CN209639541U - A kind of tunnel oven high temperature preheating band structure - Google Patents
A kind of tunnel oven high temperature preheating band structure Download PDFInfo
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- CN209639541U CN209639541U CN201920175119.0U CN201920175119U CN209639541U CN 209639541 U CN209639541 U CN 209639541U CN 201920175119 U CN201920175119 U CN 201920175119U CN 209639541 U CN209639541 U CN 209639541U
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- exhaust smoke
- tunnel oven
- gas pass
- vertical gas
- preheating zone
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Abstract
The utility model relates to a kind of tunnel oven high temperature preheating band structures, are successively symmetrical arranged 3 pairs of exhaust smoke holes in preheating zone front end；3 pairs of fuel nozzles are set gradually on the right side of exhaust smoke hole；Exhaust smoke hole is connected to vertical gas pass, and vertical gas pass is connected to flue is summarized, and the flue that summarizes is connected to by total smoke outlet and pipeline with the smoke exhaust fan that tunnel oven side is arranged in；Vertical gas pass and summarizes flue and be arranged in the side wall of preheating zone；The installation control flashboard in vertical gas pass；The fuel nozzle that the utility model is installed close to exhaust smoke hole, the local temperature more directly improved, makes temperature of kiln head quickly reach 600-700 DEG C, meets the temperature requirement of magnesia-calcium brick firing.
Description
Technical field
The utility model relates to a kind of tunnel oven high temperature preheating band structures.
Background technique
Tunnel oven is widely used in the industrial circles such as ceramics, refractory material, abrasive material；Tunnel oven is continuous work kiln, one
As length at more than tens to one hundred meter, be burnt into section number square metre.It is distributed according to kiln temperature, is divided into preheating zone, clinkering zone, cold
But band three parts；Burner is equipped in clinkering zone, fuel combustion enters in kiln, and flame forms negative in preheating zone smoke evacuation system
Flow to preheating zone under pressure effect, carry out heat exchange with the green body loaded full of the kiln car in kiln, heated green body, flame cooling at
Flue gas, by including that preheating zone smoke evacuation system expels from kiln.
Product code is placed on dedicated kiln car that wicket enters in kiln from preheating zone, and general ceramics and refractory products require to exist
The problems such as preheating zone is uniformly heated up, and heating rate cannot be too fast, otherwise will appear the cracking of product green body.
The kiln car that green body is loaded under dynamical system promotion, which is arranged to clinkering zone, to be moved, in this motion process and in kiln
Flame carries out countercurrent heat-transfer, and temperature steps up, and reaches the maximum sintering temperature of technique requirement in firing end of tape, subsequently into
Cooling zone gradually cools down, and completes entire sintering process from outlet kiln discharge.
The firing process of the products such as the conventional products being burnt into using tunnel oven, such as ceramics, most of refractory material, it is desirable that
It uniformly heats up in preheating zone, heating rate cannot be too fast, a series of problems, such as otherwise will cause the cracking of product green body.For this purpose,
Conventional tunnel kiln devises the exhaust smoke hole in a row that distribution length accounts for preheating zone total length 2/3rds or so in preheating zone, two in kiln
Side is symmetrical.In this way, adjusting by the flue gas flow to exhaust smoke hole in a row, the temperature of preheating zone along its length is just had adjusted
Distribution, to adapt to the requirement of product sintering curve；Temperature curve 10 as shown in Fig. 5 is that ordinary crossing kiln preheating zone temperature is pressed
It is required that the case where slowly rising.
Magnesia-calcium brick is the compound magnesia refractory product of alkalinity using MgO and CaO as main chemical compositions, and the porosity is low, loading
Softening start temperature is generally greater than 1700 DEG C, and alkali resistance slag is functional.Magnesia-calcium brick is mainly used as the AOD furnace of smelting stainless steel
The cylinder-packing of furnace lining and VOD ladle substitutes original magnesite-chrome brick, is important magnesia-calica refractory.But the firing of magnesia-calcium brick
Technique is brought rapidly up after requiring product to enter kiln, reaches 600-700 DEG C；Otherwise, firing quality can be seriously affected；Conventional tunnel kiln
Preheat band structure, it is difficult to reach this particular/special requirement.
