CN103791490B - Oxygen-enriched atmosphere ceramic sintering system and ceramic sintering method - Google Patents
Oxygen-enriched atmosphere ceramic sintering system and ceramic sintering method Download PDFInfo
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- CN103791490B CN103791490B CN201410064120.8A CN201410064120A CN103791490B CN 103791490 B CN103791490 B CN 103791490B CN 201410064120 A CN201410064120 A CN 201410064120A CN 103791490 B CN103791490 B CN 103791490B
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- oxygen
- enriched
- enriched air
- air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Tunnel Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to an oxygen-enriched atmosphere ceramic sintering system comprising an oxygen-enriched air pipeline I and an oxygen-enriched air pipeline II which are connected with two sides of a roller kiln, respectively. Oxygen-enriched air is divided into two parts, wherein one part is introduced into the oxygen-enriched air pipeline I and is mixed with fuel gas and then the mixed gas enters one side of the roller kiln for combustion so as to form heating air flow; the other part is introduced into the oxygen-enriched air pipeline II, then enters the other side of the roller kiln and forms convection with the heating air flow. The oxygen-enriched atmosphere ceramic sintering system can be used for effectively enhancing the thermal efficiency of the kiln and improving the performance of ceramic products.
Description
Technical field
The invention belongs to Industrial Stoves combustion control technology field, particularly to a kind of pottery oxygen-enriched atmosphere firing system and
The method of Low fire ceramic.
Background technology
Industrial Stoves are the Thermal Equipments of most critical and energy consumption maximum in household porcelain production, account for the 1/ of national total energy consumption
4, the energy-saving and emission-reduction of therefore ceramic industry are significant.Normal air conduct is mostly adopted at present during ceramic firing
Combustion-supporting medium, the heat energy Low fire ceramic being produced using fuel combustions such as natural gass.O in normal air2Content only accounts for 20.93%, and
79% n2And noble gases typically make fuel and the collision probability of oxygen greatly reduce just as diluent, significantly on a small quantity
Reduce fuel economy.90% so in China's airx, 85% co2, 80% rox(dust) and 50% noxPollution all comes
From Industrial Boiler, kiln.China's ceramic green yield occupies very big proportion in international market, but there is high energy consumption, class simultaneously
Low, resource consumption is big and the problems such as environmental pollution is serious.Therefore how to improve fuel economy, reduce environmental pollution, with
The quality of Shi Gaishan domestic ceramics is ceramic industry problem demanding prompt solution.
The ceramic kiln thermal efficiency depends primarily on the factors such as fuel, kiln and combustion-supporting medium, does not change in ceramic kiln
In the case of, the higher thermal efficiency of ceramic kiln to be given controls o in combustion-supporting medium it is necessary to strict2Content adopts oxygen rich air
Atmosphere burns till.It is exactly to adopt o that so-called oxygen-enriched atmosphere burns till2The gas that content is more than 20.93% is next combustion-supporting.Oxygen-enriched atmosphere burns till and can show
Write ground to improve the ceramic kiln thermal efficiency, burning velocity flame temperature being greatly improved, accelerating flame, improve the complete of fuel
Combustion rate and reduction pollution.Oxygen-enriched combustion technology is applied to burning till of domestic ceramics and can significantly decrease energy resource consumption.Though
So oxygen-enriched combustion technology haves many advantages, such as above, but is likely in actual applications the too high problem of local temperature make
Heating power type noxGenerate in a large number and bring serious threat to environment, and it is uneven, thus affecting day to easily cause roller-way kiln temperature field
Burn till quality with ceramic.
Content of the invention
The technical problem to be solved is for deficiency above-mentioned present in prior art, provides a kind of pottery rich
Oxygen atmosphere firing system, its structure is simple, and can improve furnace heat efficiency using this system Low fire ceramic, effectively strengthens in kiln
The uniformity in temperature field, thus improve the performance of ceramic.
Solve present invention problem and be employed technical scheme comprise that this ceramic oxygen-enriched atmosphere firing system, it includes oxygen-enriched
Air pipe line and oxygen-enriched air pipeline, oxygen-enriched air pipeline and oxygen-enriched air pipeline connect roller kilns both sides respectively, rich
Oxygen air is divided into two parts, and a part is passed through oxygen-enriched air pipeline, and enters the burning of roller kilns side after fuel mixing, is formed
Heating air-flow；Remaining oxygen-enriched air is passed through oxygen-enriched air pipeline and enters roller kilns opposite side, forms convection current with heating air-flow.
