CN103710034B - 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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- CN103710034B CN103710034B CN201410000934.5A CN201410000934A CN103710034B CN 103710034 B CN103710034 B CN 103710034B CN 201410000934 A CN201410000934 A CN 201410000934A CN 103710034 B CN103710034 B CN 103710034B
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Landscapes
- Coke Industry (AREA)
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, particularly relate 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 having protection of the environment, make full use of the comprehensive advantages such as resource.It is by the raw gas that produces in pit kiln process and some objectionable impuritiess at pit kiln inside reasonably Thorough combustion, recycle high-temp waste gas heat and generate electricity or other resource utilization purposes.Heat recovery coke oven coking chamber adopts negative-pressure operation, and not outer dirt of discharging fume, substantially do not pollute, and heat energy can be fully utilized, obtain paying close attention to more and more widely and applying to ecotope.
Clean type heat recovery coke oven mainly comprises coking chamber, combustion flue, upcast (rising quirk), downtake (decline quirk), a composition such as blast inlet and secondary air inlet.Downtake is only connected with combustion flue with coking chamber, and the upcast mouth of pipe is then connected with effuser by bridge tube.For the consideration of 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 connect into one compared with big unit " fire grate ", pusher side at each " fire grate " top and coke side are provided with two effusers abreast, and this effuser connects to gas gathering manifold again.Some upcasts of each coking chamber are then connected with the effuser of the same side respectively by pusher side bridge tube corresponding with it or coke side bridge tube.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 then be delivered to combustion flue by decline quirk to burn, and the heat that this twice combustion produces is supplied to the desired heat of briquette coking.The high-temp waste gas produced that burns enters into superfluous combustion gases the effuser comprising gas-collecting branch pipe and gas gathering manifold again through upcast and bridge tube, high-temp waste gas is delivered to waste heat boiler and produced steam-electric power the most at last.Because the burnt gas temperature entering into effuser is higher, in addition superfluous inflammable gas also carries out third time burning in effuser, in effuser pipe, high-temp waste gas temperature can reach 1300 DEG C, and containing the unwanted corrosion such as water vapor, SO2, CO gas in waste gas, effuser liner thermofin not only stands the high temperature thermal shocking of heat wave air-flow, and bear the Eroded of obnoxious flavour, the therefore damage that comes off of effuser liner thermofin, it is inevitable for even caving in.Effuser liner thermofin damages or after collapsing, not only heat damages is serious, and waste heat can not get fully effective utilization, and effuser steel casing loses the protection of thermofin, and the oxidation of aggravation box hat, even causes melting scaling loss, cause major safety risks.
Current maintenance scaling loss effuser is all that the method taking coke oven to stop production repairs or replaces it, 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 freezing air contact is met in silica brick blowing out cooling, the a large amount of shrinkage cracking of easy appearance, even come off and cave in, whole body of heater time serious, can be caused to scrap.Moreover thimble-tube boiler is connected to numerous coking chambers and body of heater by gas gathering manifold and some gas-collecting branch pipes, after part coking chamber stops production, the waste heat amount of input thimble-tube boiler must reduce, form the uneven fluctuation supply of boiler residual heat, this directly affects again the turbine of downstream driving and the optimum operation of drive unit and up-time efficiency.Also having in existing method for maintaining is again make new effuser steel casing on the ground, and build liner thermofin within it by laying bricks or stones, old pipe is replaced again with new effuser, intact lagging material in former effuser steel casing material and effuser all goes out of use need not, cause waste, more seriously huge heavy effuser handling replacement quantities like this is very large, maintenance cost is also very large, and effuser liner insulating brick easily causes and loosens 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 keep in repair arrangement again.
Summary of the invention
For the above-mentioned deficiency existing for 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 can not only realize coke oven and not to stop production hot maintenance, 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 pressure stove: close the connecting passage mouth between maintenance side oven top of coke oven upcast and bridge tube and/or keep in repair side effuser near-end flashboard, blocking the connection quirk between maintenance side upcast and bridge tube, make coke oven be in banking state;
(2), tube wall perforate: at least respectively open construction hole and a convection holes on the effuser of maintenance side, 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, shutoff effuser near-end flashboard side, and effuser proximal port is closed;
(5), remove thermofin: workmen enters in pipe from construction hole or convection holes, remove the thermofin damaged 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 close;
(7), build thermofin by laying bricks or stones: in effuser pipe, remove thermofin place build the new thermofin of laying by laying bricks or stones;
(8) a, sealing of hole: close all convection holes on the effuser of maintenance side, and at least reserve a construction hole and close remaining hole of respectively constructing on the effuser of maintenance side;
(9), remove shutoff: remove effuser near-end flashboard side shutoff and each bridge tube and the shutoff of effuser connecting passage mouth;
(10), secondary hole sealing: the two construction holes closing remaining head and the tail two ends on maintenance effuser;
(11), opening each flashboard: should sequentially carry out when opening upcast flashboard, first opening the wherein a connection channel mouth between upcast and bridge tube at each bridge tube place, after 8-36 hour, opening the connecting passage mouth between all the other all upcasts and bridge tubes again;
(12), repair box hat: through trying out normally, the steel casing at repair by welding effuser is constructed hole and convection holes place;
(13), on-the-spot cleaning: cleaning maintenance sites, completes effuser maintenance.
