CN114485155A - Roller kiln for calcining calcium oxide at high temperature - Google Patents
Roller kiln for calcining calcium oxide at high temperature Download PDFInfo
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- CN114485155A CN114485155A CN202210106646.2A CN202210106646A CN114485155A CN 114485155 A CN114485155 A CN 114485155A CN 202210106646 A CN202210106646 A CN 202210106646A CN 114485155 A CN114485155 A CN 114485155A
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- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 239000000292 calcium oxide Substances 0.000 title claims abstract description 25
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000001354 calcination Methods 0.000 title abstract description 12
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 68
- 230000005540 biological transmission Effects 0.000 claims abstract description 64
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 50
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 34
- 238000007599 discharging Methods 0.000 claims abstract description 34
- 239000003345 natural gas Substances 0.000 claims abstract description 25
- 238000013519 translation Methods 0.000 claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 238000003837 high-temperature calcination Methods 0.000 claims abstract description 20
- 238000002485 combustion reaction Methods 0.000 claims abstract description 15
- 230000001276 controlling effect Effects 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 238000010304 firing Methods 0.000 claims abstract description 7
- 238000005086 pumping Methods 0.000 claims abstract description 7
- 239000000779 smoke Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 27
- 230000001681 protective effect Effects 0.000 claims description 14
- 229920003225 polyurethane elastomer Polymers 0.000 claims description 13
- 238000012544 monitoring process Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000010583 slow cooling Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 230000007547 defect Effects 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000012806 monitoring device Methods 0.000 claims description 3
- 239000011819 refractory material Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 2
- 230000000007 visual effect Effects 0.000 claims 1
- 230000004913 activation Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000009365 direct transmission Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
- F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
- F27B9/2407—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/3005—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/36—Arrangements of heating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/38—Arrangements of devices for charging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/39—Arrangements of devices for discharging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/40—Arrangements of controlling or monitoring devices
Abstract
The invention discloses a roller kiln for high-temperature calcination of calcium oxide, which comprises roller kiln equipment, wherein the roller kiln equipment comprises a kiln feeding machine, a roller kiln, a kiln discharging machine, a turning machine, a translation mechanism, a discharging machine, a charging machine and a return line; the roller kiln comprises a kiln body, a transmission system, a control system, a combustion system and an air supply and exhaust system; the kiln body is a box-type vault assembly structure; the transmission system is used for regulating and controlling automatic output in the kiln body; the control system is used for regulating and controlling the related work dynamic output of the kiln body; the combustion system ensures that the natural gas on the kiln body is clean, and the pressure and the heat value are required to be stabilized in a required range so as to stabilize the firing temperature and atmosphere of the kiln body and finally ensure the product quality; the exhaust system is divided into a combustion-supporting air system, a smoke exhaust fan, a hot air pumping system and a rapid cooling air system; calcium carbonate is calcined by the kiln, so that the calcium carbonate is more convenient and faster through automatic control, and the calcination temperature is controllable, so that the activation rate of the calcium carbonate is improved.
Description
Technical Field
The invention relates to the technical field of roller kilns, in particular to a roller kiln for calcining calcium oxide at high temperature.
Background
The roller kiln is a light continuous industrial kiln, which uses rotating rollers as blank carrier, and the products to be burnt are placed on many horizontal refractory rollers with very close intervals and are transferred from the head to the tail of the kiln by the rotation of the rollers. Because of its automatic control, it is widely used in the rapid firing of ceramic substrates, chemical powder and other products.
The calcium oxide is prepared by calcining the calcium carbonate at high temperature, the calcium carbonate is sensitive to temperature (898-1100 ℃), the decomposition speed is different according to the change of the temperature, the calcining temperature of the traditional (existing) calcium carbonate is difficult to control, and the existing calcining temperature is ubiquitous in unburnt and overburnt, so that the quality of the generated calcium oxide is influenced.
Disclosure of Invention
The embodiment of the application calcines roller kilns of calcium oxide through providing a high temperature, calcines calcium carbonate through the kiln, makes it more convenient through automatic control, and it is controllable to calcine the temperature to improve the activation rate of calcium carbonate.