Utility model content
The utility model technical problem of being solved, which is to provide one kind, makes tunnel oven high temperature preheating quick heating, meets magnesia-calcium brick
The tunnel oven high temperature preheating band structure of firing temperature.
The utility model adopts the following technical solution:
The utility model is successively symmetrical arranged 3 pairs of exhaust smoke holes in preheating zone front end；3 pairs of combustions are set gradually on the right side of exhaust smoke hole
Expect burner；The exhaust smoke hole is connected to vertical gas pass, and vertical gas pass is connected to flue is summarized, and the flue that summarizes is by always discharging fume
Mouth and pipeline are connected to the smoke exhaust fan that tunnel oven side is arranged in；The vertical gas pass and summarizes flue and be arranged at preheating zone
In side wall；The installation control flashboard in the vertical gas pass.
Exhaust smoke hole described in the utility model is 3 pairs, and the centre distance of adjacent two pairs of exhaust smoke holes is 1m, first couple of row in left side
Cigarette hole centre distance kiln import 1.5m.
Fuel nozzle described in the utility model is 3 pairs；The burner centre distance of adjacent two pairs of fuel nozzles is 1m；Left side
Last of the burner centre distance of a pair of of fuel nozzle and right side are center 1.2m to the centre distance of exhaust smoke hole.
The length of the utility model preheating zone is 22m.
The utility model good effect is as follows: the utility model is only successively symmetrical arranged 3 pairs of exhaust smoke holes in preheating zone front end,
Close to preheating zone kiln hood central exhaust, high-temperature flue gas is set to cool down under slow situation in the kiln of preheating zone, until kiln hood just collects
In expel from kiln, substantially increase the temperature of preheating zone front, with product generate countercurrent heat-transfer during improve product
Temperature.And firing general setting 10-20 in conventional tunnel kiln preheating zone is to exhaust smoke hole, distribution more than 10 parking stalls and
Preheating zone uneasiness is charged burner, is adjusted by the flue gas flow to exhaust smoke hole in a row, and heating is slow.The utility model is close to row
The fuel nozzle of cigarette hole installation, the local temperature more directly improved make temperature of kiln head quickly reach 600-700 DEG C, meet magnesium
The temperature requirement of calcium brick firing.The temperature curve 9 that attached drawing 5 indicates is exactly that the utility model tunnel oven high temperature preheating band temperature exists
The case where the initial segment is with regard to rapid increase.It forms a sharp contrast with ordinary crossing kiln preheating zone temperature curve 10.
Detailed description of the invention
It is attached that FIG. 1 is a schematic structural view of the utility model；
Attached drawing 2 is the A-A of attached drawing 1 to schematic cross-sectional view；
Attached drawing 3 is the B-B direction schematic cross-sectional view of attached drawing 1；
Attached drawing 4 is the utility model overlooking structure diagram；
Attached drawing 5 is preheating zone temperature distribution history contrast schematic diagram.
Specific embodiment
As shown in attached drawing 1-4, (the tunnel oven product load wagon length conduct of the utility model preheating zone 1 front end 1-3 parking stall
Along kiln length measuring unit, for a kiln car length generally in 1.5-2.5 meters of ranges, usual tunnel furnace preheating zone length is 15-
The length of 20 vehicles) 3 pairs of exhaust smoke holes 3 are successively symmetrical arranged at concentration；3 pairs of fuel are successively symmetrical arranged on 3 right side of exhaust smoke hole to burn
Mouth 7；Exhaust smoke hole 3 and the long 7m of the total layout area of fuel nozzle, are equivalent to 3.5 kiln car bit lengths；And conventional tunnel kiln preheating zone
The general setting 10-20 of firing to exhaust smoke hole 3, charge burner more than 10 parking stalls and in preheating zone uneasiness by distribution；Institute
It states exhaust smoke hole 3 to be connected to vertical gas pass 4, vertical gas pass 4 is connected to flue 6 is summarized, and the flue 6 that summarizes passes through total smoke outlet 8
Be connected to the smoke exhaust fan (not shown) that tunnel oven side is arranged in, the vertical gas pass 4 and summarize flue 6 be arranged at it is pre-
In tropical side wall；The installation control flashboard 5 in the vertical gas pass 4.
