CN101445372B - Method for applying membrane oxygen enrichment technology in roller kiln - Google Patents
Method for applying membrane oxygen enrichment technology in roller kiln Download PDFInfo
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- CN101445372B CN101445372B CN2008102337264A CN200810233726A CN101445372B CN 101445372 B CN101445372 B CN 101445372B CN 2008102337264 A CN2008102337264 A CN 2008102337264A CN 200810233726 A CN200810233726 A CN 200810233726A CN 101445372 B CN101445372 B CN 101445372B
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- oxygen
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- enriched 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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Abstract
The invention discloses a method for applying the membrane oxygen enrichment technology in a roller kiln, which is realized through the technical scheme: air is pumped by air input blower through a filter into an oxygen enrichment membrane device, and is transformed into oxygen enriched air under the action of pressure difference; the oxygen enriched air is sent by an air pump to a gas-water separation system and a dehumidification system, then enters a pressure stabilizing system, and finally after being preheated by a heater is sent by an oxygen enrichment nozzle to the upper layer and the lower layer of the manufactured ceramic tile; combustible gas is taken as fuel; the air input direction of the gas fuel is vertical to the air input direction of the oxygen enriched air; the gas fuel is distributed in burner high-speed injection kilns on two sides of the kiln body; and thermocouples distributed in different box bodies are used for testing the temperature in the kiln furnace when necessary, and sending signals to an adjustor which makes comparison between the signals and data set in advance, and issues instructions to an electric actuator to control the divergence of a combustible gas adjusting valve, thereby adjusting the feeding amount of the combustible gas to ensure that the temperature in the kiln remains at the required level.
Description
Technical field
The present invention relates to the Production of Ceramics field, more specifically relate to a kind of in roller kilns the method for applying membrane oxygen enrichment technology.
Background technology
Roller kilns are that commonplace key equipment is used in the Production of Ceramics field, generally adopt double-deck kiln type, the heat-resisting roller of middle radiation, and the kind of drive has chain drive, gear drive etc. multiple.The burning of control roller kilns be directly connected to ceramic product quality, consumes energy what and to the influence of environment because oxygen only accounts for 20.94% in the normal air, nitrogen accounts for 78.09%; Regional oxygen content at height above sea level is lower, in order to improve efficiency of combustion, in combustion process, needs to feed a large amount of combustion airs; But about 1/5 of a duty gas total amount of real participation burning; And the nitrogen of duty gas total amount 4/5 not only can not burn with other inert gases, can absorb great amount of heat on the contrary, along with flue gas enters in the atmosphere; Not only cause the waste and the environmental pollution of resource; And heat skewness in kiln that bigger intake also can make burning produce, it is irregular to cause ceramic product to shrink, and quality is unstable.
The oxygen-enriched combustion-supporting technology is exactly to adopt than the hyperoxic oxygen-enriched air of conventional air to participate in burning; Can effectively improve advantages such as efficiency of combustion, raising flame temperature, the burning velocity of accelerating, increase heat utilization efficiency, reduction smoke discharge amount; Can reduce fuel uses; Reduce combustion-supporting gas feeding amount, play the effect of energy-saving and emission-reduction.Membrane oxygen enrichment technology equipment is simple, easy to operate, safety, startup are fast, free from environmental pollution; Energy-saving effect is remarkable; Its basic principle is: it is different to utilize each constituent in the air to see through the infiltration rate of polymeric membrane for separation, under the driving of pressure differential, makes oxygen preferentially pass through film; Thereby obtain higher and the oxygen-enriched air that nitrogen content is relatively low of oxygen concentration; Join combustion system, improve efficiency of combustion, membrane oxygen enrichment technology is existing the application on boiler, chemical industry and metallurgical furnace; Because it is relatively stricter to the requirement of burning condition and Temperature Distribution that roller kilns are produced pottery, the instance of membrane oxygen enrichment technology successful Application in roller kilns does not appear in the newspapers and discloses.Existing roller kilns adopt film oxygen enriching can have following problem: adopt after the oxygen-enriched air; Combustion air air intake pressure reduces; Air current flow in the kiln weakens, and the heat transmission that causes the roller kilns internal combustion to produce is slow, and furnace gas is low to the heat exchange efficiency of product; Be unfavorable for that clinkering zone vertically is formed with rule, controllable thermograde in the kiln, firing period prolongs; Because of the roller-way furnace air is mobile little, transverse temperature difference is big in the kiln, and the product size deviation of producing is big, is unfavorable for quality control.
