CN202119244U - Tunnel kiln for firing ceramic heat accumulator - Google Patents
Tunnel kiln for firing ceramic heat accumulator Download PDFInfo
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- CN202119244U CN202119244U CN2011202321634U CN201120232163U CN202119244U CN 202119244 U CN202119244 U CN 202119244U CN 2011202321634 U CN2011202321634 U CN 2011202321634U CN 201120232163 U CN201120232163 U CN 201120232163U CN 202119244 U CN202119244 U CN 202119244U
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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
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Abstract
The utility model relates to a tunnel kiln for firing a ceramic heat accumulator, which comprises a kiln body preheating zone, a firing zone and a cooling zone. The tunnel kiln for firing the ceramic heat accumulator is characterized in that the preheating zone is divided into three independent balance systems through waste heat air and smoke serving as air curtains, and three independent balance systems include a moisture discharging section, a tar discharging section and a smoke discharging section. The tar discharging section is provided with a plurality of groups of kiln crown jetting devices and a plurality of sets of high-speed temperature regulation burning nozzles. A side jetting device is arranged on the upper portion of a kiln wall of a burning nozzle zone under the front section of the firing zone, and a cooling section chilling zone is provided with a single circuit frequency conversion regulation system with a proportion integration differentiation (PID) algorithm. Thus, the problems that up-and-down temperature differences are large, the energy consumption is large, and the passing rate of fired products is low are resolved. The tunnel kiln is applied to ceramic heat accumulators containing tung oil, colza oil, methylcellulose and the like which highly require for temperature uniformity, thereby having the advantages of being obvious in energy saving effect, improving passing rate of products and the like.
Description
Technical field
The utility model belongs to the ceramic kiln technical field; Be specifically related to a kind of structure that is used for the tunnel cave of firing ceramics heat storage; Mainly be applicable to contain tung oil, rapeseed oil, methylcellulose etc., and the burning till of the temperature homogeneity ceramic heat storage body of having relatively high expectations and other similar ceramic product.
Background technology
Ceramic heat storage body is a kind of environmental protection fine ceramics that extensively applies to metallurgy industry.Because its moulding adopted a kind of special extrusion process, this forming method to its pug require to have higher associativity with lubricity so that moulding, so organic components such as just must adding in the raw material more oil and methylcellulose.Because a large amount of addings of these materials in sintering process, particularly will produce a large amount of flammable tar gas between 200-500 ℃.These flammable tar gas are like discharging in time, and kiln temperature is inhomogeneous again, under the situation of infiltrating a large amount of air, will cause product early stage fire burns, cause the product cracking to be scrapped.In view of burning till of this special ceramics of ceramic heat storage body, at present domestic all is to adopt the airtight process for calcining of batch (-type) down-draft kiln, promptly turns down stack damper, reduces combustion air, and the malleation reducing flame burns till in the kiln.Cause a large amount of flammable tar gas slowly to evaporate, have a strong impact on surrounding environment, and output is little, energy consumption is big, quality is unstable through slit, kiln body imprecision place.In view of above factor, adopt continous way tunnel cave firing ceramics heat storage imperative.
Though the tunnel cave advantage is a lot, because it is the horizontal flame formula kiln that a kind of air-flow is bottom horizontal flow sheet, its preheating zone ubiquity upper and lower temperature difference; Since the inhomogeneities of section temperature, thus cause goods stress bigger, cause the goods cracking easily; And prolonged firing time, reduced furnace output.The major reason that produces upper and lower temperature difference in the kiln is stratification of hot gas or burner irrational distribution.Because of this band is in negative-pressure operation, from the imprecision of kiln, like the kiln inlet, the song seam between kiln car and the kiln wall; A large amount of cold wind are infiltrated in joints between kiln car and the kiln car etc., and cold wind density is bigger, falls to the kiln bottom; And kiln has certain altitude, under how much pressure head effects, forces the less hot flue gas of most of density to float over top flowing; Cause the air-flow layering, improved upper temp, reduced temperature of lower; Add kiln car and need a large amount of absorption heats, temperature of lower is reduced, so just more further aggravated the upper and lower temperature difference of preheating zone; In addition because the negative-pressure operation of preheating zone makes a large amount of fresh airs get in the kiln, and the flammable tar gas mixed combustion that these fresh airs are very easily discharged with ceramic heat storage body after getting in kilns, thereby cause goods to catch fire and ftracture.
Simultaneously this goods of ceramic heat storage body belong to a kind of fine ceramics, its dimensional accuracy and requirement of strength are all required than other ceramic product much higher, so the control of the cooling velocity of the high temperature section temperature homogeneity of clinkering zone and salband also cause close important.Rationally whether this also is an important indicator of estimating the advanced degree of a tunnel cave in energy-saving and emission-reduction aspect in addition, and these problems are all further solved in the utility model.
