and bridge tube, be connected quirk, make coke oven in banking state;
(2), tube wall perforate: at least respectively open construction hole and a convection holes on maintenance side effuser, construction hole and convection holes penetrate effuser steel casing and thermofin;
(3), heat radiation ventilation: distribute and discharge high-temperature gas in effuser pipe, make temperature in effuser pipe be down to working temperature;
(4), shutoff sluice gate: workmen enters in effuser pipe, and shutoff effuser near-end flashboard side makes the sealing of effuser proximal port;
(5), remove thermofin: workmen enters in pipe from construction hole or convection holes, removes the thermofin damaging in pipe, and cleaning is removed on-the-spot;
(6), shutoff bridge tube mouth: each bridge tube and effuser connecting passage mouth on shutoff effuser, make this connecting passage mouth sealing;
(7), build thermofin by laying bricks or stones: in effuser pipe, remove thermofin place and build the new thermofin of laying by laying bricks or stones;
(8) a, sealing of hole: all convection holes on sealing maintenance side effuser, and an at least reserved construction hole and seal remaining hole of respectively constructing on maintenance side effuser;
(9), remove shutoff: remove the side shutoff of effuser near-end flashboard and each bridge tube and the shutoff of effuser connecting passage mouth;
(10), secondary hole sealing: the two construction holes at last head and the tail two ends on sealing maintenance effuser;
(11), open each flashboard: when opening upcast flashboard, should sequentially carry out, at each bridge tube place, first open the wherein a connection channel mouth between upcast and bridge tube, after 8-36 hour, open again all the other all upcasts and the connecting passage mouth between bridge tube;
, repair box hat: through try out normal after, the steel casing at construct on repair by welding effuser hole and convection holes place;
(13), on-the-spot cleaning: cleaning maintenance sites, completes effuser maintenance.
Closing between maintenance side oven top of coke oven upcast and bridge tube in connecting passage mouth, close maintenance side effuser near-end flashboard.
Corresponding construction hole or the convection holes of each coking chamber, this construction hole and convection holes are alternately corresponding to adjacent coking chamber, and convection holes height is higher than construction hole height.
With pressure mode or natural way, to the ventilation of dispelling the heat in effuser pipe, make temperature in the pipe after heat radiation ventilation be down to 25 ℃-35 ℃.
Described shutoff sluice gate is, in effuser near-end flashboard side, refractory ceramic fibre heap is built into shutoff wall.
Described shutoff bridge tube mouth is to take refractory ceramic fibre as each bridge tube of sealer shutoff and effuser connecting passage.
A described sealing of hole and secondary hole sealing are by building thermofin by laying bricks or stones and closure construction hole and convection holes in construction hole and convection holes place.
The cross section structure of described effuser comprises that box hat and the insulating brick that is positioned at box hat inwall build layer by laying bricks or stones.
The cross section structure of described effuser is outside in followed successively by box hat, back boxing thermofin and the hot thermofin of face.
After building thermofin by laying bricks or stones, check the thermofin gap of newly building by laying bricks or stones, and add and be coated with high temperature clay on new thermofin surface.
The present invention compared with prior art has following remarkable advantage:
1, the present invention only needs banking to push up the effuser of a side (pusher side or coke side) when maintenance, high-temperature gas still can be passed through from opposite side effuser, coke furnace carbonization chamber is in running order all the time, at maintenance one side effuser and after it is normally worked, can start the maintenance of opposite side effuser again, this alternately method for maintaining has been realized the hot repair and replacement that do not stop quenching stove, has guaranteed that the serialization running of coke oven is produced, both the safety that had guaranteed maintenance is carried out, and has stablized again the production efficiency of coke oven.
2, the present invention is in the maintenance process of effuser, on the one hand because coking chamber and coke oven body all do not stop producing, furnace wall body, all the time in the hot state of high-temperature constant, has been avoided the generation of the body of heater suddenly cold and hot in cooling the maintenance shrinkage cracking causing and the body of heater damage phenomenons such as caving in that comes off completely.On the other hand because coking chamber does not stop production, the high-temperature gas of its generation is still delivered to thimble-tube boiler by opposite side effuser, coke oven is still equably to boiler heat supplying, thereby guaranteed the turbine of boiler driving and the normal operation of drive unit, greatly reduced the failure rate of turbine, drive unit and generating set.