Summary of the invention
In order to solve the problem that exists in the background technology; The invention provides a kind of in roller kilns the method for applying membrane oxygen enrichment technology; Adopt this method successfully membrane oxygen enrichment technology to be applied in the roller kilns; Reduce the cost that utilizes roller kilns to produce ceramic tile greatly, enhance productivity, the objective of the invention is to realize through following technological means:
The air inlet blower fan passes through air in the filter suction oxygen permeable membrane device; Under action of pressure, make oxygen-enriched air; Utilize air pump to deliver to gas-water separation system, systems for moisture removal to oxygen-enriched air; Get into voltage-stabilizing system, pass through the heater preheating at last, vertically send into the upper and lower of institute's firing ceramics brick through the oxygen enrichment nozzle along roller kilns respectively; The employing fuel gas acts as a fuel; The gaseous fuel airintake direction is vertical with the oxygen-enriched air airintake direction; Gaseous fuel adopts the burner that is distributed in kiln body both sides to spray at a high speed in the kiln, and with the oxygen-enriched air burning that vertically gets into, two strands of vertical gases impact each other; Form Intensification of Convection Heat Transfer; The heat that burning is produced transmits at the roller kilns lateral divergence, reaches evenly the laterally purpose of furnace temperature, can not occur in the kiln transverse temperature difference product size deviation big, that produce big, be unfavorable for problem such as quality control.The present invention adopts temperature in the thermocouple detection at any time kiln that is distributed in the different casings; And signal passed to adjuster; Adjuster contrast preliminary setting data and signal issue instructions to YE, the aperture of control fuel gas control valve; To regulate the amount of sending into of fuel gas, make kiln temperature be in required level; The aperture and the temperature of fuel gas control valve are mated automatically and reasonably; Make the interior system of roller kilns be in optimal state; In roller way kiln under the prerequisite of air current flow, with in the stove everywhere temperature maintenance guaranteeing that good product quality, energy consumption are low, and the little level of temperature fluctuation.
For fuel gas can fully be stirred with transverse temperature in the even kiln with oxygen-enriched air, the burner that gaseous fuel is sent in the kiln is preferably the divergence expression gas burner.
In order to make imflammable gas form intense impact with oxygen-enriched air; Make the horizontal gas of roller kilns fully stir the formation Intensification of Convection Heat Transfer; Imflammable gas of the present invention is preferably the coal gas that contains other incombustible gas; Incombustible gas in the coal gas flows in whole roller kilns after vertically colliding with other non-flammable compressive gas in the oxygen-enriched air; Promote the gas stream in the stove circulation, heat vertically evenly transmits at roller kilns, can effectively avoid fuel gas fully by burning cause with the oxygen-enriched air of vertically entering mutually the impulse force degree weaken the variety of issue that causes that the transverse temperature skewness causes in the kiln mass defect and oxygen-enriched air admission pressure reduce to bring; Air current flow weakens the vertical transmission of the interior heat of the roller kilns that cause slowly in the solution kiln, defectives such as furnace gas is low to the heat exchange efficiency of product, firing period prolongation.
The invention has the beneficial effects as follows:
1. because oxygen-enriched air has improved efficiency of combustion, and the combustion air air inflow significantly reduces, and smoke discharge amount has reduced more than 50%, the smoke exhaust heat loss reduces, and not only energy savings reduces production costs greatly, also is of value to the reduction atmosphere pollution;
2. owing to adopt fuel gas to act as a fuel; The gaseous fuel airintake direction is vertical with the oxygen-enriched air airintake direction; Two strands of vertical gases impact each other; Form Intensification of Convection Heat Transfer; The heat that burning is produced transmits at the roller kilns lateral divergence; Can be evenly horizontal furnace temperature, can not occur in the kiln transverse temperature difference product size deviation big, that produce big, be unfavorable for problem such as quality control;
3. adopt the coal gas that contains other incombustible gas to act as a fuel; Incombustible gas in the coal gas can be with the formation intense impact of vertically colliding of other non-flammable compressive gas in the oxygen-enriched air; The horizontal gas of roller kilns is fully stirred the formation Intensification of Convection Heat Transfer; Promoted the gas stream in the stove circulation; And heat can vertically evenly transmit at roller kilns; Can effectively avoid fuel gas fully by burning cause with the oxygen-enriched air that vertically gets into mutually the impulse force degree weaken the variety of issue that causes that the transverse temperature skewness causes in the kiln mass defect and oxygen-enriched air admission pressure reduce to bring, solve in the kiln air current flow weaken in the roller kilns that cause heat vertically transmit slow, defectives such as furnace gas is low to the heat exchange efficiency of product, firing period prolongation.
