CN101168673B - Heat-insulation water-sealing groove for coke dry quenching furnace and preparation method thereof - Google Patents
Heat-insulation water-sealing groove for coke dry quenching furnace and preparation method thereof Download PDFInfo
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- CN101168673B CN101168673B CN2007101984296A CN200710198429A CN101168673B CN 101168673 B CN101168673 B CN 101168673B CN 2007101984296 A CN2007101984296 A CN 2007101984296A CN 200710198429 A CN200710198429 A CN 200710198429A CN 101168673 B CN101168673 B CN 101168673B
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Abstract
The present invention relates to a thermal insulation water sealing slot used for a dry coke furnace and the preparation method thereof. The thermal insulation water sealing slot comprises a bottom plate, an air through hole arranged at the center of the bottom plate, and a saillant outer skirt edge and an inner skirt edge which are arranged on the periphery of the through hole. The invention is characterized in that the thermal insulation water sealing slot is formed by welding and fixing the bottom plate, the outer skirt edge and the inner skirt edge, and a fire-resistant and thermal insulating material layer is arranged on the inner side of the inner skirt edge. The preparation method adopts a welding method, and the fire-resistant and thermal insulating material layer is formed by casting. The thickness of the wall is one-third of the original, and the stress bearing capability is four times of the original and can bear the damage of the expansion and contraction stress brought about by quick cold and quick hot, the annealing process is required before the operation, the stress bore by each welding opening cannot enlarge rapidly because of the overall deformation, the crack cannot be caused, and 50000 times of coke discharging can be ensured under normal operation condition. Meanwhile, the water sealing slot has simple preparation method, is time saving and labor-saving, has low production cost and is energy saving and environmental protective. The thermal insulation water sealing slot used for a dry coke furnace and the preparation method thereof can be widely applied in the thermal insulation water sealing slot of the dry coke furnaces with various specifications.
Description
Technical field
The invention belongs to coal chemical technology dry coke quenching Technology field, be specifically related to a kind of coke dry quenching furnace fire door water seal heat-insulation water-sealing groove for coke dry quenching furnace and preparation method thereof.
Background technology
Dry quenching(of coke) is called for short dry coke quenching (CDQ), is a kind of coke quenching method that employing rare gas element for coke wet quenching extinguishes red-hot coke.Compare with conventional wet quenching, dry coke quenching can not only be recycled red Jiao's sensible heat, and can improve coke quality, reduces cost, and alleviates the pollution of quenching operation to environment, so worldwide be used widely recently.When adopting dry coke quenching, air pressure under normal operation circumstances in the coke dry quenching furnace is generally at 300～1000Pa, temperature is in 900～1000 ℃ of scopes, the major ingredient of gas is inflammable and explosive carbon monoxide and hydrogen and nitrogen in the coke oven, a spot of carbonic acid gas, for the furnace gas that the pressure reduction that prevents because of furnace high-temperature gas and ambient atmosphere causes is revealed, usually adopt in the additional method that heat insulation water sealed tank is set in the furnace roof exit of coke dry quenching furnace, and utilize heat insulation water sealed tank in, the liquid that holds between outer skirt, make and be buckled in the water sealed tank, the inside and outside liquid level of the bell between outer skirt forms hydraulic pressure difference, the sealing fire door, and utilize this hydraulic pressure difference to offset the pressure reduction of furnace high-temperature gas and ambient atmosphere.
At present, domestic and international coal chemical enterprise, as Japanese JSP company, Japan company of Nippon Steel, Shanghai Baosteel, enterprises such as group of Beijing Capital Iron and Steel and Jiangsu Sha Gang group, the heat insulation water sealed tank of the coke dry quenching furnace that uses is spheroidal graphite cast iron or cast alloy iron foundry goods, the wall thickness of this class foundry goods should not be less than 20mm, coefficient of extension is poor, generally only be 2%～4%, and heat-conduction coefficient is low, in existing processing condition, promptly water sealed tank is heated to 900 ℃～1050 ℃ gradually by furnace high-temperature gas, promptly with the normality water quick cooling, and once circulated in per 9～10 minutes, easily because of suffering water quick cooling to produce micro-flaw, this micro-flaw promptly is being transformed into visible crack to above-mentioned foundry goods about burnt about 10000 stoves of normal dress, and very easily breaks and cause dried putting out in the stove to intake in a large number.In addition, the heat insulation water sealed tank of above-mentioned foundry goods is relatively heavier, safeguards, uses inconvenience.In addition, the heat insulation water sealed tank of this class in the preparation, at first need to prepare mold according to the specification of dry coke quenching auxiliary, then use the mold integral cast for preparing to form above-mentioned heat insulation water sealed tank, also need at last the heat insulation water sealed tank that is shaped thermal treatment such as anneal, manufacturing process is very numerous and diverse, not only needs to use multiple main equipment and special production place, and need to consume a large amount of energy and manpower, also cause environmental pollution easily.