3, integral demounting effuser box hat not in method for maintaining of the present invention, the replacing of thermal insulation layer is still carried out in former box hat, and effuser liner insulating layer structure can be because of lifting loose shift.Owing to still having retained original effuser box hat, the two ends of maintenance effuser were not cut and were taken apart, so effuser two ends still keep tight sealing property yet.
4, the present invention has also greatly reduced box hat maintenance material, maintenance construction facilitates, has saved construction cost, has reduced the twists and turns on construction link, greatly shorten the maintenance construction duration, so the present invention not only greatly reduces maintenance cost, and there is longer work-ing life.
5, the present invention is not also owing to needing handling and the high-altitude of carrying out effuser to install, and workmen is all constructions in pipe almost, and construction safety coefficient is high, thereby guaranteed maintenance and the safety of producing.
Accompanying drawing explanation
Concrete structure below in conjunction with accompanying drawing effuser is described in further detail the present invention.
Position of opening schematic diagram when Fig. 1 is the hot maintenance of a kind of gas collecting pipe for thermal recovery coke oven;
Fig. 2 is a kind of concrete gas collecting pipe for thermal recovery coke oven cross-sectional structure schematic diagram;
Fig. 3 is another kind of concrete gas collecting pipe for thermal recovery coke oven cross-sectional structure schematic diagram.
Embodiment
Gas collecting pipe for thermal recovery coke oven as shown in Figure 1, this effuser 1 is fixedly installed on by some coke oven bodies and combines on the furnace roof of " fire grate ", below this effuser 1 along its length to there being several coking chambers, the upcast of each coking chamber is communicated in the below (not shown upcast and bridge tube) of effuser by bridge tube.Pusher side and coke side at " fire grate " furnace roof are provided with respectively two effusers 1 abreast, and same coking chamber is communicated on pusher side effuser and coke side effuser by pusher side bridge tube and coke side bridge tube correspondence respectively.Owing to considering the harmony of high temperature gas flow flow velocity in effuser, effuser distal diameter should be less than or equal to effuser proximal diameter, thereby the effuser shown in Fig. 1 is divided into cylinder pipeline section and circular cone pipeline section along its length.The effuser that keeps in repair side during maintenance construction has a construction hole 3 and convection holes 2 on the pipeline section of effuser 1 corresponding to each coking chamber, and construction hole 3 and convection holes 2 are positioned on effuser along the length direction of effuser 1 with staggering, the effuser pipeline section the preceding paragraph that is adjacent two coking chambers has construction hole, adjacent one section is convection holes, and convection holes 2 is positioned at the tip position of effuser 1, construction hole 3 is positioned at the lateral location of effuser 1, the height location that makes convection holes is always higher than the height in construction hole, this arrangement and method for construction has facilitated the turnover of workmen and material, and be positioned at high-order convection holes, be beneficial to high-temperature gas ascension and arrange outward, and make gas in maintenance pipe can produce axial flow, producing again warp-wise flows, thereby accelerate the heat radiation ventilation of maintenance effuser.During maintenance construction, in effuser box hat 4 corresponding positions, cut open corresponding hole and remove the back boxing thermofin of correspondence position, thereby form construction hole 3 and convection holes 2.Construction hole 3 and convection holes 2 do not need to limit fixing hole shape, as long as facilitate the turnover of personnel's material and gaseous emission.The profile of effuser 1 is also not limited to structure shown in Fig. 1, can also be whole and take conical tube structure, or whole adopts cylindrical tube structure.The effuser contour structures that they are different, does not all affect application and the enforcement of method for maintaining of the present invention.