Between closedown maintenance side oven top of coke oven upcast and bridge tube while 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 correspond to adjacent coking chamber alternately, and convection holes height is higher than construction hole height.
In a forced manner or natural way to carry out in effuser pipe heat radiation ventilation, make heat radiation take a breath after pipe in temperature be down to 25 DEG C-35 DEG C.
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 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 and closure construction hole and convection holes by laying bricks or stones in construction hole and convection holes place.
The cross section structure of described effuser comprises box hat and builds layer by laying bricks or stones with the insulating brick being positioned at box hat inwall.
The cross section structure of described effuser is outside in followed successively by box hat, the hot thermofin of back boxing thermofin and face.
After building thermofin by laying bricks or stones, check the thermofin gap of newly building by laying bricks or stones, and add painting high temperature clay on new thermofin surface.
The present invention compared with prior art has following remarkable advantage:
1, the present invention only needs the effuser of side, banking top (pusher side or coke side) when keeping in repair, high-temperature gas still can be passed through from opposite side effuser, coke furnace carbonization chamber is in running order all the time, keeping in repair side effuser and making it normally after work, can start again the maintenance of opposite side effuser, this alternately method for maintaining achieves the hot repair and replacement not stopping quenching stove, ensure that the serialization running of coke oven is produced, both ensure that the safety of maintenance was carried out, stabilized 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 is in high-temperature constant Warm status all the time, completely avoid the shrinkage cracking that the body of heater suddenly cold and hot in cooling maintenance causes and the generation coming off body of heater damage phenomenons such as caving in.On the other hand because coking chamber does not stop production, its high-temperature gas produced still is delivered to thimble-tube boiler by opposite side effuser, coke oven is still equably to boiler heat supplying, thus ensure that the normal operation of the turbine that boiler drives and drive unit, greatly reduce the failure rate of turbine, drive unit and generating set.
3, not integral demounting effuser box hat in method for maintaining of the present invention, the replacing of thermal insulation layer is still carried out in raw steel shell, effuser liner insulating layer structure can not because of lifting loose shift.Owing to still remaining original effuser box hat, the two ends of maintenance effuser had not been cut and had been taken apart, so effuser two ends still keep tight sealing property yet.
4, invention also greatly reduces box hat maintenance material, maintenance construction is convenient, save construction cost, the twists and turns decreased on construction link, greatly shorten the maintenance construction duration, therefore the present invention not only greatly reduces maintenance cost, and has longer work-ing life.
5, the present invention is not also owing to needing handling and the high-altitude installation of carrying out effuser, and workmen is all constructions in pipe almost, and construction safety coefficient is high, thus the safety that ensure that maintenance and produce.
Accompanying drawing explanation
Concrete structure below in conjunction with accompanying drawing effuser is described in further detail the present invention.