The embodiment of the application provides a roller kiln for high-temperature calcination of calcium oxide, which comprises roller kiln equipment, wherein the roller kiln equipment comprises a kiln feeding machine, a roller kiln, a kiln discharging machine, a turning machine, a translation mechanism, a discharging machine, a charging machine and a return line;
feeding the materials into a kiln machine, and conveying the materials filled with calcium carbonate to a roller kiln;
the roller kiln is connected with the kiln feeding machine and is used for high-temperature calcination of calcium carbonate materials; the roller kiln comprises a kiln body, a transmission system, a control system, a combustion system and an air supply and exhaust system;
the kiln body is a box body type, and is a vault steel structure assembly part made of high-temperature refractory materials and heat-insulating materials;
the transmission system is used for regulating and controlling automatic output in the kiln body;
the control system is provided with a master control cabinet, and a temperature control instrument, a closed-circuit television monitoring device, a kiln simulation control panel, a transmission control panel and a fan operation control system are arranged on the master control cabinet and are used for regulating and controlling the related work dynamic output of a kiln body;
the combustion system ensures that the natural gas on the kiln body is clean, and the pressure and the heat value are required to be stabilized in a required range so as to stabilize the firing temperature and atmosphere of the kiln body and finally ensure the product quality;
the exhaust system comprises a combustion-supporting air system, a smoke exhaust fan, a hot air pumping system and a rapid cooling air system, wherein the hot air pumping system also comprises rapid cooling air, slow cooling heat exchange hot air and tail cooling hot air;
the discharging machine is connected with the roller kiln;
the turning machine is connected with the kiln discharging machine and is a 90-degree turning machine;
the two translation mechanisms are respectively connected with the unloader and the loader;
the two unloading machines are connected with the translation structure;
the charging machine is connected with the discharging machine, and the charging machine is provided with two charging machines;
and the return line is positioned below the charging machine and used for conveying materials.
The control system is further divided into a temperature control system, a transmission control system, a fan control system, a pressure monitoring system, a safety protection system and an industrial control system;
temperature control, namely PID automatic control is adopted;
the transmission control is realized by configuring a control switch through a transmission motor;
monitoring the pressure, namely monitoring the pressure in the kiln body by an inclined tube micro-pressure meter which is arranged at the opening of the front and rear kiln holes in the kiln body;
when accident hidden danger and equipment failure occur, the system not only gives out sound and light alarm, but also automatically responds to cut off natural gas supply to prevent accidents;
and the industrial control system is used for dynamically outputting the work of the kiln body.
Further kiln internal side adds and establishes fire guard and lower fire guard to the internal temperature of control kiln makes the internal temperature of kiln stable and prevent the production of burning defect, and the whole kiln sets up multichannel fire guard and fire guard.
The combustion system is further composed of a natural gas filtering pressure stabilizing system, a pressure switch, a kiln upper supporting pipeline, a burner and an automatic control valve;
the filtering pressure stabilizing system mainly comprises a filter, a pressure reducing valve, a safety valve, an electromagnetic valve, a high-low pressure switch and a part of manual ball valves;
the pressure switch is divided into a maximum pressure switch and a minimum pressure switch;
the automatic control valves are used for controlling the natural gas flow in groups;
the burner adopts a natural gas burner, and a ball valve is arranged in front of the burner and used for opening or closing the burner.
And the kiln feeding machine and the kiln discharging machine are respectively composed of a speed reducing and changing machine, a rack, a bevel gear, a transmission shaft, an oil basin, a protective cover, a transmission fixing seat, a wall thickness seamless steel pipe, a driven supporting plate and a lifting mechanism.
The return line is further composed of a speed reducing and changing machine, a rack, a bevel gear, a transmission shaft, an oil basin, a protective cover, a transmission bearing seat, a driven edge C-shaped groove, a polyurethane rubber wheel and a wheel shaft.
The turning machine is further composed of a speed reducing and changing machine, a rack, a bevel gear, a transmission shaft, an oil basin, a protective cover, a transmission bearing seat, an active edge C-shaped groove, a passive edge C-shaped groove, a polyurethane rubber wheel, a wheel shaft, a large chain wheel, a small chain wheel and a chain.
The discharging machine is further composed of a speed reducing and changing machine, a rack, a bevel gear, a transmission shaft, an oil basin, a protective cover, a transmission bearing seat, a driven edge C-shaped groove, a polyurethane rubber wheel, a wheel shaft, a large chain wheel, a small chain wheel and a chain.
The translation mechanism is further composed of a speed reducing and changing machine, a rack, a bevel gear, a transmission shaft, an oil basin, a protective cover, a transmission bearing seat, a driven edge C-shaped groove, a polyurethane rubber wheel, a wheel shaft, a large chain wheel, a small chain wheel and a chain.