A kind of gas collecting pipe for thermal recovery coke oven cross section concrete structure schematic diagram as shown in Figure 2.This effuser comprises box hat 4, builds by laying bricks or stones and be equipped with back boxing thermofin 5 and the hot thermofin 6 of face in box hat 4, and its cross section structure is followed successively by the hot thermofin 6 of box hat 4, back boxing thermofin 5 and face from outside to inside.The hot thermofin 6 of face is positioned at the innermost layer of effuser, and it directly contacts with high temperature gas flow, and the hot thermofin 6 of face is all 1.0-1.5g/cm by density
3anti-erosion mullite vitrified brick along circumferential whole circle arch, build and form, adjacent anti-erosion mullite vitrified brick build convex tendon and the groove that is provided with mutual joggle in plane by laying bricks or stones, this structure not only makes to mesh closely between brick body, strong in conjunction with connection power, and mutually joggle has been blocked again high temperature gas flow and is ganged up and distribute and the erosion to box hat, has high defeated thermo-efficiency.Between box hat 4 and the hot thermofin 6 of face, be equipped with back boxing thermofin 5, this back boxing thermofin 5 is along circumferentially adopting the composite structure of segmentation.Within the scope of 210 ° of lower half circle, first be on box hat 4 internal surfaces, to lay the ceramic fiber blanket 53 that one deck 10mm is thick, on ceramic fiber blanket 53, the calcium silicate board with microporous 54 that two layers of thickness is 40mm is laid in compartment of terrain, and between adjacent calcium silicate board with microporous 54,0.5-0.6g/cm is laid at interval
3mullite heat insulation support brick 52, to strengthen intensity and the supporting capacity of back boxing thermofin 6, above-mentioned calcium silicate board with microporous 54 also can adopt ceramic beaverboard.Within the scope of 150 ° of back boxing thermofin 5 upper semi-circles, be two layers of thickness and be the effuser thermofin that 40mm contains ceramic fiber blanket 51. these structures and there is higher effect of heat insulation, can realize the efficient conveying of high-temperature residual heat.
If Fig. 3 is another kind of gas collecting pipe for thermal recovery coke oven cross section concrete structure schematic diagram.The insulating brick that this cross section structure comprises box hat 4 and is positioned at box hat 4 is built layer by laying bricks or stones, and the insulating brick that is positioned at 240 ° of scopes of cross section lower half circle is built layer by laying bricks or stones and is followed successively by the 5mm ceramic fiber blanket 9 being layed on box hat inwall, then on ceramic fiber blanket 9, to build density by laying bricks or stones be 0.6g/cm
3the light heat insulating brick of thickness 65mm, then on this heat insulating brick, build thickness 185mm mullite lightweight edge of a knife brick 10 by laying bricks or stones, between light heat insulating brick and mullite lightweight edge of a knife brick 10, be provided with waterproof kraft paper sliding layer 8.It within the scope of 120 ° of this effuser lower half circle, is the thickness 250mm mullite lightweight axe brick 7 of individual layer.This insulating layer structure is simple, is convenient to maintenance and building construction.
Above-mentioned two kinds of relatively typical cross section structures only having enumerated recovery of heat effuser.In fact effuser cross section structure also has various ways, and method for maintaining of the present invention is not only applicable to the cross section structure of above-mentioned two kinds, is equally applicable in the hot maintenance of effuser of various cross section structures.This method for maintaining is also not limited to the maintenance for gas-collecting branch pipe simultaneously, is also applicable to comprise in the various heat recovery coke ovens of gas gathering manifold in high-temperature residual heat transfer lime.Above-mentioned effuser near-end refers to that effuser is near one end of boiler, and correspondingly effuser far-end refers to one end of effuser stow away from boiler.
Introduced the specific constructive form of some gas collecting pipe for thermal recovery coke oven above, below method for maintaining of the present invention has been elaborated.Repair and replacement method of the present invention comprises following construction procedure:
Stove is pressed in shutoff: in order to realize the hot maintenance of not blowing out of coke oven, the maintenance of coke side effuser and pusher side effuser is to hocket.When maintenance coke side effuser, coke side effuser is maintenance side effuser, otherwise pusher side effuser is maintenance side effuser.The opposite side corresponding with maintenance side effuser is active side effuser.During maintenance, first on furnace roof, with thing shutoff such as flashboard and refractory fiber cotton or refractory fiber blankets, close maintenance side coke oven and push up the connecting passage mouth between each upcast and bridge tube, from the quirk that is connected between the upcast of blocking-up maintenance side and bridge tube, make coke oven homonymy in banking state, the opposite side rising quirk of coke oven is still in running order.When maintenance side effuser near-end flashboard is intact maybe when this end is provided with flashboard, close maintenance side effuser near-end flashboard simultaneously, thereby block contacting of this effuser and proximal channel.
Tube wall perforate: for convenient for maintaining material and workmen's turnover, after the contacting of blocking-up effuser and coke oven, on maintenance side effuser, dig orifice passage, this aperture comprises construction hole and the convection holes that penetrates effuser steel casing and liner thermofin, construction hole and convection holes are rectangular opening, and its aperture length and width size Selection is at 500 ~ 1000mm.Certainly construction hole and convection holes are also not limited to rectangular opening, can also be circular port or other convenient construction and turnover and the hole shape that is beneficial to air flowing.Construction hole and convection holes are positioned on effuser along effuser length direction with staggering, and construct hole and convection holes, alternately corresponding to adjacent coking chamber, make each coking chamber all to having construction hole or convection holes.Convection holes is dug on the end face of effuser, the lateral location at effuser is dug in construction hole, so both turnover of convenient construction material and personnel, are convenient to again in effuser, form axially and warp-wise upstream, are beneficial to quick heat radiating and the air flowing of effuser.