The common way of present domestic tunnel cave preheating zone is at kiln hood the sealing air curtain to be set; Directly adopt high pressure cold wind to form one barrier from the aperture high speed ejection of kiln hood air curtain airduct, stop extraneous cold wind to bleed in the kiln, Yao Qiang top is provided with many cold wind injection apparatus in the preheating zone simultaneously; High velocity air forces high-temperature flue gas to flow downward; Though above-mentioned way has been dwindled the temperature difference in the kiln to a certain extent,, dwindle upper and lower temperature difference because the cold wind that only depends on top to spray into reduces kiln internal upper part temperature; And can not organize effective hot gas to form the air-flow circulation; Especially nearly all kiln is not established high velocity temperature adjusting burner in the bottom of this band kiln wall, makes temperature of lower obviously not improve, and the temperature difference is all about 200 ℃ in the kiln.Although the kiln that has also is provided with several high velocity temperature adjusting burners in the preheating zone; Upper and lower temperature difference has more obviously change; But because the secondary temperature adjustment wind that temperature-adjusting burner adopted all is to have adopted fresh air; The wind that sprays of this section top also be fresh air in addition, and ceramic heat storage body is because higher this particularity of its tar content, and these spray into oxygen in the furnace air in a large number and mix with the tar fuel gas of discharge and be easy to burn; Thereby cause the goods cracking that catches fire, so also burn till with regard to having satisfied not ceramic heat storage body and the high specialities of tar content.With regard to the clinkering zone high-temperature region, present conventional way is to prolong the kiln length direction to arrange several iso-jet burners, and divides into groups to control by each temperature section; The existing burner of going up of each adjusting group has following burner again; Temperature detecting point is arranged on the centre of kiln wall, should not control upper and lower temperature difference like this, and iso-jet burner temperature homogeneity and energy-conservation aspect far away not as good as impulse burner; And this fine ceramics of ceramic heat storage body is quite high to its dimensional requirement.Therefore require the high-temperature region temperature homogeneity also quite high.This shows, only adopt current traditional burner type selecting and method for arranging to reach and fire the required requirement of fine ceramics; In addition, the cooling of tunnel cave at present directly sprays into refrigerated product in the kiln by high pressure positive blower several pipelines of kiln top that vertically, laterally reach through the kiln wall, its cooling velocity by the valve on the pipeline through manually controlling its cold wind air quantity.As running into into that vehicle speed and entrucking density change to some extent, its cooling velocity is respective change also.Bigger as changing, very easily reduce product strength, even produce the cold cracking phenomenon; And this fine ceramics of ceramic heat storage body is quite big to the sensitiveness of its cooling velocity; Control and improperly very easily ftracture or influence its intensity and look face, therefore must adopt cooling velocity to control automatically, to improve its product quality.
Summary of the invention
The purpose of the utility model mainly is owing to the technical measures that overcome the temperature difference are not enough to existing ceramic roller kiln; And because of factors such as kiln atmosphere, pressure can not satisfy tar and more ceramic heat storage body and other like product of content of organics burns till, and the technical scheme and the measure of a series of improvement structures that propose.
A kind of tunnel cave that is used for the firing ceramics heat storage that the utility model provides; Comprise kiln body preheating zone, clinkering zone, salband and kiln car; It is characterized in that: on the preheating zone of tunnel cave both walls and kiln top by the kiln car direct of travel be provided with kiln hood hot blast sealing air curtain in regular turn, first hot blast stops that air curtain, second hot blast stop air curtain; The preheating zone is divided into the hydrofuge section, coke discharging section and smoke evacuation section; The kiln both walls branch upper, middle and lower of hydrofuge section are provided with one group of horizontal spray hot wind device, and the kiln both walls and the Yao Ding of hydrofuge section are provided with weep hole; The coke discharging section is provided with many group kiln top injection apparatus and many cover high velocity temperature adjusting burners.
The utility model prioritization scheme further is: on the basis of adopting abovementioned technology; The Yao Qiang top that also is included in burner zone under the clinkering zone leading portion is provided with side-spraying device; This side-spraying device is corresponding one by one with the bottom iso-jet burner; Interlaced arrangement up and down, end is provided with the top impulse burner and following impulse burner of the control of dividing into groups in the clinkering zone high-temperature region, is provided with two temperature detecting point in the top and the bottom in same cross section; Top impulse burner control head temperature, following impulse burner control temperature of lower.
