CN206583296U - A kind of ceramic kiln with cooling control structure - Google Patents

A kind of ceramic kiln with cooling control structure Download PDF

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Publication number
CN206583296U
CN206583296U CN201720203776.2U CN201720203776U CN206583296U CN 206583296 U CN206583296 U CN 206583296U CN 201720203776 U CN201720203776 U CN 201720203776U CN 206583296 U CN206583296 U CN 206583296U
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China
Prior art keywords
top cover
burner hearth
refractory slab
kiln
perforate
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CN201720203776.2U
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Chinese (zh)
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王琤
张松
赵波
张辉
杨锐
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Mstar Technology Ltd In Hangzhou
Tsinghua University
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Mstar Technology Ltd In Hangzhou
Tsinghua University
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Abstract

The utility model is related to a kind of ceramic kiln with cooling control structure, belongs to ceramic sintering technical field.Including burner hearth, kiln outer wall, liftable top cover, heater, collection cigarette hood, controlled admission line, soaking refractory slab and perforate ventilation refractory slab, heater is arranged in four walls of burner hearth, perforate ventilates refractory slab longitudinal arrangement in burner hearth, base substrate to be burnt till is placed on perforate ventilation refractory slab, soaking refractory slab is located at the top of the superiors' base substrate to be burnt till, the bottom of burner hearth is provided with controlled admission line, and the top of burner hearth is provided with liftable top cover, and the top of top cover is provided with collection cigarette hood.Ceramic kiln of the present utility model, the controlled reduction of in-furnace temperature, control lifting top cover, the controlled air inlet in bottom and the exhaust of top collection cigarette is made by the control of amount of radiation and free convection amount, it is ensured that the thermal field of ceramic sintering cooling stage and the uniformity of atmosphere.The utility model has very strong practicality and extremely wide application prospect, can effectively improve Production of Ceramics efficiency and yield rate.