Heat radiation ventilation: after construction hole and convection holes are dug, effuser pipe is interior in hot environment, waste heat in effuser distributes 4 ~ 12 hours under natural convection situation, make pipe surface temperature and inner air tube temperature be down to 25 ℃ ~ 35 ℃, and confirm that in pipe, obnoxious flavour has distributed and filled into outside fresh air.In order to accelerate to dispel the heat air exchanging rate except adopting natural method, can also use the forcing methods such as blast apparatus to the effuser ventilation of dispel the heat, or use natural method is in conjunction with the forcing method ventilation of dispelling the heat fast, to guarantee workmen's trouble-free service.
Shutoff sluice gate: temperature is down to after working temperature in effuser pipe, the aperture of workmen from effuser enters in pipe, first in the flashboard side of effuser near-end flashboard, with refractory ceramic fibre cotton or refractory ceramic fibre blanket heap, builds into shutoff wall.Consider and be positioned at the integrity that the reparation of effuser thermofin is changed inside flashboard, shutoff wall should be piled and build in the outside of flashboard, and the heap that this shutoff wall that is positioned at flashboard outside can complete by the scaling loss hole on flashboard perforate or flashboard outside shutoff wall is built.But shutoff wall is not limited to pile and builds in flashboard outside, also can pile and build in the inner side of flashboard, and its heap barrier material is also not limited to refractory ceramic fibre, can be also other corresponding fire-resistant heat insulating material, even by refractory heat-insulating brick masonry.The shutoff wall that is positioned at effuser near-end flashboard one side is mainly for blocking contacting of effuser and other pipeline completely, to guarantee workmen's safe, good construction environment, has both been conducive to operating efficiency and has improved, and guarantees again life safety.
Remove thermofin: after carrying out above-mentioned preparation work, workmen enters in effuser pipe from construction hole or convection holes, remove the thermofin damaging in pipe, the thermofin of this damage can be both original whole thermofins in effuser pipe, can be also the part thermofin that only can not continue use to damaging.Therefore the dismounting of thermofin can be both complete removal, can be also that local selectivity is removed, and this should be according to aged deterioration situation, the working design requirement of effuser environment for use, pipe inner insulating layer, and the combined factors consideration face such as maintenance mans' current cost is determined.After removing pipe inner insulating layer, should all be transported to outside pipe removing thing, and purge tube inwall, to build new thermofin by laying bricks or stones.
Shutoff bridge tube mouth: in cleaning effuser pipe behind dismounting scene, one by one the connecting passage mouth paving of each bridge tube and effuser on effuser or heap are built to the fire-resistant heat insulating materials such as refractory ceramic fibre cotton or refractory ceramic fibre blanket, take refractory ceramic fibre as each bridge tube of sealer shutoff and effuser connecting passage, so that the security of construction is guaranteed in the tight sealing of connecting passage mouth.Equally, the paving of shutoff bridge tube mouth or heap barrier material, be also not limited to refractory ceramic fibre cotton or refractory ceramic fibre blanket, can also be other associated refractory lagging material, even with refractory heat-insulating material, builds by laying bricks or stones and realize shutoff.
Build thermofin by laying bricks or stones: according to the structure design of effuser pipe inner insulating layer, in effuser box hat, carry out building by laying bricks or stones of liner thermofin, after thermofin has been built by laying bricks or stones, check and thermofin gap is filled, finally on thermofin surface, add and be coated with high temperature clay, so that anti-leak result and the structural stability of strengthening thermofin.
A sealing of hole: in order to guarantee to construct the in the end security in stage and the accessibility of construction, it is proceed step by step that the sealing of hole of the thermofin of construct on effuser hole and convection holes corresponding position is built by laying bricks or stones.First carry out sealing of hole one time, sealing of hole step is the thermofin that seals all convection holes place on maintenance side effuser by building by laying bricks or stones, and an at least reserved construction hole and seal remaining hole of respectively constructing on maintenance side effuser; As sealed, keep in repair the hole of respectively constructing of removing effuser head and the tail two ends on side effuser; Certainly also can reserve the construction hole of effuser head end or tail end or middle section.So far in this step, except effuser is reserved construction hole, it is complete that the thermofin at other convection holes and place, construction hole has all been built filling by laying bricks or stones.