The present invention also provides the ceramic oxygen-enriched atmosphere process for calcining using said system, comprises the following steps: burns in kiln
Mixed with air using high purity oxygen gas during one-tenth, form oxygen-enriched air；Then by the oxygen-enriched sky of oxygen-enriched air total amount 90-95v%
Gas is passed through described oxygen-enriched air pipeline, and enters the burning of roller kilns side after fuel mixing, forms heating air-flow；Remaining 5-
The oxygen-enriched air of 10v% is passed through described oxygen-enriched air pipeline and enters roller kilns opposite side, forms convection current with heating air-flow.This
Bright employing oxygen-enriched air is combustion-supporting medium, and oxygen-enriched air is divided into two parts to be passed through in roller kilns, realizes convection current mixed combustion,
Improve fuel economy, and so that heat in roller kilns is more evenly distributed, thus being conducive to burning till the ceramic of greater homogeneity
Product.
Preferably, described mixed with air by high purity oxygen gas prepared by pressure swing adsorption method after the oxygen-enriched air that obtains oxygen-containing
Measure as 24-35v%.
By such scheme, described fuel is preferably natural gas.
Present invention additionally comprises according to the ceramic of said method preparation, this ceramic rupture strength is 65-70mpa,
Density is 2.35-2.40g/cm3.
The invention has the beneficial effects as follows: efficiently solve and adopt normal air in prior art as combustion-supporting medium, difficult
With unburned fuel component, and fume emission causes the problem of a large amount of loss of heat, with oxygen-enriched atmosphere as combustion-supporting medium, using portion
Divide the convection type of oxygen-enriched combustion-supporting medium and combustion flame so that the unburned oxygen-enriched combustion-supporting that completely fuel and opposite spray into is situated between
Matter diffusion combustion, it is to avoid oxygen-enriched combustion-supporting medium and fuel together add the problem causing flame local temperature too high, improve kiln
The uniformity in interior temperature field.Furnace heat efficiency can be made to improve 8-12% using present invention pottery oxygen-enriched atmosphere firing system, and institute
The ceramic rupture strength of preparation reaches 65-70mpa, and density reaches 2.35-2.40g/cm3(use air as in prior art
Combustion-supporting medium, ceramic rupture strength is 40mpa, and density is 2.20g/cm3).
Brief description
Fig. 1 is the structural representation of pottery oxygen-enriched atmosphere firing system of the present invention；
Fig. 2 is the sem picture of the ceramic prepared by the embodiment of the present invention one；
Fig. 3 is the sem picture of the ceramic prepared by embodiment two；
Fig. 4 is the sem picture of the ceramic prepared by embodiment three.
In figure: 1 oxygen-enriched air pipeline stop valve；2 oxygen-enriched air pipelines；3 oxygen-enriched air proportion adjustment executors；
4 oxygen-enriched air line-pressure sensor；5 oxygen-enriched air piping flow controllers；6 oxygen-enriched air pipelines；7 is oxygen-enriched
Air pipe line flow controller；8 oxygen-enriched air pipeline stop valves；9 oxygen-enriched air pipelines；10 oxygen-enriched air jets
Device；11 gas pipelines；12 gas pipeline stop valves；13 natural gas tube way solenoid valves；14 gas pipeline ratios
Example regulating valve；15 Air combustion with oxygen enrichment devices；16 roller kilns kiln body；17 roller kilns transmission roller channels；18 refractory slabs；19 systems
Product.
Specific embodiment
For making those skilled in the art more fully understand technical scheme, below in conjunction with the accompanying drawings the present invention is made into
One step describes in detail.