Description

A kind of ceramic kiln with cooling control structure
Technical field
The utility model is related to a kind of ceramic kiln with cooling control structure, belongs to ceramic sintering technical field.
Background technology
At present it has been recognized that the process for having considerable influence to burning till quality in art ceramics sintering process is kiln Temperature and furnace atmosphere in stove temperature-rise period are mutually matched relation.Accumulated by long-term practice, people burn for ceramics How to control kiln temperature and atmosphere also to grasp rich experiences into temperature-rise period, but for temperature-fall period research not There is temperature-rise period so deep.In traditional concept, temperature and atmosphere have no effect on porcelain quality in temperature-fall period, but actually with The development of state-of-art, researcher gradually recognizes that the uniformity of atmosphere and thermal field in cooling is also to directly affect glaze The factor of face color development.Even if this result of study also demonstrates modernization kiln when the sensitive glaze of progress is burnt till, finished product Rate is less than 50%, and yields is even more to be less than 20%.
The process of Temperature fall in heating system rear hearth is closed at present because the presence of insulation material can be very slow, is Wicket is opened certain distance after heating process terminates, makes cold sky by raising yield, the cooling means generally used in the industry Gas enters in kiln and then reaches the purpose of quick reduction kiln temperature.It can quickly reduce warm in kiln really by opening the method for wicket Degree, but initial effective influence scope is also only limitted near fire door opening, and the speed of cooling is not by operating personnel's control 's.Simultaneously a large amount of fresh air air can be made to enter in kiln in temperature-fall period, and acutely change the composition of the atmosphere in fire door region, caused Overall kiln atmosphere is out of control and has no uniformity and can say.Come out of the stove from current conventional furnaces, the porcelain of door side it is few into Product occur, and the porcelain glazes of other parts is the characteristics of show male and female face, i.e. glaze both sides residing component in temperature-fall period Deviation is very big.
Utility model content
The purpose of this utility model is to propose a kind of ceramic kiln with cooling control structure, for ceramic sintering process Temperature and atmosphere are uncontrollable during middle cooling, the problem of uneven, and the structure to existing ceramic kiln is improved, and pass through control Heat radiation and gaseous exchange, so as to ensure that in-furnace temperature can meet default temperature reduction technology, are improving ceramic sintering efficiency Under the premise of, it is effectively increased the thermal field uniformity in temperature-fall period.
The utility model proposes the ceramic kiln with cooling control structure, including burner hearth, kiln outer wall, liftable top Lid, heater, collection cigarette hood, controlled admission line, soaking refractory slab and perforate ventilation refractory slab;Described heater is arranged in stove Four walls of thorax, described perforate ventilates refractory slab longitudinal arrangement in burner hearth, and base substrate to be burnt till is placed on perforate ventilation refractory slab;It is described Soaking refractory slab be located at the superiors' base substrate to be burnt till top;The bottom of described burner hearth is provided with controlled admission line, burner hearth Top is provided with liftable top cover, and the top of top cover is provided with collection cigarette hood.
In the above-mentioned ceramic kiln with cooling control structure, described liftable top cover is wedge-shaped top cover, wedge-shaped top cover Cover on the top of burner hearth, or step top cover.
The utility model proposes the ceramic kiln with cooling control structure, its advantage is:
1st, the ceramic kiln of the present utility model with cooling control structure, homogeneous radiation is enclosed by the top of surrounding one, with And the design for the soaking refractory slab further installed, solve in the door opened temperature-fall period that prior art is present, only fire door is opened Mouthful side reaches the condition of cooling, and in stove other regions due to radiation angle it is too small, heat exchange efficiency is low to cause thermal field inside burner hearth Extremely uneven the problem of.
2nd, the top lowering or hoisting gear of the utility model ceramic kiln, can be by programme-control adjustable height, so as to determine Openings of sizes, caloradiance and the intensity of gaseous exchange just can be effectively controlled by the size of opening.Stove when solving cooling The present situation of firer's experience is fully relied in door opening process.
3rd, ceramic kiln of the present utility model, the controlled air inlet in bottom can keep the natural convection stablized and naturally right Heat exchange amount during stream.Radiating simultaneously can make the temperature field that upper cold and lower heat is produced inside burner hearth, when temperature difference increase above burner hearth When, free convection part need not control also can therewith increase in convection current, so as to reduce the temperature difference, the whole thermal field of the design has very strong Self-regulation ability, improve whole system stability.Both promote temperature field in furnace to tend to be uniform at collective effect.
4th, ceramic kiln of the present utility model, the refractory slab that can be ventilated by soaking refractory slab and perforate is mutually combined to realize Temperature-fall period, realizes the function that heterogeneity glaze is fired in same stove by different level.
5th, ceramic kiln of the present utility model, passes through the design of top collection cigarette hood, it can be ensured that firer's operating process In will not be injured by fire door moving process high temperature gas, security is significantly greatly increased.
Therefore the utility model proposes have cooling control structure ceramic kiln, be to existing furnace construction once Improve, with very strong practicality and extremely wide application prospect, Production of Ceramics efficiency and yield rate can be effectively improved, be Ceramic sintering process increases a new control device.
Brief description of the drawings
Fig. 1 be the utility model proposes have cooling control structure ceramic kiln structural representation.
Fig. 2 is having in wedge-shaped top cover folding schematic diagram in the ceramic kiln of cooling control structure, Fig. 2 shown in Fig. 1, (a) closure state is in for wedge-shaped top cover, (b) is that wedge-shaped top cover is in opening.
Fig. 3 is to have step top cover folding schematic diagram in the ceramic kiln of cooling control structure shown in Fig. 1, in Fig. 3, (c) closure state is in for step top cover, (d) is that step top cover is in opening.
In Fig. 1-Fig. 3,1 is the burner hearth in ceramic sintering area, and 2 be kiln outer wall, and 3 be wedge-shaped liftable top cover, and 4 be heating Device, 5 be collection cigarette hood, and 6 be controlled admission line, and 7 be soaking refractory slab, and 8 be perforate ventilation refractory slab, and 9 be step liftable Top cover.
Embodiment
The utility model proposes have cooling control structure ceramic kiln, its structure as shown in figure 1, including burner hearth 1, Kiln outer wall 2, liftable top cover 3, heater 4, collection cigarette hood 5, controlled admission line 6, soaking refractory slab 7 and perforate ventilation canopy On plate 8.Heater 4 is arranged in four walls of burner hearth 1, and perforate ventilates the longitudinal arrangement of refractory slab 8 in burner hearth 1, and base substrate to be burnt till is placed in On perforate ventilation refractory slab 8.Soaking refractory slab 7 is located at the top of the superiors' base substrate to be burnt till.The bottom of burner hearth 1 is provided with controlled air inlet pipe Road 6, the top of burner hearth 1 is provided with liftable top cover 3, and the top of liftable top cover 3 is provided with collection cigarette hood 5.
In the above-mentioned ceramic kiln with cooling control structure, liftable top cover 3 can be wedge-shaped top cover, such as institute in Fig. 2 Show, wedge-shaped top cover is covered on the top of burner hearth, wherein, Fig. 2 (a) is that wedge-shaped top cover is in closure state, and Fig. 2 (b) is wedge-shaped top cover In opening.Liftable top cover can also be step top cover, as shown in figure 3, wherein Fig. 3 (c) is at step top cover In closure state, Fig. 3 (d) is that step top cover is in opening.
Below in conjunction with accompanying drawing, structure of the present utility model is described further, it is pointed out that of the present utility model Structure is not limited only to shown electrical kiln, is equally applicable to traditional wood kiln and gas kiln.It lifts top cover can be by a variety of joint forms Constitute, to tackle different cooling conditions.In general, wedge-shaped top cover can meet faster radiating, and stepped ramp type top cover can be with More accurately keep the uniformity of radiation heat flux.
After the completion of kiln is normally fired, lifting top cover 3 is kept to be located at the state closed, now heater 4 works on, by Temperature in step reduction burner hearth.After heater 4 is completely closed, slow lifting top cover, as shown in accompanying drawing 2 or accompanying drawing 3.Lift top cover Heat passage is formed between 3 and kiln outer wall 2, heat radiation is formed.Bottom inflow 6, and top collection cigarette hood are opened simultaneously 5, form forced convection from bottom to top.So that in-furnace temperature keeps required rate of temperature fall.
As furnace temperature is reduced, lifting top cover 3 will also be lifted further, and the air inflow of inlet end 6 also accordingly increases, and continue to tie up Hold required rate of temperature fall.
By heat radiation, forced convection, the collective effect of free convection, can not only make furnace temperature by required technique it is controlled under Drop, while good thermal field uniformity and atmosphere evenness can also be kept.
Open lifting top cover 3 during, can also keep heater 4 be in opening, come make up heat dissipation capacity by The disturbed condition of external environment influence.
Required thermal field and atmosphere evenness are controlled by soaking refractory slab 7 and perforate being applied in combination for refractory slab 8 of ventilating.One As for, soaking refractory slab 7 is located at the superiors so that external radiating surface temperature is consistent;Perforate ventilation refractory slab 8 is located at other layers, protects The path of the internal free convection of card.
Furnace design of the present utility model is that top cover lifts open-close ways, after top cover is substantially higher than furnace roof, can be outwarded winding The work for being fed and being discharged.And it is high that top cover jacking system carries out lifting by the combination or other manner of motor leading screw The control of degree.Burner hearth bottom is designed with inlet duct (such as self-priming valve, blower fan, source of the gas etc.), and the inlet duct is controlled, Air inflow size can be adjusted on request.External collection cigarette hood is designed with above kiln, high-temperature gas can be imported and arranged Air pipe.
During normal firing, lifting top cover is in closure state, is carried out by normal burning process.Cool when ceramic kiln enters During technique, cooling rate is maintained by way of controlling heater power first, until heater is progressively closed.By institute above State, kiln, which continues Temperature fall speed, to slow down gradually.Now by drive device lifting step by step top cover, make top cover and kiln top Certain gap is produced between layer.Because in-furnace temperature is higher, heat radiation can externally be produced by the gap.Simultaneously, bottom The air inlet in portion can also be opened, heat convection ability in increase stove.As fire box temperature constantly declines, radiation intensity and free convection Intensity can all decline, and especially radiation intensity is directly proportional with the biquadratic of temperature, so needing more heat exchanger channels to tie up Hold rate of temperature fall.Bigger radiation heat transfer area is formed by improving constantly furnace top cover position, and is stepped up inlet air flow Amount, improves convection heat transfer intensity.This both interaction just effectively can reduce fire box temperature by technique.
Silicon carbide deck, which is set, in further design, in stove can also have influence on the uniformity of burner hearth thermal field.Carborundum Refractory slab is divided into soaking plate and perforate vent board, and soaking plate makes whole radiating surface keeping temperature one using the high heat conductance of carborundum Cause, and perforate ventilation refractory slab can then make the temperature homogeneity between the abundant convection current of furnace atmosphere, increase inner chamber.
During furnace top cover is opened, collection cigarette hood air draft can also be opened.Particularly hot stage, air outlet temperature compared with Height, the Cryogenic air that air draft can largely suck neighbouring environment is mixed, it is ensured that runner internal temperature safety, while also ensureing Operate the safety of the personnel such as firer.