Remove shutoff: after completing a sealing of hole, remove the shutoff wall that effuser flashboard side heap is built, also remove the heap of each bridge tube and effuser connecting passage mouth simultaneously and build shutoff.The following plug of connecting surface of each bridge tube and effuser is not removed, and gives over to expansion joint and fills object plane existence.
Secondary hole sealing: after completing above-mentioned all working, start to build by filling the two construction holes of sealing head and the tail two ends on maintenance side effuser by laying bricks or stones.So far the thermofin in effuser box hat has been built by laying bricks or stones completely.
Open each flashboard: open effuser near-end flashboard; While opening upcast on furnace roof and the connecting passage mouth flashboard between bridge tube, should sequentially carry out.Because each bridge tube is communicated with some upcasts, consider the resume work temperature gradient of gradation and maintenance side effuser of coking chamber, at each bridge tube place, first open the wherein flashboard of connecting passage mouth and the sealer at flashboard place between a upcast and bridge tube, carry out pipeline and dry and coking chamber resume combustion, after 8-36 hours, open again the flashboard sealer of all the other all upcasts and the connecting passage mouth between bridge tube.
Repair box hat: after trying out and confirming normally, the box hat at construct on repair by welding effuser hole and convection holes place, and add painting rust-inhibiting paint at repairing box hat outside surface.
Finally clear up maintenance sites, complete the maintenance of maintenance side effuser.
The above-mentioned hot maintenance step of effuser of having enumerated; but the present invention does not limit the maintenance of gas-collecting branch pipe; according to maintenance thought of the present invention, can carry out equally the hot maintenance repairing of gas gathering manifold; therefore as long as according to basic thought of the present invention; no matter be to gas-collecting branch pipe; or the maintenance that gas gathering manifold is implemented, all falls within the scope of protection of the present invention.
Claims (10)
1. the hot repair and replacement method of gas collecting pipe for thermal recovery coke oven, is characterized in that: this repair and replacement method comprises the following steps:
(1), stove is pressed in shutoff: close connecting passage mouth and/or maintenance side effuser near-end flashboard between maintenance side oven top of coke oven upcast and bridge tube, between blocking-up maintenance side upcast and bridge tube, be connected quirk, make coke oven in banking state;
(2), tube wall perforate: on maintenance side effuser, at least respectively open construction hole and a convection holes, construction hole and convection holes penetrate effuser steel casing and thermofin;
(3), heat radiation ventilation: distribute and discharge high-temperature gas in effuser pipe, make temperature in effuser pipe be down to working temperature;
(4), shutoff sluice gate:workmen enters in effuser pipe, and shutoff effuser near-end flashboard side makes the sealing of effuser proximal port;
(5), remove thermofin: workmen enters in pipe from construction hole or convection holes, removes the thermofin damaging in pipe, and cleaning is removed on-the-spot;
(6), shutoff bridge tube mouth:each bridge tube and effuser connecting passage mouth on shutoff effuser, make this connecting passage mouth sealing;
(7), build thermofin by laying bricks or stones: in effuser pipe, remove thermofin place and build the new thermofin of laying by laying bricks or stones;
(8) a, sealing of hole:all convection holes on sealing maintenance side effuser, and an at least reserved construction hole and seal remaining hole of respectively constructing on maintenance side effuser;
(9), remove shutoff: remove the side shutoff of effuser near-end flashboard and each bridge tube and the shutoff of effuser connecting passage mouth
;
(10), secondary hole sealing: the two construction holes of reserving on sealing maintenance effuser;
(11), open each flashboard: when opening upcast flashboard, should sequentially carry out, at each bridge tube place, first open the wherein a connection channel mouth between upcast and bridge tube, after 8-36 hour, open again all the other all upcasts and the connecting passage mouth between bridge tube;
(12), repair box hat:after trying out normally, the steel casing at construct on repair by welding effuser hole and convection holes place;
(13), on-the-spot cleaning:cleaning maintenance sites, completes effuser maintenance.
2. the hot repair and replacement method of gas collecting pipe for thermal recovery coke oven according to claim 1, is characterized in that: closing between maintenance side oven top of coke oven upcast and bridge tube in connecting passage mouth, close maintenance side effuser near-end flashboard.
