• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1. Method of multistage drying of ceramic products moved during the drying process at a constant speed by cyclic blowing with coolant at the initial stages with varying ratio of the time of heat carrier supply to the cut-off time in each cycle and continuous blowing of the coolant. m at the last stage, characterized in that, in order to reduce the time of the day and improve the quality, the ratio of the heat carrier supply to the cut-off time is continuously increased from cycle to cycle by shortening the cut-off time. SD with SL
    公开号:SU1310595A1
    申请号:SU833675644
    申请日:1983-12-07
    公开日:1987-05-15
    发明作者:Луков Бенев Андрей；Драгомиров Райчев Вассил；Слатанов Йечев Георги；Николов Зончев Стилиан
    申请人:Книпсм "Заводпроект" (Инопредприятие)；
    IPC主号:
    专利说明:

    2. A method according to claim 1, characterized in that the ratio of the time of supply of the heat transfer medium to the cut-off time is increased no less than two times.
    3. A method according to claim 1, characterized in that the ratio of the supply time of the heat exchanger to the cut-off time increases according to a linear law.
    4. A method according to claim 1, characterized in that the ratio of the time of supply of the coolant to the cut-off time is increased according to a parabolic law.
    5. Method by. Claim 1, characterized in that the ratio of the coolant supply to the cut-off time increases the stage, with the number of stages not more than five.
    6. The method according to claim 5, characterized in that in the first stage the blowing begins at the ratio of the heat carrier supply time to the cut-off time of 1:30 and ends at the ratio of 1:24, the second stage ends at the ratio of 1:14, the third at
    one
    This invention relates to a technique for drying shrinkable articles and can be used in the manufacture of bricks, ceramic products and porcelain.
    The purpose of the invention is to reduce the time of the sugi, increase its quality and reduce energy consumption.
    FIG. 1 shows a single section of a device for drying pottery, front view; in fig. 2 is a device for drying ceramic products, top view; PA F IG 3 — change in the distance between the nozzles, the width of the nozzles, and the width of the modules.
    The device for ceramics contains a chamber 1 with a conveyor 2 inside for moving articles 3, a gas distribution manifold 4 located above and below the conveyor with a system of nozzles 5, perpendicular to the conveyor 2, having a variable width and mounted on the guides 6.
    The ceramic drying chamber 1 has three sections 7, 8 and 9, in the last of which the products are continuously blown through. The nozzles 5 of both gas-distributing collectors 4 are connected to the corresponding gas-distributing collector by means of flexible pipelines 10 and are installed with variable ratios between the widths of the nozzles 5 and the pitch of their installation, increasing in the first section 7 from 1:50 to 1: 8, and in the second section 8 from 1:20 to 2: 1.
    the ratio of 1:10, the fourth - with the ratio of 1: 6 and fifth - with the ratio of 1: 2. 7. A device for drying ceramic products, containing a chamber with a conveyor inside for transporting products and a gas-distributing collector located above the conveyor with a system of nozzles directed perpendicular to the conveyor, which has 1di. variable width and installed on guides with a predetermined pitch, characterized in that, in order to reduce energy consumption, reduce the drying time to increase its quality, the device is made in two sections and contains a second gas distribution collector located under the conveyor, and the nozzles of both collectors are connected to the corresponding gas distribution manifold by means of flexible pipelines and are made with variable tolerance between the nozzles and the installation step, which increases in the first section from 1:50 to 1: 8, and second - from 1:20 to 2: 1.
    Q
    five
    five
    0
    The chamber 1 also houses the suction elements 1 j for draining the spent coolant, connected to the intake manifold 12, and the fan 13. The system of co-engines 5 and the suction elements 11 can be made in the form of modules 14, therefore the distance between the nozzles (pitch) It is controllable.
    In section E of continuous blow-off of products there are located a supply duct of 15 DH of heat-transfer agent, collecting duct 16, and a recirculation fan 1 1 1 7.
    The method of multistage drying of ceramic products is carried out as follows.