The ceramic oxygen-enriched atmosphere firing system that the present invention provides, its structure is as shown in figure 1, specifically with variable-frequency governor control
The rotating speed of combustion fan processed, is controlled the flow of source of oxygen, the two is mixed with gas mixer oxygen-enriched sky with effusion meter
Gas, opens oxygen-enriched air pipeline stop valve (1), and oxygen-enriched air passes through oxygen-enriched air pipeline (2), the execution of oxygen-enriched air proportion adjustment
Device (3), oxygen-enriched air line-pressure sensor (4), then pass through respectively to adjust oxygen-enriched air piping flow controller (5), oxygen-enriched
Oxygen-enriched air is divided into two large divisions by air pipe line flow controller (7), and a portion includes 90-95v% oxygen-enriched air,
Another part includes 5-10v% oxygen-enriched air；And open gas pipeline stop valve (12), control to adjust gas pipeline ratio
Regulating valve (14) obtains the natural gas of desired flow, and natural gas passes through gas pipeline (11), natural gas tube way solenoid valve (13),
And it is mixed in Air combustion with oxygen enrichment device (15) outlet with a part of oxygen-enriched air (90-95v%) being passed through by oxygen-enriched air pipeline (6)
After combination burning, enter by the roller kilns (16) of refractory material laying；Another part oxygen-enriched air (5-10v%) passes through oxygen-enriched air
Pipeline stop valve (8) enters roller kilns opposite side through oxygen-enriched air pipeline (9), then by oxygen-enriched air ejector (10), real
The now convection type of part oxygen-enriched combustion-supporting medium and combustion flame, wherein burner (5) and oxygen-enriched air ejector (10) be in
Existing opposite arranged crosswise, the heat that fuel combustion produces is used for the sintering of ceramic (19), and ceramic is located at roller kilns
On the upper refractory slab (18) placed of transmission roller channel (17).
Oxygen-enriched air of the present invention is mixed to get with air by high purity oxygen gas, and its purity is 24-35v%.
Embodiment one
With said components as raw material, through ball milling, compressing obtain biscuit.Preparing oxygen content by pressure swing adsorption method is
The oxygen-enriched air of 25v%, the wherein oxygen-enriched air of 95v% is mixed with fuel by Air combustion with oxygen enrichment device, burn entrance roller-way
In kiln, other 5v% oxygen-enriched air is entered in roller kilns in oxygen-enriched air ejector, realizes part oxygen-enriched combustion-supporting medium and burning
The convection type of flame is so that the unburned oxygen-enriched combustion-supporting Medium Diffusion that completely fuel and opposite spray into is burnt, it is to avoid oxygen-enriched
Combustion-supporting medium and fuel together add the problem causing flame local temperature too high.Advantageously burning till in ceramic.Fire
Flame temperature is 1150 DEG C.
Gained ceramic is detected, as shown in Fig. 2 its microstructure is fine and close, distribution of each phase is equal for its sem picture
Even, its rupture strength is 68.00mpa, and density is 2.35g/cm3.Furnace heat efficiency improves 8%.
Embodiment two
With said components as raw material, through ball milling, compressing obtain biscuit.Preparing oxygen content by pressure swing adsorption method is
The oxygen-enriched air of 28v%, the 93v% of oxygen-enriched air is mixed with oxygen-enriched air fuel by burner, burns in entrance roller kilns,
The oxygen-enriched air of other 7v% is sent in roller kilns in oxygen-enriched air ejector, realizes part oxygen-enriched combustion-supporting medium and burning fire
The convection type of flame is so that the burning of the unburned oxygen-enriched combustion-supporting Medium Diffusion that completely fuel and opposite spray into, it is to avoid oxygen-enriched help
Combustion medium together adds, with fuel, the problem causing flame local temperature too high.Advantageously burning till in ceramic.Flame
Temperature is 1200 DEG C.
Gained ceramic is detected, its sem photo is as shown in figure 3, oxygen-enriched atmosphere compared with Fig. 2 oxygen content 25v%
Burnt product, its structural compactness and acicular crystal quantity substantially increase, thus giving material higher intensity, its anti-folding is strong
Spend for 69.00mpa, density is 2.38g/cm3.Furnace heat efficiency improves 10%.
Embodiment three
With said components as raw material, through ball milling, compressing obtain biscuit.Preparing oxygen content by pressure swing adsorption method is
The oxygen-enriched air of 30v%, the oxygen-enriched air of 90v% is mixed with fuel by Air combustion with oxygen enrichment device, burns in entrance roller kilns,
Other 10v% oxygen-enriched air is entered in roller kilns in oxygen-enriched air ejector, realizes part oxygen-enriched combustion-supporting medium and combustion flame
Convection type so that the unburned oxygen-enriched combustion-supporting Medium Diffusion that completely fuel and opposite spray into burning, it is to avoid oxygen-enriched combustion-supporting
Medium and fuel together add the problem causing flame local temperature too high.Advantageously burning till in ceramic.Flame temperature
Spend for 1350 DEG C.
