CN201740378U - Low-energy-consumption wide-body tunnel kiln - Google Patents
Low-energy-consumption wide-body tunnel kiln Download PDFInfo
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- CN201740378U CN201740378U CN2010202161537U CN201020216153U CN201740378U CN 201740378 U CN201740378 U CN 201740378U CN 2010202161537 U CN2010202161537 U CN 2010202161537U CN 201020216153 U CN201020216153 U CN 201020216153U CN 201740378 U CN201740378 U CN 201740378U
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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Abstract
The utility model discloses a low-energy-consumption wide-body tunnel kiln which pertains to the technical field of industrial kilns. The low-energy-consumption wide-body tunnel kiln comprises a flat-top kiln body extending longitudinally; the kiln body is divided into a smoke discharging area, a preheating area, a sintering area, a quenching area and a cooling area in sequence in the extension direction; the five areas are connected together; gas burners controlled by a burning control system are arranged on the side wall of the kiln body; the sintering area of the kiln body is provided with a plurality of transverse mounting surfaces used for mounting the gas burners at intervals; each transverse mounting surface is provided with two opposite gas burners arranged up and down; and two gas burners, which are arranged on two adjacent transverse mounting surfaces and positioned on the same side of the sintering area of the kiln body, are arranged up and down in a staggered way. The low-energy-consumption wide-body tunnel kiln improves the flow direction of the atmosphere in the kiln, and enables the temperature of the upper part and the lower part of the cross section of the interior of the kiln to be uniform, thus improving the quality of sintered ceramic products; and the tunnel kiln saves fuel, reduces energy consumption, and improves the working environment.
Description
Technical field
The utility model relates to technical field of industrial furnaces, relates in particular to a kind of low-energy consumption wide tunnel furnace that is applicable to that ceramic is fired.
Background technology
China is the big producing country of pottery, and the output of pottery accounts for 50 percent of world's Production of Ceramics total amount, yet the ceramic production device of China is also relatively backward, and the ceramic mass ratio that is fired into is relatively poor, serious waste of resources.
The porcelain base need be through 600 degree preheatings during ceramic sintering, 1200 degree burn till, a series of technologies such as 600 degree chillings and 200 degree coolings realize, for the raising that realizes the ceramic sintering quality and the increase of output, kiln is also in continuous development, be improved to the half dome tunnel cave from traditional vault tunnel cave, there has been the flat-top tunnel cave in ceramic sintering industry, to use at present, for example Chinese utility application prospectus CN201293548Y discloses a kind of energy-efficient tunnel cave, collection semicircular arch tunnel cave, the advantage of three-core vault tunnel cave and flat-top tunnel cave is in one, its thermal property is progressively improved, improved the quality of firing of ceramic to a certain extent, but still there is certain defective, is mainly reflected in:
1, kiln temperature is inhomogeneous up and down, and atmosphere flows to bad, when ceramic is fired, can produce and fire inhomogeneously, causes the phenomenon of the ceramic underburnt of the ceramic burning on upper strata or lower floor, directly has influence on the quality of firing of ceramic;
2, the heat-insulating property of kiln body is bad, and heat runs off serious, makes that not only environment temperature is too high in the workshop, the infringement that brings health to the operator, and to guarantee the firing temperatures of 1200 degree, the continuous postcombustion of needs remedies the heat of loss, causes the wasting of resources.
The utility model content
Technical problem to be solved in the utility model is: a kind of low-energy consumption wide tunnel furnace is provided, flows to improve kiln atmosphere, temperature is even up and down to make the interior cross section of kiln, thereby improve the quality of the ceramic that is fired into, and fuel saving cuts down the consumption of energy, and improves working environment.