4. there is not nitrogen content of thermal radiation capability to reduce in the oxygen-enriched air; Strengthened the heat radiation power of furnace gas to product; Accelerate the exchange rate of furnace gas to product; Shorten firing period; On existing equipment, significantly promoted the output of product; Because furnace gas to the enhancing of product thermal radiation capability, makes firing temperature also reduce, reduced energy consumption simultaneously;
5. owing to adopt temperature and coal gas automatic regulating system, the roller kilns system is in best duty all the time.
Description of drawings
Fig. 1 produces the schematic flow sheet of applying membrane oxygen enrichment technology in the ceramic process for roller kilns;
Fig. 2 is applied in back oxygen-enriched air and fuel gas working state schematic representation in the roller kilns for adopting method of the present invention with membrane oxygen enrichment technology.
Fig. 3 is a divergence expression gas burner structural representation of the present invention.
The specific embodiment
Embodiment 1:
Reaching 130 meters long roller kilns of ceramic company with the Yimen meaning is example, and roller kilns are divided into 60 joints, long 2.16 meters of every joint; The air inlet blower fan passes through air in the filter suction oxygen permeable membrane device; Under action of pressure, make oxygen concentration and be 32% oxygen-enriched air, utilize air pump to deliver to gas-water separation system, systems for moisture removal to oxygen-enriched air, get into voltage-stabilizing system; Pass through the heater preheating at last, vertically send into the upper and lower of institute's firing ceramics brick through the oxygen enrichment nozzle along roller kilns respectively; Employing coal gas acts as a fuel; The gas inlet direction is vertical with the oxygen-enriched air airintake direction, and coal gas adopts the divergence expression gas burner that is distributed in kiln body (1) both sides to spray at a high speed in the kiln, adopts temperature in the thermocouple detection at any time kiln that is distributed in the different casings; And signal passed to adjuster (3); Adjuster contrast preliminary setting data and signal issue instructions to YE, the aperture of control fuel gas control valve; To regulate the amount of sending into of fuel gas, make kiln temperature reach required level rapidly; The aperture and the temperature of fuel gas control valve are mated automatically and reasonably; Make the interior system of roller kilns be in optimal state; In roller way kiln under the prerequisite of air current flow, with in the stove everywhere temperature maintenance guaranteeing that good product quality, energy consumption are low, and the little level of temperature fluctuation.
Adopt method of the present invention to realize that temperature is following in the kiln behind the film oxygen enriching everywhere:
Each technical indicator and data are following:
The oxygen-enriched air flow is: 1700NM
3/ h, output is: 8500m
2/ day; The minimum air intake pressure of oxygen-enriched air is reduced to 0.2MPa, consumption coal gas amount 6500m
3/ day, the product size deviation of burning till is less than 1.
Before adopting non-membrane oxygen enrichment technology, temperature is following everywhere in the kiln:
Each technical indicator and data are following:
Combustion air flow is: 6800NM
3/ h, output is: 5500m
2/ day; The minimum air intake pressure of combustion air is 0.8MPa, and the product size deviation of burning till is less than 1.
Embodiment 2:
Reaching 97 meters long roller kilns of ceramic company with Yimen meaning is example, and the concrete application mode of the membrane oxygen enrichment technology that is adopted is with embodiment 1, adopts method of the present invention to realize that temperature is following in the kiln behind the film oxygen enriching everywhere:
Each technical indicator and data are following:
The oxygen-enriched air flow is: 1200NM
3/ h, output is: 5500m
2/ day; The minimum air intake pressure of oxygen-enriched air is reduced to 0.2MPa, consumption coal gas amount 5100m
3/ day, the product size deviation of burning till is less than 1.