The utility model further prioritization scheme is: on the basis of adopting abovementioned technology, also be included in the single-loop regulating system that the cooling section quench zone is provided with pid algorithm.
The utility model adopts technique scheme, as air curtain this band is divided into three independently balance sysmtes through waste heat air and flue gas in the preheating zone of tunnel cave both walls and kiln top, is respectively the hydrofuge section, coke discharging section and smoke evacuation section, and the three is indispensable.The hydrofuge section stirs blower fan through hot blast and directly squeezes into the waste heat wind of salband in the kiln; A part stops the outer cold wind of kiln to infiltrate in the kiln as kiln hood hot blast sealing air curtain; A part is as stopping that air curtain is with the hot-air of separation hydrofuge section and the mutual mixed combustion of tar gas of coke discharging section; Another part then is provided with one group of horizontal spray hot wind device through kiln both walls branch upper, middle and lower and directly sprays into kiln inner drying goods in horizontal direction, and the steam that is produced expels from kiln rapidly through wet-emitting blower through side wall or kiln top weep hole.Make its product obtain abundant drying, lay a good foundation, also improved temperature of kiln head simultaneously, dwindled the temperature difference of this section for goods get into the coke discharging section.The coke discharging section is provided with respectively with the smoke evacuation section and stops air curtain, also is provided with many group kiln top injection apparatus and many cover high velocity temperature adjusting burners simultaneously.Stir a hot flue gas part that blower fan will come from the smoke evacuation section as stopping that air curtain is with minute separable flue gas and tar gas between coke discharging section and the smoke evacuation section through flue gas; Make its concentrated coke discharging, stop that simultaneously high-temperature combustion product directly gets into the coke discharging section and tar gas mixed combustion prevents the goods cracking; A part sprays in the kiln through kiln top injection apparatus and the reverse high speed of airstream in kiln; Combustion product to force clinkering zone to be come flows downward, and overcomes stratification of hot gas, to regulate this section temperature up and down; Another part is as the secondary wind of this section temperature-adjusting burner; To regulate the combustion product temperature of each temperature-adjusting burner,, make that temperature is very even up and down in the kiln through the exhaust gas volumn of mixing to reach the effect that replenishes this kiln temperature of lower.Can find out from above; No matter this two band stops that air curtain still is that the secondary temperature adjustment wind of top jet and high velocity temperature adjusting burner has all adopted a large amount of flue gases; Therefore this section is to be in positive pressure operation basically; Anaerobic state, this has just overcome the phenomenon that tar gas that this grease of ceramic heat storage body and content of organics high product produced and oxygen mixed combustion cause the goods cracking in sintering process.The improvement of this structure can make the upper and lower temperature difference of tunnel cave preheating zone narrow down to about 30 ℃.Because this section has reduced upper and lower temperature difference in the kiln, and is in anaerobic positive pressure operation state, makes this kiln product be heated evenly; And missing of ignition, the while has also made full use of the heat energy of flue gas, has accelerated go-cart speed; Burn till quality and output thereby improved product, reduced energy consumption.
Kiln wall upper side spray apparatus has been adopted in the burner zone under the clinkering zone leading portion, and this side-spraying device is corresponding one by one with the bottom iso-jet burner; Interlaced arrangement up and down, the high-temperature flue gas that comes from the smoke evacuation section stirs blower fan through flue gas, sprays in the kiln through this device high speed; The combustion product of the bottom burner corresponding with it forms the multiply eddy flow; Make it on the lateral cross section of kiln, produce strong agitation circulation, make in the kiln about, internal and external temperature is very even; Terminal in the clinkering zone high-temperature region, adopt burner grouping control up and down, in the top and the bottom in same cross section two temperature detecting point are set; Last burner control head temperature; Following burner is controlled temperature of lower, and has adopted the impulse burner combustion technology at this temperature section, and upper and lower temperature difference is regulated its flame size automatically by burner and controlled; Pulse-combustion is very energy-conservation; Make its this section temperature quite even simultaneously, thereby guaranteed the dimensional accuracy of this fine ceramics of ceramic heat storage body, improved its product quality effectively.
Adopt the single-loop regulating system of pid algorithm at the cooling section quench zone; This zone kiln temperature is automatically adjusted; Even setting density or go-cart speed change to some extent like this, its rate of temperature fall also can be effectively controlled, thereby has improved product strength; Avoided producing, further guaranteed its product percent of pass because of cooling off the improper cracking phenomena that causes.