For solving the problems of the technologies described above, the technical solution of the utility model is: low-energy consumption wide tunnel furnace, comprise the flat-top kiln body of longitudinal extension, described kiln body is divided into smoke evacuation district, preheating zone, firing zone, quench zone and the cooling zone that links together successively on bearing of trend; The sidewall of described kiln body is provided with the gas burner by combustion control system control, and described gas burner is communicated with fuel gas pipeline and combustion air pipeline respectively; Described firing zone kiln body has several horizontal installed surfaces that is used to install gas burner that is provided with at interval, two gas burners of arranging relatively and up and down all are installed on each horizontal installed surface, are installed on adjacent two horizontal installed surfaces and two gas burners being positioned at firing zone kiln body the same side interlaced arrangement up and down.
As a kind of improvement, the sidewall and the top of described kiln body are sandwich, are respectively refractory brick, heat-preservation cotton and steel structure frame from the inside to the outside.
As further improvement, the kiln body of described smoke evacuation district, preheating zone, quench zone and cooling zone top is equipped with the air outlet that links to each other with the air inducing pipeline.
As further improvement, described gas burner comprises burner housing, be arranged with Gas Pipe in the described burner housing, be arranged with first combustion tube in the described Gas Pipe, cavity in described first combustion tube forms the first combustion-supporting passage, cavity between described first combustion tube and the Gas Pipe forms blast tube, and the end of the described first combustion-supporting passage and the end of blast tube converge the formation mixing chamber, are provided with igniter in the described mixing chamber; Cavity between described Gas Pipe and the burner housing inwall forms the second combustion-supporting passage.
As further improvement, be provided with flame detecting device in the described burner housing, the test point of described flame detecting device is near described mixing chamber.
As further improvement, described igniter comprises a fire rod, and described fire rod is fixedly installed in an end of described burner housing and extends along described blast tube; Described flame detecting device comprises a flame test bar, described flame test bar be fixedly installed in described burner housing an end and with the parallel installation of described fire rod.
As further improvement, described combustion control system comprises the PLC control module; Be arranged at the combustion-supporting control gas circuit of big fire between the described second combustion-supporting passage and the combustion air pipeline; Be arranged at the combustion gas control gas circuit between described blast tube and the fuel gas pipeline; Be arranged at the combustion-supporting control gas circuit of premix between the described first combustion-supporting passage and the combustion air pipeline.
As further improvement, the combustion-supporting control gas circuit of described big fire comprises a Pneumatic impulse valve by solenoid control, and described magnetic valve is electrically connected with described PLC control module; Described combustion gas control gas circuit comprises the first automatically controlled stop valve and the second automatically controlled stop valve of mutual series connection, the described first automatically controlled stop valve is positioned at upstream position, the control end of the described first automatically controlled stop valve and the second automatically controlled stop valve is electrically connected with described PLC control module respectively, and the described second automatically controlled stop valve is parallel with a choke valve.
As further improvement, also be provided with little flame between the described second combustion-supporting passage and the combustion air pipeline and adjust gas circuit, it is in parallel with the combustion-supporting control gas circuit of big fire that described little flame is adjusted gas circuit.
As further improvement, described little flame is adjusted gas circuit and is comprised a stop valve.
After having adopted technique scheme, the beneficial effects of the utility model are: as firing zone the most key in the burning process, its extended distance is the longest, the temperature control requirement height, because adjacent two gas burners in the same side interlaced arrangement up and down on the sidewall of firing zone kiln body, two gas burners interlaced arrangement relatively and up and down on the cross section of firing zone kiln body, make in sintering procedure, fuel sprays into the kiln intracoelomic cavity at a high speed, in the heating ceramic goods, atmosphere in the kiln body is stirred, improve atmosphere and flow to, on kiln body cross section, form eddy current, reduce the upper and lower temperature difference of firing zone kiln intracoelomic cavity, increase the temperature homogeneity of kiln intracoelomic cavity, improved the quality of firing of ceramic, can realize firing of ceramic in the breadth of effective width 〉=2.5 meter.
Owing to be provided with igniter and flame detecting device in the burner housing, realized that automatic igniting and flame detect, guarantee in time to light the safety cut-off of the burner housing and the fuel of fire extinguishing, can accurately control ceramic in aflame mean temperature, not be subjected to the loading density of kiln car and influence Temperature Distribution.