At runtime, the flame generated from tunnel kiln firing zone combustion system, in kiln hood, (tunnel oven is close for the utility model
1 entrance location of preheating zone) concentrated setting 3 suction function of exhaust smoke hole under all flow to kiln hood through exhaust smoke hole 3, vertical gas pass 4,
Summarize flue 6, total smoke outlet 8 and kiln Outer Tube, smoke exhaust fan, and by smoke stack emission, improves temperature of kiln head.Meanwhile with row
The temperature in this region that the adjacent fuel nozzle 7 in cigarette hole 3 further increases；It ensure that the preheating zone that product firing process needs
The temperature requirement of high temperature.Kiln car enters clinkering zone 2 thereafter after the heating process that entire preheating zone 1 experienced technique requirement；
Preheating zone 1 and clinkering zone 2 are continuous overall structures.
As shown in Fig. 5, in kiln operation, the utility model makes high-temperature flue gas in kiln close to kiln hood central exhaust
Cool down under slow situation, just concentrate and expel from kiln until kiln hood, substantially increase the temperature of preheating zone front, is produced with product
The temperature of product is improved during raw countercurrent heat-transfer, the fuel nozzle of installation more directly improves the part of 1 kiln hood of preheating zone
Temperature, the temperature distribution history that the temperature distribution history 9 and conventional tunnel kiln preheating zone that the utility model preheating zone 1 is formed are formed
B10 is compared, and in the little range in the parking stall kiln hood 1-3, heating rapidly, makes local temperature quickly reach 500-700 DEG C, meets
The firing condition of the firing process of magnesia-calcium brick.
Finally, it is stated that the above is only the preferred embodiment of the utility model only, not to limit this reality
With novel, any modification, equivalent replacement or improvement made within the spirit and principle of the present invention etc. should all include
It is within the protection scope of the utility model.
Claims (4)
1. a kind of tunnel oven high temperature preheating band structure, it is characterised in that be successively symmetrical arranged 3 pairs of exhaust smoke holes in preheating zone (1) front end
(3)；3 pairs of fuel nozzles (7) are set gradually on the right side of exhaust smoke hole (3)；
The exhaust smoke hole (3) is connected to vertical gas pass (4), and vertical gas pass (4) is connected to flue (6) is summarized, described to summarize flue
(6) it is connected to by total smoke outlet (8) and pipeline with the smoke exhaust fan that tunnel oven side is arranged in；The vertical gas pass (4) and summarize
Flue (6) is arranged in preheating zone (1) side wall；
Installation control flashboard (5) in the vertical gas pass (4).
2. a kind of tunnel oven high temperature preheating band structure according to claim 1, it is characterised in that the exhaust smoke hole (3) is 3
Right, the centre distance of adjacent two pairs of exhaust smoke holes (3) is 1m, first couple of exhaust smoke hole (3) centre distance kiln import 1.5m in left side.
3. a kind of tunnel oven high temperature preheating band structure according to claim 1, it is characterised in that the fuel nozzle (7) is
3 pairs；The burner centre distance of adjacent two pairs of fuel nozzles (7) is 1m；The burner centre distance of the first pair of fuel nozzle (7) in left side
It is center 1.2m to the centre distance of exhaust smoke hole (3) with last of right side.
4. a kind of tunnel oven high temperature preheating band structure according to claim 1, it is characterised in that the length of the preheating zone (1)
Degree is 22m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920175119.0U CN209639541U (en) | 2019-01-31 | 2019-01-31 | A kind of tunnel oven high temperature preheating band structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920175119.0U CN209639541U (en) | 2019-01-31 | 2019-01-31 | A kind of tunnel oven high temperature preheating band structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209639541U true CN209639541U (en) | 2019-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920175119.0U Active CN209639541U (en) | 2019-01-31 | 2019-01-31 | A kind of tunnel oven high temperature preheating band structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209639541U (en) |
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2019
- 2019-01-31 CN CN201920175119.0U patent/CN209639541U/en active Active
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