Description of drawings
Fig. 1 is the utility model hydrofuge section kiln body vertical structure sketch map;
Fig. 2 is the utility model coke discharging and smoke evacuation section vertical structure sketch map;
Fig. 3 is the utility model hydrofuge section kiln body section structural representation;
Fig. 4 is the utility model coke discharging and smoke evacuation section kiln body section structural representation;
Fig. 5 is a clinkering zone front end kiln body section structural representation;
Fig. 6 is the utility model clinkering zone high-temperature region terminal kiln body section structural representation;
Fig. 7 is the utility model salband quench zone vertical structure sketch map;
Fig. 8 is the utility model salband quench zone kiln body section structural representation.
The specific embodiment
The concrete structure of the utility model combines accompanying drawing to describe in detail as follows:
The utility model comprises: 1-firing chamber, 2-kiln wall, 3-kiln top, 4-kiln car, 5-kiln hood hot blast sealing air curtain; 6-first hot blast stops air curtain, and 7-second hot blast stops air curtain, 8-kiln top injection apparatus, 9-horizontal-jet device, 10-kiln top weep hole; 11-kiln side wall weep hole, 12-coke discharging hole, 13-exhaust smoke hole, 14-high velocity temperature adjusting burner, 15-iso-jet burner; The 16-side-spraying device, 17-peephole, 18-bottom impulse burner, 19-top impulse burner, the combustion-supporting airduct of 20-hot blast; The 21-upper thermocouple, 22-bottom thermocouple, the 23-first road chilling air curtain, the 24-second road chilling air curtain, 25-quench zone temperature control point.
1, stirs blower fan by hot blast the waste heat wind of salband is directly sent into the hydrofuge section respectively through in the kiln hood hot blast sealing air curtain 5 prevention kiln hood cold wind infiltration kilns; Terminal first hot blast of hydrofuge section stops that air curtain 6 with the hot-air of separation hydrofuge section and the tar gas of coke discharging section, prevents its mixed combustion.And horizontal-jet device 9 is used for dry products, and the steam that is produced in the dry run expels from kiln rapidly through side wall weep hole 11 or kiln top weep hole 10, makes its product obtain abundant drying, has not only put forward this section temperature, dwindled the temperature difference simultaneously again.
2, stir the hot flue gas that blower fan will come from the smoke evacuation section through flue gas and squeeze into coke discharging section and smoke evacuation section respectively; Stop air curtain 7 with minute separable flue gas and tar gas through second hot blast, make its concentrated coke discharging, stop that simultaneously high-temperature combustion product gets into the coke discharging section rapidly and the tar gas mixture burns causes the product cracking; Injection apparatus 8 reverse the spraying in the kiln through the kiln top; Combustion product to force clinkering zone to be come flows downward, and overcomes this section stratification of hot gas, regulates upper and lower temperature difference.Hot in addition flue gas is as the secondary temperature adjustment wind of this pars infrasegmentalis temperature-adjusting burner 14; Its combustion product temperature can be regulated arbitrarily; Replenish this pars infrasegmentalis action of temperature to reach; Further dwindled upper and lower temperature difference, simultaneously guaranteed that also this section is in the positive pressure operation anaerobic state, stopped the higher ceramic heat storage body of tar content in the catch fire generation of combustion phenomena of this section.
3, the high-temperature flue gas that comes from smoke evacuation section stirs blower fan through flue gas and sprays into the section of burning till top under the clinkering zone at a high speed through side-spraying device 16; The combustion product of the bottom iso-jet burner 15 corresponding with it forms the multiply eddy flow; The circulation of generation strong agitation; Make should the zone kiln in about, internal and external temperature is very even, lay a good foundation for dwindling the later stage temperature difference.
4, the terminal form of dividing into groups up and down that adopts is regulated temperature up and down respectively in the clinkering zone high-temperature region; Temperature by several impulse burner 18 control bottom thermocouples 21 of bottom; The temperature of several impulse burner 19 control upper thermocouple 20 of top owing in this temperature province, adopted temperature grouping control separately up and down, makes its this section temperature quite even; And very energy-conservation, guaranteed the dimensional accuracy of this fine ceramics of ceramic heat storage body.
5, adopt the single-loop regulation and control system of pid algorithm at the cooling section quench zone; Provide the cold wind warp first road chilling curtain 23 and the second road chilling air curtain 24 directly to spray in the kiln by the chilling blower fan and carry out the heat exchange refrigerated product with product, its cooling velocity is controlled by the size of the cold wind air quantity that sprays into.The cold wind air quantity provides signal by quench zone temperature control point 25 and regulates the frequency conversion of chilling blower fan automatically and realize.Owing to adopted above cooling control device; Its rate of temperature fall can be consistent all the time; Avoided changing because of setting density or go-cart rapid change thereupon; Thereby overcome because of cooling off improper product cracking and the aberration problem that causes, also improved product strength simultaneously, improved its product quality effectively.