Because the sidewall and the top of kiln body are sandwich, be respectively refractory brick, heat-preservation cotton and steel structure frame from the inside to the outside, compare with traditional wall-body kiln body, the steel structure frame fabrication and installation are convenient, can realize modularization making, merogenesis is made, adopt the on-the-spot ways of connecting of installing of securing member then, convenient transportation is installed simple and easy, shortened field installation time greatly, and alleviated interference and pollution the erecting bed; Owing to be provided with heat-preservation cotton at the skin of refractory brick, heat-preservation cotton light weight, insulation, heat insulation make the weight saving of kiln body, high insulating effect, thus reduced the heat loss, improve the working environment in workshop, and reduced the use amount of fuel, reduced energy consumption.
Because the kiln body top of smoke evacuation district, preheating zone, quench zone and cooling zone is equipped with the air outlet that links to each other with the air inducing pipeline, make the heat energy of fuel combustion be fully used, further reduced the discharging of efficient resource, by recycling, save the energy, reduced production cost.
Because gas burner is provided with Gas Pipe, first combustion tube and the second combustion-supporting passage, first combustion tube is positioned at Gas Pipe inside, makes fuel be able to abundant burning, has saved fuel, has reduced toxic emission; Owing to be provided with igniter and flame detecting device in the second combustion-supporting passage, flame detecting device detects and can send instruction immediately after the fray-out of flame blast tube is closed, the fuel savings resource, eliminated potential safety hazard simultaneously, when needs were lighted a fire, igniter can realize automatic igniting rapidly efficiently, made igniter and flame detecting device with after control system is connected, realize regulating automatically flame, fire quality with raising.
Owing to designed combustion-supporting control gas circuit of big fire and combustion gas control gas circuit by the control of PLC control module, make gas burner control accurately, can save the combustion gas resource according to kiln temperature auto scaling fire; Owing to be connected with Pneumatic impulse valve on the combustion-supporting control gas circuit of big fire, Pneumatic impulse valve action sensitivity height, can connect or close the combustion-supporting control gas circuit of big fire moment, make the flame of gas burner can be formed in the pulse-combustion between big fire and the little fire, thereby formed the stirring air-flow, improve the firing atmosphere in the kiln, the interior upper and lower temperature difference of kiln is dwindled, improved the quality of burning till of product.
Adjust gas circuit owing to designed the little flame in parallel with the combustion-supporting control gas circuit of big fire, make the flame of gas burner have combustion air combustion-supporting always, fuel gas buring is abundant, the burning quality height.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the gas burner layout drawing that amplify in the firing zone cross section;
Fig. 3 is the structural representation of gas burner;
Fig. 4 is the control principle figure of gas burner;
Among the figure: 1, the charging kiln car, 2, the smoke evacuation district, 3, the preheating zone, 4, firing zone, 5, quench zone, 6, the cooling zone, 7, the discharging kiln car, 9, gas burner, 90, burner housing, 91, the second combustion-supporting passage, 92, Gas Pipe, 93, first combustion tube, 94, the flame test bar, 95, fire rod, 10, Pneumatic impulse valve, 11, refractory brick, 12, heat-preservation cotton, 13, steel structure frame, 14, fuel gas pipeline, 15, the combustion air pipeline, 16, the first automatically controlled stop valve, 17, the second automatically controlled stop valve, 18, choke valve, 19, magnetic valve, 20, stop valve, 21, the PLC control module, 22, thermocouple.