    The ceramics 3 to be dried are mounted on the conveyor 2, moving with a constant speed. During the forward movement of the bodies 3 on the conveyor 2 through the system of nozzles 5 serves coolant. At the same time, the same product is subjected to a heat carrier blowing, then its absence for a certain time determined by the value of a and and and the speed of movement of Tpaiicnop - tera.
    To dry products made of .ipyroi o material and another form, a system of nozzles 5 is installed in a direction of 6 by means of a distance from each other, depending on the corresponding specified conditions. At the same time, drying of ceramic products is carried out with a varying ratio of the time of supply of heat-transfer agent to the cut-off time in each cycle.
    According to the invention, the ratio of the heat carrier supply time to the cut-off time is continuously increased from cycle to cycle by reducing the cut-off time, and the ratio of the coolant supply time to the cut-off time is increased, for example, by at least two times; the ratio of the coolant supply time to the cut-off time is increased linearly or parabolic, or stepwise with a number of steps of not less than five, while in the first step the blowing starts at the ratio of the coolant supply time to the cut-off time equal to 1:30 equal to 1:24. the second stage is completed at a ratio of 1:14, the third at a ratio of 1:10, the fourth at a ratio of 1: 6 and the fifth at a ratio of 1: 2.
    Example 1. Ceramic products in the shape of a parallelepiped with dimensions of 250/60/125 mm with circular transverse holes and a hollow space, the volume of which is 30% of the total volume of the product, are installed in a chamber with a narrow side transversely directed along with two. x sides of the flow coolant. The products are made of clay with the following composition. % SiO. 58.3; AloO.-i 15.9; ReaOz 7.1; Cad 5.6; MgO 1.5. Na.O 0.8; Kao 2.2; SO.- 0.1. Losses during hardening - 8.4% and particle size distribution: over 2 mm - 0.5%, from 2 to 0.05 mm - 12%, from 0.05 to 0.005 mm - 46.0% and less than 0.005 mm - 41.5-%.
    The average humidity of each product when the pilot plant is turned on is 22%. The coolant for the blower has a temperature of 90 ° C. relative humidity of 10% and speed of 12 m / s. The blowing process occurs step by step. stepwise increase in the ratio in each cycle during the processes of the day, with the ratio between the width of coii. ia a and the distance between the nozzles are “incrementally increased in five steps.
    Phi this in the first stage, it is 1:. (). . in the second - 1:24. in the third - 1:14, and the fourth - 1:10, and in paragraph 1 - 1: 6.
    The blowing time in each cycle is constant and is 5 seconds for the whole drying process. During the first 30 minutes of the drying process, the ratio between the blowing time and the cut-off time is 1:30 for 1kl. i.e., after 5 seconds, 2.5 min of cut-off time follows. From 30 to 16 minutes from the start of the drying process, the ratio is 1:24. from 60 to 90 minutes it is 1:14, from 90 to 120 minutes - 1:10. from 120 to 240 minutes - 1: 6. For a period of 240 minutes, the products of the spring are up to a moisture content of 8%.
    It has been established that the strength of the products in the drying process is gradually increased. Between 180 and 190 minutes of the drying process at a moisture content of approximately 13% of the product, the pressure of 4 kg / cm is already maintained.
    0 In the material, no cracks are observed until the drying process. Extras Drying from 8 to 2% humidity can also be carried out with a coolant without blowing a coolant.
    5 Example 2 and 3. The same products with the same mustache. yuw x. as indicated in example I., dried out to a moisture content of 8%. moreover, the ionization between the width and con. ia and the distance between sop. 1 k varies parabolicly - from 1:50 to 1: 2. correspondingly, according to the linear law, from 1:50 to 1: 2 with a constant blowing time in each cycle equal to 20 s. Drying time 260 min and 235 min.
    It has been found that no cracks form in the material. Duration of drying in
    5 of both cases x is almost equal to the cauldron in example 1.