Summary of the invention
The objective of the invention is to propose a kind of simple in structure, heat conductivity better, not easy to crack, the simple heat-insulation water-sealing groove for coke dry quenching furnace of preparation technology, it is with low cost, and weight is lighter, long service life, easy handling and maintenance.
It is simple that another object of the present invention is to propose a kind of technology, energy-conserving and environment-protective, and the preparation method of the heat-insulation water-sealing groove for coke dry quenching furnace that cost of manufacture is lower, to overcome the heat insulation water sealed tank heaviness of the continuous casting that exists in the prior art, preparation method's complexity, and the heat insulation water sealed tank short defective in work-ing life of preparation.
The present invention is achieved through the following technical solutions:
A kind of heat-insulation water-sealing groove for coke dry quenching furnace, comprise a base plate, gas via-hole is offered at the base plate center, the periphery of through hole is provided with the outer skirt and the inner skirt of projection respectively, its feature is fixed and is formed by base plate, outer skirt, inner skirt welding at described heat insulation water sealed tank, and the inboard of described inner skirt is provided with the fire-resistant heat insulating material layer.
Concrete falls, and described base plate, outer skirt and inner skirt are made by the hot-rolled low carbon steel plate of thickness 3-10mm, and described outer skirt and inner skirt are welded after being spliced by the hot-rolled low carbon steel plate.
Described base plate is the hot-rolled low carbon steel plate of thickness 3-10mm, and the outer skirt and the inner skirt of the end face welding stationary annular of described base plate are provided with inner skirt with one heart on the base plate of the inboard of outer skirt.
Described fire-resistant heat insulating material layer is the ring-type pouring layer that is fixed on the inner skirt inwall, and the thickness of described fire-resistant heat insulating material is 15-40mm.
Described welding is meant adopts general mild steel electrode that outer skirt, inner skirt and the welding of described base plate are fixed.
Described fire-resistant heat insulating material is general pourable fire-resistant heat insulating material.
Described inner skirt and outer skirt are the tubular spares that is spliced into by welding process by the hot-rolled low carbon steel plate, the V-arrangement of the splicing port of hot-rolled low carbon steel plate for working in coordination.
The upper and lower splicing limit of a described splicing port becomes 60 degree angles with the upper edge of hot-rolled low carbon steel plate respectively with the lower edge, and is centrosymmetry.
The preparation technology of described heat-insulation water-sealing groove for coke dry quenching furnace is characterized in that this preparation technology comprises:
Adopt the hot-rolled low carbon steel plate of thickness 3-10mm to make base plate, inner skirt and outer skirt assembly, then inner skirt and outer skirt are fixed along the gas via-hole outer at base plate center and the end face welding of base plate, inner skirt is positioned at the inner and setting with one heart of outer skirt, uses pourable fire-resistant heat insulating material to pour into a mould the annular fire-resistant heat insulating material layer of a thickness as 15-40mm on the inwall of inner skirt.
Described welding is to adopt general Carbon Steel Covered Electrode that one end and the welding of described base plate end face of outer skirt, inner skirt is fixing.
The shape of this heat-insulation water-sealing groove for coke dry quenching furnace is basic consistent with the heat insulation water sealed tank of original casting, but it only is the raw material of the hot-rolled low carbon steel plate of 3～10m as base plate, inner skirt and the outer skirt assembly of heat-insulation water-sealing groove for coke dry quenching furnace with thickness, and adopt the three to weld the fixed structure to form this coke dry quenching furnace water sealed tank, this not only makes this heat insulation water sealed tank have higher hot expansion and contraction and good good heat conductivity, the convergent-divergent stress of whole heat insulation water sealed tank is reduced, the weight of this heat insulation water sealed tank is reduced greatly.