Claims (3)

1. it is a kind of have cooling control structure ceramic kiln, it is characterised in that including burner hearth, kiln outer wall, liftable top cover, Heater, collection cigarette hood, controlled admission line, soaking refractory slab and perforate ventilation refractory slab;Described heater is arranged in burner hearth Four walls, described perforate ventilates refractory slab longitudinal arrangement in burner hearth, and base substrate to be burnt till is placed on perforate ventilation refractory slab;Described Soaking refractory slab is located at the top of the superiors' base substrate to be burnt till;The bottom of described burner hearth be provided with controlled admission line, burner hearth it is upper Portion is provided with liftable top cover, and the top of top cover is provided with collection cigarette hood.
2. the ceramic kiln as claimed in claim 1 with cooling control structure, it is characterised in that wherein described liftable Top cover is wedge-shaped top cover, and wedge-shaped top cover is covered on the top of burner hearth.
3. the ceramic kiln as claimed in claim 1 with cooling control structure, it is characterised in that wherein described liftable Top cover is step top cover, and step top cover is covered on the top of burner hearth.
CN201720203776.2U 2017-03-03 2017-03-03 A kind of ceramic kiln with cooling control structure Active CN206583296U (en)

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CN206583296U true CN206583296U (en) 2017-10-24

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106885469A (en) * 2017-03-03 2017-06-23 杭州志在材料科技有限公司 A kind of ceramic kiln with cooling control structure
CN109387084A (en) * 2018-11-08 2019-02-26 安徽龙磁科技股份有限公司 A kind of magnetic shoe stove based on Internet of Things control

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106885469A (en) * 2017-03-03 2017-06-23 杭州志在材料科技有限公司 A kind of ceramic kiln with cooling control structure
CN109387084A (en) * 2018-11-08 2019-02-26 安徽龙磁科技股份有限公司 A kind of magnetic shoe stove based on Internet of Things control
CN109387084B (en) * 2018-11-08 2023-11-10 安徽龙磁科技股份有限公司 Magnetic shoe kiln based on control of Internet of things

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