Claims (3)
1. tunnel cave that is used for the firing ceramics heat storage; Comprise kiln body preheating zone, clinkering zone, salband and kiln car (4); It is characterized in that: on the preheating zone of tunnel cave both walls and kiln top by the kiln car direct of travel be provided with kiln hood hot blast sealing air curtain (5) in regular turn, first hot blast stops that air curtain (6), second hot blast stop air curtain (7); The preheating zone is divided into the hydrofuge section, coke discharging section and smoke evacuation section; The kiln both walls branch upper, middle and lower of hydrofuge section are provided with one group of horizontal spray hot wind device (9), and the kiln both walls and the Yao Ding of hydrofuge section are provided with weep hole; The coke discharging section is provided with many group kiln top injection apparatus (8) and many cover high velocity temperature adjusting burners (14).
2. according to the said tunnel cave that is used for the firing ceramics heat storage of claim 1; It is characterized in that: the Yao Qiang top in burner zone is provided with side-spraying device (16) under the clinkering zone leading portion; This side-spraying device is corresponding one by one with bottom iso-jet burner (15); Interlaced arrangement up and down, end is provided with the top impulse burner (19) and the bottom impulse burner (18) of the control of dividing into groups in the clinkering zone high-temperature region, is provided with two temperature detecting point in the top and the bottom in same cross section; Top impulse burner (19) control head temperature, bottom impulse burner (18) control temperature of lower.
3. according to claim 1 or the 2 said tunnel caves that are used for the firing ceramics heat storage, it is characterized in that: the single-loop regulating system that is provided with pid algorithm at the cooling section quench zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202321634U CN202119244U (en) | 2011-07-04 | 2011-07-04 | Tunnel kiln for firing ceramic heat accumulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202321634U CN202119244U (en) | 2011-07-04 | 2011-07-04 | Tunnel kiln for firing ceramic heat accumulator |
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| Publication Number | Publication Date |
|---|---|
| CN202119244U true CN202119244U (en) | 2012-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202321634U Expired - Fee Related CN202119244U (en) | 2011-07-04 | 2011-07-04 | Tunnel kiln for firing ceramic heat accumulator |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105627734A (en) * | 2016-03-09 | 2016-06-01 | 浙江尚鼎工业炉有限公司 | Heating furnace capable of fast heating |
| CN107677120A (en) * | 2017-10-31 | 2018-02-09 | 广西南山瓷器有限公司 | Energy-saving environment-friendly ceramic kiln |
| CN107894161A (en) * | 2017-12-18 | 2018-04-10 | 苏州科尔珀恩机械科技有限公司 | Lithium battery two-chamber sintering furnace |
| CN108007188A (en) * | 2017-12-21 | 2018-05-08 | 新化县新园电子陶瓷有限公司 | Kiln for ceramic post sintering de-waxing |
| CN110736101A (en) * | 2019-11-23 | 2020-01-31 | 四川托璞勒科技有限公司 | heat accumulating type direct-fired oxidation back-burning equipment and online back-burning process |
| CN112504910A (en) * | 2020-11-03 | 2021-03-16 | 上海应用技术大学 | Evaluation device and evaluation method for anaerobic biochemical effect of wastewater |
-
2011
- 2011-07-04 CN CN2011202321634U patent/CN202119244U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105627734A (en) * | 2016-03-09 | 2016-06-01 | 浙江尚鼎工业炉有限公司 | Heating furnace capable of fast heating |
| CN107677120A (en) * | 2017-10-31 | 2018-02-09 | 广西南山瓷器有限公司 | Energy-saving environment-friendly ceramic kiln |
| CN107894161A (en) * | 2017-12-18 | 2018-04-10 | 苏州科尔珀恩机械科技有限公司 | Lithium battery two-chamber sintering furnace |
| CN108007188A (en) * | 2017-12-21 | 2018-05-08 | 新化县新园电子陶瓷有限公司 | Kiln for ceramic post sintering de-waxing |
| CN108007188B (en) * | 2017-12-21 | 2024-03-26 | 新化县新园电子陶瓷有限公司 | Kiln for ceramic sintering and dewaxing |
| CN110736101A (en) * | 2019-11-23 | 2020-01-31 | 四川托璞勒科技有限公司 | heat accumulating type direct-fired oxidation back-burning equipment and online back-burning process |
| CN112504910A (en) * | 2020-11-03 | 2021-03-16 | 上海应用技术大学 | Evaluation device and evaluation method for anaerobic biochemical effect of wastewater |
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| C14 | Grant of patent or utility model | ||
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20130704 |