The specific embodiment
As depicted in figs. 1 and 2, a kind of low-energy consumption wide tunnel furnace, the flat-top kiln body that comprises longitudinal extension, described kiln body is divided into smoke evacuation district 2, preheating zone 3, firing zone 4, quench zone 5 and the cooling zone 6 that links together successively on bearing of trend, the sidewall of described kiln body is provided with the gas burner 9 by combustion control system control, and described gas burner 9 is communicated with fuel gas pipeline 14 and combustion air pipeline 15 respectively; The kiln body of described firing zone 4 has several horizontal installed surfaces that is used to install gas burner 9 that is provided with at interval, two gas burners of arranging relatively and up and down 9 all are installed on each horizontal installed surface, are installed on adjacent two horizontal installed surfaces and two gas burners of kiln body the same side of being positioned at firing zone 4 interlaced arrangement about in the of 9.
The sidewall and the top of described kiln body are sandwich, be respectively refractory brick 11, heat-preservation cotton 12 and steel structure frame 13 from the inside to the outside, can realize modularization making, merogenesis is made, adopt the on-the-spot ways of connecting of installing of securing member then, convenient transportation is installed simple and easy, shortened field installation time greatly, and alleviated interference and pollution the erecting bed.
The kiln body top of described smoke evacuation district 2, preheating zone 3, quench zone 5 and cooling zone 6 is equipped with the air outlet that links to each other with the air inducing pipeline, induced pipe connects air-heater, with heat recovery, has saved the energy, reduce the discharging of efficient resource, reduced production cost.
As shown in Figure 3, described gas burner 9 comprises burner housing 90, be arranged with Gas Pipe 92 in the described burner housing 90, be arranged with first combustion tube 93 in the described Gas Pipe 92, cavity in described first combustion tube 93 forms the first combustion-supporting passage, cavity between described first combustion tube 93 and the Gas Pipe 92 forms blast tube, the end of the described first combustion-supporting passage and the end of blast tube converge the formation mixing chamber, be provided with igniter in the described mixing chamber, described igniter comprises a fire rod 95, and described fire rod 95 is fixedly installed in an end of described burner housing 90 and extends along described blast tube; Cavity between the inwall of described Gas Pipe 92 and burner housing 90 forms the second combustion-supporting passage 91.Be provided with flame detecting device in the described burner housing 90, the test point of flame detecting device is near described mixing chamber, described flame detecting device comprises a flame test bar 94, described flame test bar 94 be fixedly installed in described burner housing 90 an end and with described fire rod 95 parallel installations, realized the flame detection, with timely cut-out blast tube, play safety effect.
As shown in Figure 4, described combustion control system comprises PLC control module 21; Be provided with the combustion-supporting control gas circuit of big fire between the described second combustion-supporting passage 91 and the combustion air pipeline 15, the combustion-supporting control gas circuit of described big fire comprises a Pneumatic impulse valve 10 by magnetic valve 19 controls, and described magnetic valve 19 is electrically connected with described PLC control module 21; Be provided with combustion gas control gas circuit between described blast tube and the fuel gas pipeline 14, described combustion gas control gas circuit comprises the first automatically controlled stop valve 16 and the second automatically controlled stop valve 17 of mutual series connection, the described first automatically controlled stop valve 16 is positioned at upstream position, the control end of the described first automatically controlled stop valve 16 and the second automatically controlled stop valve 17 is electrically connected with described PLC control module 21 respectively, and the described second automatically controlled stop valve 17 is parallel with a choke valve 18; Be provided with the combustion-supporting control gas circuit of premix between the described first combustion-supporting passage and the combustion air pipeline 15.Also be provided with little flame between the described second combustion-supporting passage 91 and the combustion air pipeline 15 and adjust gas circuit, it is in parallel with the combustion-supporting control gas circuit of big fire that described little flame is adjusted gas circuit, and described little flame is adjusted gas circuit and comprised a stop valve 20.
Its operation principle is as follows:
A, kiln preheating:
The PLC control module 21 controls first automatically controlled stop valve 16 is opened, connect blast tube and fuel gas pipeline 14, the combustion-supporting control gas circuit of premix is in normally open, and the mist of combustion gas and combustion air mixes the back ejection at mixing chamber, and fire rod 95 is lighted a fire automatically, choke valve 18 is in opening, realize little fire burns, after the flame ignition of gas burner 9, PLC control module 21 control second automatically controlled stop valves 17 and Pneumatic impulse valve 10 are opened, realize big fire burns, each regional temperature in the fast lifting kiln.