Fig. 1 be a kind of gas collecting pipe for thermal recovery coke oven hot maintenance time position of opening schematic diagram;
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 and combines on the furnace roof of " fire grate " by some coke oven bodies, namely 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.Be provided with two effusers 1 respectively abreast at the pusher side of " fire grate " furnace roof and coke side, same coking chamber is communicated on pusher side effuser and coke side effuser respectively by pusher side bridge tube and coke side bridge tube correspondence.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, and the effuser thus shown in Fig. 1 is divided into cylinder pipeline section and circular cone pipeline section along its length.The effuser keeping 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 construct hole 3 and convection holes 2 are positioned on effuser along the length direction of effuser 1 with staggering, namely effuser pipeline section the preceding paragraph of adjacent two coking chambers has construction hole, then adjacent one section is convection holes, and convection holes 2 is positioned at the tip position of effuser 1, hole 3 of constructing then is positioned at the lateral location of effuser 1, make the height location of convection holes always higher than the height in construction hole, this arrangement and method for construction facilitates the turnover of workmen and material, and be positioned at high-order convection holes and be beneficial to high-temperature gas ascension and arrange outward, and make gas in maintenance pipe produce axial flow, produce again warp-wise flowing, thus accelerate the heat radiation ventilation of maintenance effuser.Cut open corresponding hole in effuser box hat 4 corresponding position during maintenance construction and remove the back boxing thermofin of correspondence position, thus forming 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 personnel's material to pass in and out 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.Its different effuser contour structures, 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, and build by laying bricks or stones in box hat 4 and be equipped with the hot thermofin 6 of back boxing thermofin 5 and face, its cross section structure is followed successively by the hot thermofin 6 in box hat 4, back boxing thermofin 5 and face from outside to inside.The hot thermofin 6 in face is positioned at the innermost layer of effuser, and it directly contacts with high temperature gas flow, and the hot thermofin 6 in face is all 1.0-1.5g/cm by density
3anti-erosion mullite vitrified brick circumferentially whole circle arch block form, adjacent anti-erosion mullite vitrified brick build the convex tendon and groove that plane are provided with mutual joggle by laying bricks or stones, this structure not only makes engagement between brick body tight, strong in conjunction with attachment force, and mutually joggle has blocked again high temperature gas flow and has ganged up the erosion of distributing and to box hat, has high defeated thermo-efficiency.Between the hot thermofin 6 of box hat 4 and face, be equipped with back boxing thermofin 5, this back boxing thermofin 5 circumferentially adopts the composite structure of segmentation.Within the scope of 210 ° of lower half circle, first be lay the thick ceramic fiber blanket of one deck 10mm 53 on box hat 4 internal surface, 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-circle, be two layers of thickness is that the effuser thermofin that 40mm contains this structure of ceramic fiber blanket 51. has 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.Layer built by laying bricks or stones by the insulating brick that this cross section structure comprises box hat 4 and is positioned at box hat 4, and the insulating brick being positioned at cross section lower half circle 240 ° of scopes is built layer by laying bricks or stones and is followed successively by the 5mm ceramic fiber blanket 9 be layed on box hat inwall, then on ceramic fiber blanket 9, 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 is the thickness 250mm mullite lightweight axe brick 7 of individual layer within the scope of 120 ° of this effuser lower half circle.This insulating layer structure is simple, is convenient to maintenance and building construction.
The 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 the effuser of various cross section structure.This method for maintaining is also not limited to the maintenance for gas-collecting branch pipe simultaneously, to be 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 effuser one end near boiler, and corresponding effuser far-end refers to one end of effuser stow away from boiler.
Be described above the specific constructive form of some gas collecting pipe for thermal recovery coke oven, below method for maintaining of the present invention elaborated.Repair and replacement method of the present invention comprises following construction procedure:
Shutoff pressure stove: in order to the hot maintenance of the not blowing out realizing coke oven, the maintenance of coke side effuser and pusher side effuser hockets.When keeping in repair coke side effuser, then 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, the connecting passage mouth between maintenance coke oven top, side each upcast and bridge tube is closed with flashboard and the shutoff of the thing such as refractory fiber cotton or refractory fiber blanket, from the connection quirk blocked between the upcast of maintenance side and bridge tube, make coke oven homonymy be in banking state, the opposite side rising quirk of coke oven is then still in running order.When keep in repair side effuser near-end flashboard intact maybe this end is provided with flashboard time, close maintenance side effuser near-end flashboard simultaneously, thus block contacting of this effuser and proximal channel.
Tube wall perforate: the turnover of conveniently keeping in repair material and workmen, after blocking the contacting of effuser and coke oven, maintenance side effuser digs orifice passage, this aperture comprises the construction hole and convection holes that penetrate 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.Certain construction hole and convection holes are also not limited to rectangular opening, can also be circular port or other convenient construction and turnover and be beneficial to the hole shape of air flowing.Construction hole and convection holes are positioned on effuser along effuser length direction with staggering, and namely construction hole and convection holes correspond to adjacent coking chamber alternately, make each coking chamber all to having construction hole or convection holes.Convection holes is dug on the end face of effuser, lateral location at effuser is then dug in hole of constructing, so both turnover of convenient construction material and personnel, are convenient to again be formed in effuser 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, hot environment is in effuser pipe, 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 DEG C ~ 35 DEG C, and confirm that in pipe, obnoxious flavour has distributed and filled into outside fresh air.In order to accelerate heat radiation air exchanging rate except employing natural method, the forcing methods such as blast apparatus can also be used to carry out heat radiation ventilation to effuser, or use natural method to be dispelled the heat ventilation, fast to ensure the trouble-free service of workmen in conjunction with forcing method.