Before adopting non-membrane oxygen enrichment technology, temperature is following everywhere in the kiln:
Each technical indicator and data are following:
Combustion air flow is: 4800NM
3/ h, output is: 3500m
2/ day; The minimum air intake pressure of combustion air is 0.8MPa, and the product size deviation of burning till is less than 1.
Claims (2)
1. method of in roller kilns, utilizing membrane oxygen enrichment technology is characterized in that: the air inlet blower fan through in the filter suction oxygen permeable membrane device, makes oxygen-enriched air to air under action of pressure; Utilize air pump to deliver to gas-water separation system, systems for moisture removal to oxygen-enriched air, get into voltage-stabilizing system, pass through the heater preheating at last, send into the upper and lower of institute's firing ceramics brick through the oxygen enrichment nozzle respectively; Employing contains the coal gas of other incombustible gas as gaseous fuel, and the gaseous fuel airintake direction is vertical with the oxygen-enriched air airintake direction, and gaseous fuel adopts the burner that is distributed in kiln body both sides to spray in the kiln at a high speed; Utilization is distributed in temperature in the thermocouple detection at any time kiln in the different casings, and signal is passed to adjuster.
2. a kind of method of in roller kilns, utilizing membrane oxygen enrichment technology according to claim 1 is characterized in that: the said burner that is distributed in kiln body both sides is the divergence expression gas burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102337264A CN101445372B (en) | 2008-12-15 | 2008-12-15 | Method for applying membrane oxygen enrichment technology in roller kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102337264A CN101445372B (en) | 2008-12-15 | 2008-12-15 | Method for applying membrane oxygen enrichment technology in roller kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101445372A CN101445372A (en) | 2009-06-03 |
| CN101445372B true CN101445372B (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008102337264A Expired - Fee Related CN101445372B (en) | 2008-12-15 | 2008-12-15 | Method for applying membrane oxygen enrichment technology in roller kiln |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103791490B (en) * | 2014-02-25 | 2017-01-25 | 武汉理工大学 | Oxygen-enriched atmosphere ceramic sintering system and ceramic sintering method |
| CN109052999B (en) * | 2018-09-11 | 2021-07-02 | 营口益嘉镁业科技有限公司 | Process mechanism for roasting high-purity magnesium oxide by membrane method oxygen production and oxygen enrichment combustion supporting |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1201882A (en) * | 1997-06-09 | 1998-12-16 | 中国科学院大连化学物理研究所 | Combustion method for industrial heating furnace by membrane local rich oxygen supply |
| CN2643182Y (en) * | 2002-11-25 | 2004-09-22 | 沈光林 | A partially oxygen-enriching combustion-supporting system for boiler |
| CN101182217A (en) * | 2007-12-06 | 2008-05-21 | 武汉理工大学 | Rich-oxygen and pure oxygen burning roller-way kiln |
-
2008
- 2008-12-15 CN CN2008102337264A patent/CN101445372B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1201882A (en) * | 1997-06-09 | 1998-12-16 | 中国科学院大连化学物理研究所 | Combustion method for industrial heating furnace by membrane local rich oxygen supply |
| CN2643182Y (en) * | 2002-11-25 | 2004-09-22 | 沈光林 | A partially oxygen-enriching combustion-supporting system for boiler |
| CN101182217A (en) * | 2007-12-06 | 2008-05-21 | 武汉理工大学 | Rich-oxygen and pure oxygen burning roller-way kiln |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2001-58873A 2001.03.06 |
| 沈光林.膜法富氧技术的研究与应用.《大众用电》.1998,(第5期), * |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20090603 Assignee: Yunnan Yida Yimen Ceramic Co. Assignor: Wang Rulin Contract record no.: 2013530000065 Denomination of invention: Method for applying membrane oxygen enrichment technology in roller kiln Granted publication date: 20120523 License type: Exclusive License Record date: 20130624 |
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Granted publication date: 20120523 Termination date: 20151215 |
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