B, blank are fired:
The charging kiln car 1 that is mounted with the ceramic blank is under the control of PLC control module 21, enter the inner chamber of tunnel cave along track with certain speed, behind the preheating zone 3 through smoke evacuation district 2 and 600 degree, blank is preheated drying, enter the firing zone 4 of 1200 degree, in sintering procedure, fire blank and enter kiln, PLC control module 21 controls second automatically controlled stop valve 17 and the Pneumatic impulse valve 10, constantly realize replacing of large and small fire, the dutycycle of control flame big fire and little fire forms and stirs air-flow, the temperature difference of aspect is carried out roasting to blank about reducing in the kiln; The thermocouple 22 that is connected with PLC control module 21 in the kiln detects kiln temperature at any time, and PLC control module 21 controls the second automatically controlled stop valves 17 and Pneumatic impulse valve 10 is closed, and realizes that little fire keeps kiln temperature, saving combustion gas resource; When temperature arrives setting value, cut off combustion gas control gas circuit, energy savings; When the flame accident that runs into gas burner 9 was extinguished, flame test bar 94 detected less than flame, and PLC control module 21 is in time closed the first automatically controlled stop valve 16, cuts off blast tube safely, and programme-control is lighted a fire automatically then.After firing zone 4 is fired end, enter the cooling zone 6 of 600 degree quench zones 5 and 200 degree, the type of cooling by pulse cooling and injection cooling combine obtains accurate cooling curve, makes the cycle of firing reach the shortest.The ceramic of firing end is transported to storage area by discharging kiln car 7, the packing warehouse-in.
The utility model is not limited to above-mentioned concrete embodiment, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion of having done all drop within the protection domain of the present utility model.
Claims (10)
1. low-energy consumption wide tunnel furnace comprises the flat-top kiln body of longitudinal extension, and described kiln body is divided into smoke evacuation district, preheating zone, firing zone, quench zone and the cooling zone that links together successively on bearing of trend; The sidewall of described kiln body is provided with the gas burner by combustion control system control, and described gas burner is communicated with fuel gas pipeline and combustion air pipeline respectively; It is characterized in that: described firing zone kiln body has several horizontal installed surfaces that is used to install gas burner that is provided with at interval, two gas burners of arranging relatively and up and down all are installed on each horizontal installed surface, are installed on adjacent two horizontal installed surfaces and two gas burners being positioned at firing zone kiln body the same side interlaced arrangement up and down.
2. low-energy consumption wide tunnel furnace as claimed in claim 1 is characterized in that: the sidewall and the top of described kiln body are sandwich, are respectively refractory brick, heat-preservation cotton and steel structure frame from the inside to the outside.
3. low-energy consumption wide tunnel furnace as claimed in claim 2 is characterized in that: the kiln body top of described smoke evacuation district, preheating zone, quench zone and cooling zone is equipped with the air outlet that links to each other with the air inducing pipeline.
4. as described any low-energy consumption wide tunnel furnace of claim 1 to 3, it is characterized in that: described gas burner comprises burner housing, be arranged with Gas Pipe in the described burner housing, be arranged with first combustion tube in the described Gas Pipe, cavity in described first combustion tube forms the first combustion-supporting passage, cavity between described first combustion tube and the Gas Pipe forms blast tube, the end of the described first combustion-supporting passage and the end of blast tube converge the formation mixing chamber, are provided with igniter in the described mixing chamber; Cavity between described Gas Pipe and the burner housing inwall forms the second combustion-supporting passage.
5. low-energy consumption wide tunnel furnace as claimed in claim 4 is characterized in that: be provided with flame detecting device in the described burner housing, the test point of described flame detecting device is near described mixing chamber.