3. the hot repair and replacement method of gas collecting pipe for thermal recovery coke oven according to claim 1, is characterized in that: described construction hole and convection holes are positioned on effuser along its length with staggering, and convection holes height is higher than construction hole height; And corresponding construction hole or the convection holes of each coking chamber, this construction hole and convection holes are alternately corresponding to adjacent coking chamber.
4. the hot repair and replacement method of gas collecting pipe for thermal recovery coke oven according to claim 1, is characterized in that: with pressure mode or natural way, to the ventilation of dispelling the heat in effuser pipe, make temperature in the pipe after heat radiation ventilation be down to 25 ℃-35 ℃.
5. the hot repair and replacement method of gas collecting pipe for thermal recovery coke oven according to claim 1, is characterized in that: described shutoff sluice gate is, in effuser near-end flashboard side, refractory ceramic fibre heap is built into shutoff wall.
6. the hot repair and replacement method of gas collecting pipe for thermal recovery coke oven according to claim 1, is characterized in that: described shutoff bridge tube mouth is to take refractory ceramic fibre as each bridge tube of sealer shutoff and effuser connecting passage.
7. the hot repair and replacement method of gas collecting pipe for thermal recovery coke oven according to claim 1, is characterized in that: a described sealing of hole and secondary hole sealing are by building thermofin by laying bricks or stones and closure construction hole and convection holes in construction hole and convection holes place.
8. the hot repair and replacement method of gas collecting pipe for thermal recovery coke oven according to claim 1, is characterized in that: the insulating brick that the cross section structure of described effuser comprises box hat and is positioned at box hat inwall is built layer by laying bricks or stones.
9. the hot repair and replacement method of gas collecting pipe for thermal recovery coke oven according to claim 1, is characterized in that: the cross section structure of described effuser is outside in followed successively by box hat, back boxing thermofin and the hot thermofin of face.
10. the hot repair and replacement method of gas collecting pipe for thermal recovery coke oven according to claim 1, is characterized in that: after building thermofin by laying bricks or stones, check the thermofin gap of newly building by laying bricks or stones, and add and be coated with high temperature clay on new thermofin surface.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106190184A (en) * | 2016-08-12 | 2016-12-07 | 湖南千盟智能信息技术有限公司 | A kind of coke oven heating method and device reducing NOx generation |
| CN110760315A (en) * | 2019-10-12 | 2020-02-07 | 常州江南冶金科技有限公司 | Mounting method of riser heat exchanger |
| CN111499162A (en) * | 2020-04-21 | 2020-08-07 | 上海吉驰玻璃科技有限公司 | Method for replacing silicon carbide rod of float glass tin bath structure in hot state |
| CN114933911A (en) * | 2022-03-28 | 2022-08-23 | 中国五冶集团有限公司 | Method for building gas collecting pipe of clean heat recovery coke oven |
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| CN202116497U (en) * | 2011-06-28 | 2012-01-18 | 东台市节能耐火材料厂 | Air header flashboard of clean type heat recovery coke oven |
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| US4649858A (en) * | 1984-10-12 | 1987-03-17 | Sumitomo Metal Industries, Ltd. | Repairing apparatus for furnace wall |
| US6539602B1 (en) * | 1999-07-05 | 2003-04-01 | Kawasaki Steel Corporation | Method of repairing coke oven |
| CN1978590A (en) * | 2005-12-10 | 2007-06-13 | 攀枝花新钢钒股份有限公司 | Hot-state repair method of bottom refractory brick for coke furnace carbonization chamber |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106190184A (en) * | 2016-08-12 | 2016-12-07 | 湖南千盟智能信息技术有限公司 | A kind of coke oven heating method and device reducing NOx generation |
| CN110760315A (en) * | 2019-10-12 | 2020-02-07 | 常州江南冶金科技有限公司 | Mounting method of riser heat exchanger |
| CN111499162A (en) * | 2020-04-21 | 2020-08-07 | 上海吉驰玻璃科技有限公司 | Method for replacing silicon carbide rod of float glass tin bath structure in hot state |
| CN111499162B (en) * | 2020-04-21 | 2022-12-20 | 上海吉驰玻璃科技有限公司 | Method for replacing silicon carbide rod of float glass tin bath structure in hot state |
| CN114933911A (en) * | 2022-03-28 | 2022-08-23 | 中国五冶集团有限公司 | Method for building gas collecting pipe of clean heat recovery coke oven |
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