This heat-insulation water-sealing groove for coke dry quenching furnace is by outer skirt, inner skirt and base plate are welded, its each assembly material can be general steel plate or general hot rolling mild steel plate, outer skirt and inner skirt can be welded by above-mentioned steel plate, the splicing port of steel plate can be the non-rectilinear weld bond, be preferably V-arrangement, with better elimination expansion and string stress, prevent to splice the cracking of port, welding process can adopt general mild steel electrode, behind outer skirt and inner skirt the welding formation tubular construction through the splicing port, can directly weld with base plate, form the agent structure of this heat-insulation water-sealing groove for coke dry quenching furnace.
Can adopt general refractory castable at the inboard refractory insulating layer that is provided with of inner skirt, this thermofin generally is to adopt anti-1050 ℃～1500 ℃ common refractory materialss of pyritous, blast furnace mould material etc. for example, this mould material is formed the tubular flame retardant coating of thickness between 15～40mm along the interior of inner skirt along cast, this refractory insulating layer can be reduced to the bearing high temperature of inner skirt about 200 ℃, and can effectively prevent the rapid heat cycle of inner skirt, is greatly improved the work-ing life of inner skirt, generally can be more than 5 times of former work-ing life.
The preparation method of this heat-insulation water-sealing groove for coke dry quenching furnace is simple, the base metal structure that only need use conventional cutting method and welding process just can prepare water sealed tank, specifically can adopt oxygencutting, plasma cutting or cut mechanically method etc., with thickness is that hot-rolled low carbon steel plate or the general steel plate of 3～10m is divided into inside and outside shirt rim and base plate, thereafter by conventional welding process and welding material, above-mentioned inside and outside shirt rim and base plate is welded together as general mild steel electrode.Preparation method's technology of above-mentioned heat-insulation water-sealing groove for coke dry quenching furnace is simple and direct, need not to use any main equipment and special processing site, and need not to expend a large amount of energy, and is time saving and energy saving, and meet environmental protection requirement.
Beneficial effect of the present invention is: the wall thickness of this heat-insulation water-sealing groove for coke dry quenching furnace is original 1/3rd, the degree of deformation height that allows, the stress ability to bear then for original 4 times, can bear the destruction of the flexible stress of expansion that rapid heat cycle brings and with low cost, need not anneal before the use, it is big that the stress that each soldering opening bore can sharply not become because of the distortion of integral body, therefore the crack can be do not occurred, 50000 burnt damages that result of use can not occur influencing of dress can be guaranteed under the normal service condition.Simultaneously, the preparation technology of this heat-insulation water-sealing groove for coke dry quenching furnace is simple, time saving and energy saving, the low and energy-conserving and environment-protective of cost.The present invention can be widely used as the heat insulation water sealed tank of the coke dry quenching furnace of all size.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing and embodiment.
Fig. 1 is the cross-sectional view of heat-insulation water-sealing groove for coke dry quenching furnace among the embodiment 1;
Fig. 2 is the perspective view of heat-insulation water-sealing groove for coke dry quenching furnace among the embodiment 2;
Fig. 3 is the cut-away section structural representation of heat-insulation water-sealing groove for coke dry quenching furnace among the embodiment 2;
Fig. 4 is the application cross-sectional view of this heat-insulation water-sealing groove for coke dry quenching furnace among the embodiment 2.
Embodiment
Embodiment 1 is as Fig. 1, and the metal of this heat-insulation water-sealing groove for coke dry quenching furnace constitutes main body and is divided into inner skirt 3, outer skirt 2 and base plate 1 three parts, is close in the inboard of inner skirt to be provided with one deck fire-resistant heat insulating material pouring layer 4.
The center of base plate 1 offers gas via-hole 5, be welded with inner skirt 3 on the base plate of gas via-hole outer rim, the outer ring of inner skirt is welded with outer skirt 2, inner skirt and outer skirt are tubular construction, inner skirt and outer skirt welding with one heart are fixing, base plate, inner skirt and outer skirt are common A3 hot-rolled low carbon steel plate materials, its thickness is about 3-5mm, the refractory heat-insulating pouring layer 4 that fixedly installs in the inboard of inner skirt is for can bear 1050 ℃～1500 ℃ pyritous refractory heat-insulating pouring layers, and its thickness is about 15-20mm.
The preparation method of this heat-insulation water-sealing groove for coke dry quenching furnace is as follows: will cut perforate on the hot-rolled low carbon steel plate earlier, the preparing centre has the base plate of gas via-hole, the inner skirt of tubular and an end and the base plate of outer skirt are welded, form the agent structure of this heat insulation water sealed tank, adopt general blast furnace refractory castable to form the fire-resistant heat insulating material layer, obtain this coke dry quenching furnace refractory heat-insulating water sealed tank in the cast of the inboard of inner skirt.Above-mentioned being welded as adopts common low carbon Steel Electrode E422 to carry out the routine welding.