6. low-energy consumption wide tunnel furnace as claimed in claim 5 is characterized in that: described igniter comprises a fire rod, and described fire rod is fixedly installed in an end of described burner housing and extends along described blast tube; Described flame detecting device comprises a flame test bar, described flame test bar be fixedly installed in described burner housing an end and with the parallel installation of described fire rod.
7. low-energy consumption wide tunnel furnace as claimed in claim 6 is characterized in that: described combustion control system comprises the PLC control module; Be arranged at the combustion-supporting control gas circuit of big fire between the described second combustion-supporting passage and the combustion air pipeline; Be arranged at the combustion gas control gas circuit between described blast tube and the fuel gas pipeline; Be arranged at the combustion-supporting control gas circuit of premix between the described first combustion-supporting passage and the combustion air pipeline.
8. low-energy consumption wide tunnel furnace as claimed in claim 7 is characterized in that: the combustion-supporting control gas circuit of described big fire comprises a Pneumatic impulse valve by solenoid control, and described magnetic valve is electrically connected with described PLC control module; Described combustion gas control gas circuit comprises the first automatically controlled stop valve and the second automatically controlled stop valve of mutual series connection, the described first automatically controlled stop valve is positioned at upstream position, the control end of the described first automatically controlled stop valve and the second automatically controlled stop valve is electrically connected with described PLC control module respectively, and the described second automatically controlled stop valve is parallel with a choke valve.
9. low-energy consumption wide tunnel furnace as claimed in claim 7 is characterized in that: also be provided with little flame between the described second combustion-supporting passage and the combustion air pipeline and adjust gas circuit, it is in parallel with the combustion-supporting control gas circuit of big fire that described little flame is adjusted gas circuit.
10. low-energy consumption wide tunnel furnace as claimed in claim 9 is characterized in that: described little flame is adjusted gas circuit and is comprised a stop valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202161537U CN201740378U (en) | 2010-05-27 | 2010-05-27 | Low-energy-consumption wide-body tunnel kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202161537U CN201740378U (en) | 2010-05-27 | 2010-05-27 | Low-energy-consumption wide-body tunnel kiln |
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| Publication Number | Publication Date |
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| CN201740378U true CN201740378U (en) | 2011-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202161537U Expired - Lifetime CN201740378U (en) | 2010-05-27 | 2010-05-27 | Low-energy-consumption wide-body tunnel kiln |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852549A (en) * | 2010-05-27 | 2010-10-06 | 潍坊同晟工贸有限公司 | Low-energy consumption wide tunnel furnace |
| CN102809285A (en) * | 2012-08-08 | 2012-12-05 | 广东四通集团股份有限公司 | Large-section high-efficiency energy-saving type gas tunnel kiln |
| CN102809284A (en) * | 2012-03-06 | 2012-12-05 | 湖北京华陶瓷科技有限公司 | Energy-saving type low-temperature-difference ultra-wide tunnel calcining kiln |
| CN104567360A (en) * | 2014-12-27 | 2015-04-29 | 宁夏黑金科技有限公司 | Novel burning equipment for producing microcrystalline fireproof foaming heat-preservation material |
-
2010
- 2010-05-27 CN CN2010202161537U patent/CN201740378U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852549A (en) * | 2010-05-27 | 2010-10-06 | 潍坊同晟工贸有限公司 | Low-energy consumption wide tunnel furnace |
| CN102809284A (en) * | 2012-03-06 | 2012-12-05 | 湖北京华陶瓷科技有限公司 | Energy-saving type low-temperature-difference ultra-wide tunnel calcining kiln |
| CN102809285A (en) * | 2012-08-08 | 2012-12-05 | 广东四通集团股份有限公司 | Large-section high-efficiency energy-saving type gas tunnel kiln |
| CN104567360A (en) * | 2014-12-27 | 2015-04-29 | 宁夏黑金科技有限公司 | Novel burning equipment for producing microcrystalline fireproof foaming heat-preservation material |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110209 Effective date of abandoning: 20120307 |