Shutoff sluice gate: after temperature is down to working temperature in effuser pipe, workmen enters in pipe from the aperture effuser, and first cotton at the flashboard side refractory ceramic fibre of effuser near-end flashboard or refractory ceramic fibre blanket heap builds into shutoff wall.Consider and be positioned at the integrity that inside flashboard, the reparation of effuser thermofin is changed, shutoff wall should be piled and build in the outside of flashboard, and this shutoff wall be positioned at outside flashboard completes outside shutoff wall heap by the scaling loss hole on flashboard perforate or flashboard is built.But shutoff wall is not limited to heap and builds outside flashboard, and also can pile and build in the inner side of flashboard, its heap barrier material is also not limited to refractory ceramic fibre, also can be other corresponding fire-resistant heat insulating material, even by refractory heat-insulating brick masonry.The shutoff wall being positioned at effuser near-end flashboard side mainly for blocking contacting of effuser and other pipeline completely, to guarantee safe, the good construction environment of workmen, being both conducive to operating efficiency and having improved, again guarantee 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 damaged in pipe, the thermofin of this damage both can be original whole thermofin in effuser pipe, also can be the part thermofin that only can not continue damaging to use.Therefore the dismounting of thermofin both can be whole dismounting, and also can be that local selective is removed, this should according to the aged deterioration situation of effuser environment for use, pipe inner insulating layer, working design requirement, and the combined factors such as maintenance mans' current cost considers that face is determined.After dismounting pipe inner insulating layer, dismounting thing all should be transported to outside pipe, 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 fire-resistant heat insulating materials such as the cotton or refractory ceramic fibre blanket of refractory ceramic fibre are built to the connecting passage mouth paving of bridge tube each on effuser and effuser or pile, take refractory ceramic fibre as each bridge tube of sealer shutoff and effuser connecting passage, to make, connecting passage mouth is tight to be closed, and guarantees the security of constructing.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 build by laying bricks or stones with refractory heat-insulating material and realize shutoff.
Build thermofin by laying bricks or stones: in effuser box hat, carry out building by laying bricks or stones of liner thermofin according to the structure design of effuser pipe inner insulating layer, after thermofin has been built by laying bricks or stones, check and thermofin gap is filled, last adding on thermofin surface, is coated with high temperature clay, to strengthen anti-leak result and the structural stability of thermofin.
A sealing of hole: in order to ensure 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 effuser is constructed hole and convection holes corresponding position is built by laying bricks or stones.First carry out a sealing of hole, a sealing of hole step closes the thermofin at all convection holes places on the effuser of maintenance side, and at least reserve a construction hole and close remaining hole of respectively constructing on the effuser of maintenance side; As closed maintenance side effuser removed each construction hole at effuser head and the tail two ends; Certainly the construction hole of effuser head end or tail end or middle section can also be reserved.So far, in this step, except effuser reserved construction hole, masonry infill is complete all for other convection holes and the thermofin at construction hole place.
Remove shutoff: after completing a sealing of hole, remove the shutoff wall that effuser flashboard side heap is built, the heap simultaneously also removing each bridge tube and effuser connecting passage mouth builds 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, begins through to fill and builds by laying bricks or stones and close the two construction holes of keeping in repair head and the tail two ends on the effuser of side.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; Should sequentially carry out when opening the upcast on furnace roof and the connecting passage mouth flashboard between bridge tube.Because each bridge tube is communicated with some upcasts, consider that coking chamber is resumed work the temperature gradient of gradation and maintenance side effuser, the flashboard of the connecting passage mouth wherein between a upcast and bridge tube and the sealer at flashboard place is first opened at each bridge tube place, carry out pipeline to dry and coking chamber resume combustion, after 8-36 hours, open the ram seal thing of the connecting passage mouth between all the other all upcasts and bridge tubes again.
Repair box hat: through trying out and confirming normally, the box hat at repair by welding effuser is constructed hole and convection holes place, and add painting rust-inhibiting paint at repairing box hat outside surface.
Finally clear up maintenance sites, complete the effuser maintenance of maintenance side.
Above-mentionedly enumerate the hot maintenance step of effuser; but the present invention does not limit the maintenance of gas-collecting branch pipe; the hot maintenance repairing of gas gathering manifold can be carried out equally according to maintenance thought of the present invention; as long as therefore according to basic thought of the present invention; no matter be to gas-collecting branch pipe; or to the maintenance that gas gathering manifold is implemented, all fall within the scope of protection of the present invention.