Gained ceramic is detected, its sem photo is as shown in figure 4, be respectively compared with Fig. 2 and Fig. 3 oxygen content
The oxygen-enriched atmosphere burnt product of 25v%, 28v%, its structural compactness and acicular crystal quantity substantially increase, thus giving material
High intensity, its rupture strength is 69.50mpa, and density is 2.40g/cm3.Furnace heat efficiency improves 12%.
By the above detailed description to the embodiment of the present invention it will be appreciated that the present invention solves the combustion of conventional method Low fire ceramic
The uneven situation of material incomplete combustion, kiln temperature field in furnace, the ceramic simultaneously prepared is functional, and rupture strength reaches
65-70mpa, density reaches 2.35-2.40g/cm3.
It is understood that the embodiment of above principle being intended to be merely illustrative of the present and the exemplary enforcement adopting
Mode, but the invention is not limited in this.For those skilled in the art, in the essence without departing from the present invention
In the case of god and essence, various modifications and improvement can be made, these modifications and improvement are also considered as protection scope of the present invention.
Claims (5)
1. a kind of pottery oxygen-enriched atmosphere firing system is it is characterised in that including oxygen-enriched air pipeline and oxygen-enriched air pipeline, rich
Oxygen air pipe line and oxygen-enriched air pipeline connect roller kilns both sides respectively, and oxygen-enriched air is divided into two parts, and a part is passed through richness
Enter the burning of roller kilns side after oxygen air pipe line, and fuel mixing, form heating air-flow；Remaining oxygen-enriched air is passed through oxygen-enriched
Air pipe line enters roller kilns opposite side, forms convection current with heating air-flow.
2. a kind of pottery oxygen-enriched atmosphere process for calcining is it is characterised in that being burnt till using oxygen-enriched atmosphere ceramic described in claim 1 and being
System Low fire ceramic, comprises the following steps: is mixed with air using high purity oxygen gas in kiln sintering process, forms oxygen-enriched air；
Then the oxygen-enriched air of oxygen-enriched air total amount 90-95v% is passed through described oxygen-enriched air pipeline, and enters roller-way after fuel mixing
Burning in kiln side, forms heating air-flow；The oxygen-enriched air of remaining 5-10v% is passed through described oxygen-enriched air pipeline and enters roller kilns
Opposite side, forms convection current with heating air-flow.
3. pottery oxygen-enriched atmosphere process for calcining according to claim 2 is it is characterised in that described oxygen-enriched air oxygen content is
24-35v%.
4. pottery oxygen-enriched atmosphere process for calcining according to claim 2 is it is characterised in that described fuel is natural gas.
5. the ceramic according to prepared by the arbitrary described ceramic oxygen-enriched atmosphere process for calcining of claim 2-4, its feature exists
It is 65-70mpa in rupture strength, density is 2.35-2.40g/cm3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410064120.8A CN103791490B (en) | 2014-02-25 | 2014-02-25 | Oxygen-enriched atmosphere ceramic sintering system and ceramic sintering method |
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| CN201410064120.8A CN103791490B (en) | 2014-02-25 | 2014-02-25 | Oxygen-enriched atmosphere ceramic sintering system and ceramic sintering method |
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| CN103791490B true CN103791490B (en) | 2017-01-25 |
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| CN104949505A (en) * | 2015-05-25 | 2015-09-30 | 绥阳县华夏陶瓷有限责任公司 | Oxygen-enriched combustion roller kiln system |
| CN106197053B (en) * | 2016-08-26 | 2018-10-19 | 温书强 | A kind of pottery kiln temperature monitoring regulating system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1166470A (en) * | 1997-03-07 | 1997-12-03 | 辛笑 | Fusion-sprayed composite ceramic particle and its preparation process |
| JP2001058877A (en) * | 1999-08-24 | 2001-03-06 | Osaka Prefecture | Firing of ceramic material |
| CN101045622A (en) * | 2007-05-08 | 2007-10-03 | 江西永华瓷业有限公司 | Method for oxygen-enriched burning of ceramic furnace |
| CN101445372B (en) * | 2008-12-15 | 2012-05-23 | 王儒林 | Method for applying membrane oxygen enrichment technology in roller kiln |
| CN102997654B (en) * | 2012-12-10 | 2015-04-08 | 武汉理工大学 | Oxygen-enriched combustion domestic ceramic roller kiln waste-heat utilization hot-air preheating system |
| CN203190442U (en) * | 2013-02-27 | 2013-09-11 | 唐山纳川节能设备制造有限公司 | Oxygen enrichment combustion-supporting energy-saving device of ceramic kiln |
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