    The described methods of multistage drying of ceramic products and a device for drying ceramic products allow to reduce energy consumption, reduce the time of cyinKn and improve its quality.
    7-T
    fig.g
    ABOUT
    st
    fig.Z
    权利要求:
    Claims (1)
    [1]
    For drying products from another material and another shape, the nozzle system 5 is mounted on the guides 6 at a certain distance from each other, depending on the corresponding given technological conditions. In this case, drying of ceramic products is carried out with a varying ratio of the coolant supply time to the cutoff time in each cycle.
    According to the invention, the ratio of the coolant supply time to the cutoff time is continuously increased from cycle to cycle by reducing the cutoff time, the ratio of the coolant supply time to the cutoff time being increased, for example, by at least two times; the ratio of the coolant supply time to the cutoff time is increased according to a linear law or parabolic, or stepwise with the number of steps at least five, while in the first step, blowing is started when the ratio of the coolant supply time to the cutoff time is 1:30 and end when the ratio is equal to 1:24. the second stage is completed at a ratio of 1:14, the third at a ratio of 1:10, the fourth at a ratio of 1: 6 and the fifth at a ratio of 1: 2.
    Example 1. Ceramic products in the form of a parallelepiped with dimensions 250/60/125 mm with round transverse openings and a hollow space, the volume of which is 30% of the total volume of the product, is installed in the chamber with the narrow side across the heat carrier flow sequentially directed from both sides. Products are made of clay with the following composition,% SiO->58.3; ABO 3 15.9; Fe, O 3 7.1; CaO 5.6; MgO 1.5, Na-, 0.8; K 2 O 2.2; SO, 0.1. Losses during hardening - 8.4% and particle size distribution: over 2 mm - 0.5%, from 2 to 0.05 mm - 12%, from 0.05 to 0.005 mm - 46.0% and less than 0.005 mm - 41.5%.
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    同族专利:
    公开号 | 公开日
    FR2541266A1|1984-08-24|
    IT8349461D0|1983-12-07|
    DD211938A5|1984-08-01|
    IT1212904B|1989-11-30|
    DE3245282A1|1984-06-07|
    FR2541266B3|1987-05-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1997826A|1929-10-14|1935-04-16|Arthur E Krick|Process for drying control|
    DE636508C|1933-02-02|1936-10-14|Georg Zimmer|Device for regulating the moisture content of tobacco or the like.|
    US2296546A|1941-03-15|1942-09-22|Crossett Lumber Company|Method of artificially seasoning lumber|
    CH479845A|1968-02-09|1969-10-15|Bauwerk Bodenbelagsind Ag|Process and device for drying sawn timber|
    DE2109071C3|1971-02-25|1981-08-13|Manfred 6312 Laubach Leisenberg|Conveying and drying device for ceramic bricks|
    DE2249916A1|1972-10-12|1974-04-18|Netzsch Maschinenfabrik|DEVICE FOR DRYING CERAMIC MOLDINGS|SE8803651L|1988-10-13|1990-04-14|Svecia Silkscreen Maskiner Ab|DRYING WITH BASKET NOZZLE|
    FR2652410A1|1989-09-27|1991-03-29|Lheritier Robert|Method for drying flat products made from ceramic paste and dryer system implementing it|
    DE4336085A1|1993-10-22|1995-04-27|Atotech Deutschland Gmbh|Method for removing liquid from the surface of a wetted material to be treated and arrangement for carrying out the method|
    FR3047062B1|2016-01-27|2019-08-02|Societe Constructions Industrielles Et Metalliques De Sable |METHOD AND APPARATUS FOR DRYING A POROUS MATERIAL, BY INTERMITTENCE, IN WHICH THE DRYING PERIODS COINCIDE WITH THE INITIAL ACCESSIBILITY PERIOD OF DRYING|
    CN108007155B|2017-12-01|2019-09-27|合江县华艺陶瓷制品有限公司|Blank drying line and blank convey drying production line|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19823245282|DE3245282A1|1982-12-07|1982-12-07|Process and device for drying articles|
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