This heat-insulation water-sealing groove for coke dry quenching furnace uses experiment through the fire door of Jiangsu Sha Gang group three coke dry quenching furnaces in coke-oven plant; experimental result shows; this water sealed tank can be good at adaptation and adorns shock heating and shrend severe environment in the burnt technology; though its bulk expansion degree is very high; but its internal stress a little less than; the fire-resistant heat insulating material layer of inner skirt inboard has carried out effective protection to the inner skirt of the easiest appearance damage simultaneously; make inner skirt under the rapid heat cycle condition directly be heated and cooling delays; consistence is shunk in the expansion that has guaranteed heat insulation water sealed tank integral body, is existing more than 5 times of heat insulation water sealed tank of casting work-ing life.
The heart cutting of base plate has gas via-hole, be welded with inner skirt on the base plate of gas via-hole outer rim, the outer ring of inner skirt is welded with outer skirt, the tubular construction that inner skirt and outer skirt are welded for the plain carbon stool plate, and inner skirt and outer skirt are weldingly fixed on the base plate with one heart.Base plate, inner skirt and outer skirt are the plain carbon stool panel material, and its thickness is about 8-10mm, and the refractory heat-insulating pouring layer that fixedly installs in the inboard of inner skirt is for can bear 1050 ℃～1500 ℃ pyritous refractory heat-insulating pouring layers.Its thickness is about 35-40mm.
The preparation method of this heat-insulation water-sealing groove for coke dry quenching furnace is as follows: will cut perforate on the hot-rolled low carbon steel plate earlier, the preparing centre has the base plate of gas via-hole, adopt the rectangle carbon steel sheet of determining specification then, two opposite side that form splicing port 6 are cut into the V-arrangement of the splicing that can cooperatively interact, port is spliced in welding after being spliced into tubular then, the inner skirt of tubular and an end and the base plate of outer skirt are welded, form the agent structure of this heat insulation water sealed tank, adopt general blast furnace refractory castable to form the fire-resistant heat insulating material layer at last, obtain this coke dry quenching furnace refractory heat-insulating water sealed tank in the cast of the inboard of inner skirt.Above-mentioned being welded as adopts the common low carbon Steel Electrode to carry out the routine welding.
The concrete use-pattern of this refractory heat-insulating water sealed tank is seen accompanying drawing 4, this refractory heat-insulating water sealed tank is fixedly installed on the fire door of coke dry quenching furnace 9, spiral-lock bell 7 on it, hold water 8 between inner skirt 3 and the outer skirt 2, fasten the inside and outside formation water seal at position at bell, bell is with gas via-hole 5 sealings of offering on the base plate, high temperature and high pressure gas at first contacts with the fire-resistant heat insulating material layer 4 of the inner skirt of refractory heat-insulating water sealed tank, the low heat conductivity of fire-resistant heat insulating material layer can make inner skirt slowly be heated and expand with heat insulation water sealed tank integral body, can not produce local failure stress.
Claims (10)
1. heat-insulation water-sealing groove for coke dry quenching furnace, comprise a base plate, gas via-hole is offered at the base plate center, the periphery of through hole is provided with the outer skirt and the inner skirt of projection respectively, it is characterized in that: described heat insulation water sealed tank is fixed and is formed by base plate, outer skirt, inner skirt welding, the inboard of described inner skirt is provided with the fire-resistant heat insulating material layer, and described fire-resistant heat insulating material layer is the ring-type pouring layer that is fixed on the inner skirt inwall.
2. heat-insulation water-sealing groove for coke dry quenching furnace according to claim 1 is characterized in that: described base plate, outer skirt and inner skirt are made by the steel plate of thickness 3-10mm, and described outer skirt and inner skirt are welded after being spliced by steel plate.
3. heat-insulation water-sealing groove for coke dry quenching furnace according to claim 1 and 2, it is characterized in that: described base plate is the hot-rolled low carbon steel plate of thickness 3-10mm, the outer skirt and the inner skirt of the one end face welding stationary annular of described base plate are provided with inner skirt with one heart on the base plate of outer skirt inboard.
4. heat-insulation water-sealing groove for coke dry quenching furnace according to claim 1 is characterized in that: the thickness of described fire-resistant heat insulating material layer is 15-40mm.
5. heat-insulation water-sealing groove for coke dry quenching furnace according to claim 1 is characterized in that: described outer skirt, inner skirt and described base plate are to adopt general mild steel electrode welding fixed.