Claims (9)
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), shutoff pressure stove: close the connecting passage mouth between maintenance side oven top of coke oven upcast and bridge tube and/or keep in repair side effuser near-end flashboard, blocking the connection quirk between maintenance side upcast and bridge tube, make coke oven be in banking state;
(2), tube wall perforate: at least respectively open construction hole and a convection holes on the effuser of maintenance side, 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, shutoff effuser near-end flashboard side, and effuser proximal port is closed;
(5), remove thermofin: workmen enters in pipe from construction hole or convection holes, remove the thermofin damaged 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 close;
(7), build thermofin by laying bricks or stones: in effuser pipe, remove thermofin place build the new thermofin of laying by laying bricks or stones;
(8) a, sealing of hole: close all convection holes on the effuser of maintenance side, and at least reserve a construction hole and close remaining hole of respectively constructing on the effuser of maintenance side;
(9), remove shutoff: remove effuser near-end flashboard side shutoff and each bridge tube and the shutoff of effuser connecting passage mouth;
(10), secondary hole sealing: close two construction holes reserved on maintenance effuser;
(11), opening each flashboard: should sequentially carry out when opening upcast flashboard, first opening the wherein a connection channel mouth between upcast and bridge tube at each bridge tube place, after 8-36 hour, opening the connecting passage mouth between all the other all upcasts and bridge tubes again;
(12), repair box hat: through trying out normally, the steel casing at repair by welding effuser is constructed 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: 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 correspond to adjacent coking chamber alternately.
3. the hot repair and replacement method of gas collecting pipe for thermal recovery coke oven according to claim 1, is characterized in that: in a forced manner or natural way to carry out in effuser pipe heat radiation ventilation, make heat radiation take a breath after pipe in temperature be down to 25 DEG C-35 DEG C.
4. 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.
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 bridge tube mouth take refractory ceramic fibre as each bridge tube of sealer shutoff and effuser connecting passage.
6. 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 and closure construction hole and convection holes by laying bricks or stones in construction hole and convection holes place.
7. 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 comprises box hat and builds layer by laying bricks or stones with the insulating brick being positioned at box hat inwall.
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 cross section structure of described effuser is outside in followed successively by box hat, the hot thermofin of back boxing thermofin and face.
9. 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, checks the thermofin gap of newly building by laying bricks or stones, and adds painting high temperature clay on new thermofin surface.
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| CN201410000934.5A CN103710034B (en) | 2014-01-02 | 2014-01-02 | Thermal state replacement and maintenance method for heat recovery coke oven gas collector |
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| CN201410000934.5A CN103710034B (en) | 2014-01-02 | 2014-01-02 | Thermal state replacement and maintenance method for heat recovery coke oven gas collector |
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| 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 |
| 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 |
| CN114933911B (en) * | 2022-03-28 | 2023-05-23 | 中国五冶集团有限公司 | Method for building clean heat recovery coke oven gas collecting tube |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH065155B2 (en) * | 1984-10-12 | 1994-01-19 | 住友金属工業株式会社 | Furnace wall repair device for kiln |
| EP1067167A3 (en) * | 1999-07-05 | 2003-02-05 | Kawasaki Steel Corporation | Method of repairing coke oven and apparatus for taking-in bricks for repair |
| 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 |
| CN101659871B (en) * | 2009-09-18 | 2013-01-02 | 山西兴高能源股份有限公司 | Method for repairing main gas collecting tube of clean heat recovery coke-oven |
| 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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Inventor after: Xu Guangping Inventor after: Liu Dandan Inventor after: He Jiangrong Inventor after: Zhang Guiming Inventor after: Liu Pengcheng Inventor after: Song Yang Inventor after: Song Yihua Inventor after: Xu Rong Inventor after: He Jie Inventor before: Xu Guangping Inventor before: He Jiangrong Inventor before: Zhang Guiming Inventor before: Liu Pengcheng Inventor before: Song Yang Inventor before: Song Yihua Inventor before: Xu Rong Inventor before: He Jie |
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Free format text: CORRECT: INVENTOR; FROM: XU GUANGPING HE JIANGRONG ZHANG GUIMING LIU PENGCHENG SONG YANG SONG YIHUA XU RONG HE JIE TO: XU GUANGPING LIU DANDAN HE JIANGRONG ZHANG GUIMING LIU PENGCHENG SONG YANG SONG YIHUA XU RONG HE JIE |
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Address after: 224213 No. 3 martyrs Road, Dongtai, Jiangsu, Yancheng City Patentee after: JIANGSU ZHONGLEI ENERGY-SAVE SCIENCE AND TECHNOLOGY DEVELOPMENT Co.,Ltd. Address before: 224213 No. 3 martyrs Road, Dongtai, Jiangsu, Yancheng City Patentee before: Dongtai Energy-Saving Refractory Factory |