6. according to claim 1 or 4 described heat-insulation water-sealing groove for coke dry quenching furnace, it is characterized in that: described fire-resistant heat insulating material is general pourable fire-resistant heat insulating material.
7. heat-insulation water-sealing groove for coke dry quenching furnace according to claim 1 and 2 is characterized in that: described inner skirt and outer skirt are the tubular spares that is spliced into by welding process by the hot-rolled low carbon steel plate, the V-arrangement of the splicing port of hot-rolled low carbon steel plate for working in coordination.
8. heat-insulation water-sealing groove for coke dry quenching furnace according to claim 7 is characterized in that: the upper and lower splicing limit of a described splicing port becomes 60 degree angles with the upper edge of hot-rolled low carbon steel plate respectively with the lower edge, and is centrosymmetry.
9. the preparation technology of the described heat-insulation water-sealing groove for coke dry quenching furnace of claim 1, it is characterized in that: this preparation technology comprises: adopt the hot-rolled low carbon steel plate of thickness 3-10mm to make base plate, inner skirt and outer skirt, then inner skirt and outer skirt are fixed along the gas via-hole outer at base plate center and the end face welding of base plate, inner skirt is positioned at the inner and setting with one heart of outer skirt, uses pourable fire-resistant heat insulating material to pour into a mould the annular fire-resistant heat insulating material layer of a thickness as 15-40mm on the inwall of inner skirt.
10. the preparation technology of heat-insulation water-sealing groove for coke dry quenching furnace according to claim 9 is characterized in that: described welding is to adopt general Carbon Steel Covered Electrode that one end of outer skirt, inner skirt is fixed with the welding of described base plate end face.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101984296A CN101168673B (en) | 2007-12-11 | 2007-12-11 | Heat-insulation water-sealing groove for coke dry quenching furnace and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101984296A CN101168673B (en) | 2007-12-11 | 2007-12-11 | Heat-insulation water-sealing groove for coke dry quenching furnace and preparation method thereof |
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| CN101168673A CN101168673A (en) | 2008-04-30 |
| CN101168673B true CN101168673B (en) | 2011-07-20 |
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| CN2007101984296A Expired - Fee Related CN101168673B (en) | 2007-12-11 | 2007-12-11 | Heat-insulation water-sealing groove for coke dry quenching furnace and preparation method thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102492440B (en) * | 2011-12-16 | 2013-11-13 | 宁波钢铁有限公司 | Protection method for weld on inner wall of water seal seat used on mouth of coke dry quenching furnace |
| CN108977207A (en) * | 2017-06-01 | 2018-12-11 | 科利特环能科技（大连）有限公司 | A kind of quenching oven coke tank and dress coke installation |
| CN110776931A (en) * | 2019-12-10 | 2020-02-11 | 攀钢集团西昌钢钒有限公司 | Tamping coke oven top water seal device and tamping coke oven top water seal system |
| CN111994495B (en) * | 2020-09-23 | 2022-03-15 | 衡山食为天食用油有限公司 | Tea-seed oil storage device of low temperature protection |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2455717Y (en) * | 2000-12-28 | 2001-10-24 | 宝山钢铁股份有限公司 | Water blocking device for dry died cokery mouth |
| KR20020052504A (en) * | 2000-12-26 | 2002-07-04 | 이구택 | Automatic apparatus for inspecting gas pipe laying |
| CN201144212Y (en) * | 2007-12-11 | 2008-11-05 | 江苏沙钢集团有限公司 | Heat insulation water seal tank for coke dry quenching furnace |
-
2007
- 2007-12-11 CN CN2007101984296A patent/CN101168673B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020052504A (en) * | 2000-12-26 | 2002-07-04 | 이구택 | Automatic apparatus for inspecting gas pipe laying |
| CN2455717Y (en) * | 2000-12-28 | 2001-10-24 | 宝山钢铁股份有限公司 | Water blocking device for dry died cokery mouth |
| CN201144212Y (en) * | 2007-12-11 | 2008-11-05 | 江苏沙钢集团有限公司 | Heat insulation water seal tank for coke dry quenching furnace |
Non-Patent Citations (2)
| Title |
|---|
| 蒋少有.炼焦炉上升管水封盖的结构型式.《鞍钢技术》.1986,(第2期), * |
| 韩加建.焦炉上升管盖改水封装置简介.《山西化工》.1994,(第2期),23-24. * |
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