The charging machine is further arranged on the upper part of the return line and consists of a speed reducing and changing machine, a storage bin, a steel platform, a belt conveyor and a discharging chute hopper.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: the two charging machines respectively load calcium carbonate materials, the calcium carbonate materials are transferred to the kiln feeding machine through the translation mechanism so as to enter the roller kiln for high-temperature calcination, the high-temperature calcination of the calcium carbonate materials is realized along with the automatic control of the roller kiln, calcium oxide is collected, then the calcium carbonate materials are transferred to the translation mechanism through the turning machine, the calcium carbonate materials are separately transferred to the discharging machine through the translation mechanism so as to realize the unloading of the calcium oxide, and the calcium carbonate is cyclically calcined by charging through the charging machine after the unloading is finished; calcium carbonate is calcined by the kiln, so that the calcium carbonate is more convenient and faster through automatic control, and the calcination temperature is controllable, so that the activation rate of the calcium carbonate is improved.
Drawings
FIG. 1 is a schematic representation of the calcined structure of calcium carbonate according to the present application;
FIG. 2 is a flow chart of the calcium carbonate calcination process of the present application;
FIG. 3 is a bottom view of the roller kiln apparatus of FIG. 1;
FIG. 4 is a schematic view of the kiln feeder of FIG. 1;
FIG. 5 is a schematic structural view of the roller kiln shown in FIG. 1;
FIG. 6 is a schematic view of the structure of the bending machine of FIG. 1;
FIG. 7 is a schematic view of the translation mechanism of FIG. 1;
FIG. 8 is a schematic view of the unloader of FIG. 1;
FIG. 9 is a schematic view of the structure of the loader of FIG. 1;
fig. 10 is a schematic view of the structure of the return line in fig. 1.
In the figure: 10 kiln feeding machines, 20 roller kilns, 30 kiln discharging machines, 40 turning machines, 50 translation mechanisms, 60 discharging machines, 70 charging machines, 80 roller kiln equipment and 90 return lines.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-10, a roller kiln for high-temperature calcination of calcium oxide comprises roller kiln equipment 80, wherein the roller kiln equipment 80 comprises a kiln feeding machine 10, a roller kiln 20, a kiln discharging machine 30, a turning machine 40, a translation mechanism 50, a discharging machine 60, a charging machine 70 and a return line 90;
feeding the material into a kiln machine 10, and conveying the material filled with calcium carbonate to a roller kiln 20;
the roller kiln 20 is connected with the kiln feeding machine 10 and is used for high-temperature calcination of calcium carbonate materials; wherein, the roller kiln 20 comprises a kiln body, a transmission system, a control system, a combustion system and an air supply and exhaust system;
the kiln body is a box-type vault steel structure assembly part made of high-temperature refractory materials and heat-insulating materials, the kiln body is formed by assembling a transmission system, a natural gas combustion system, an air supply system, an automatic control system, a charging system of a kiln inlet system and a kiln outlet system, a discharging system and conveying system equipment which are matched, and the outer side of the kiln body is decorated by adopting a delta 1.5mm cold plate after being subjected to paint baking, so that the whole kiln is attractive and elegant; the kiln body foot rest adopts a pulley structure and is set as a static point, so that the kiln body can freely slide towards the kiln head when being heated to expand or cooled to contract;
the transmission system is used for the automatic switching function of commercial power/power generation and the function of transmission back and forth, and does not have the commercial power direct transmission function of a frequency converter. Under the control of the frequency converter, when the transmission section driven by the frequency converter is in an accident of brick stacking and the like, the accident section and the previous transmission are in a reciprocating swing state, and the transmission behind the accident section still continues to advance;
the control system is provided with a master control cabinet, and a temperature control instrument, a closed circuit television monitoring device, a kiln analog control panel, a transmission control panel, a fan operation control system and the like are arranged on the master control cabinet. All lines of the kiln adopt a double-groove cable bridge, namely a power line is separated from a control line, and a heat dissipation hole and a dust cover are arranged in a supporting groove;
the combustion system is mainly composed of a natural gas filtering and pressure stabilizing system, a pressure switch, a kiln upper branch pipeline, a burner, an automatic control valve and the like, the combustion system enables natural gas on a kiln body to be clean, and pressure and a heat value are required to be stabilized within a required range so as to stabilize the firing temperature and atmosphere of the kiln body and finally ensure the product quality;
the exhaust system is divided into a combustion-supporting air system, a smoke exhaust fan, a hot air pumping system and a rapid cooling air system;
the kiln discharging machine 30 is connected with the roller kiln 20;
the turning machine 40 is connected with the kiln discharging machine 30, and the turning machine 40 is a 90-degree turning machine and used for turning in the material transferring process;
the two translation mechanisms 50 are connected with the turning machine 40, and the two translation mechanisms 50 are respectively connected with the unloading machine 60 and the charging machine 70 and divide materials into two conveying lines for transferring;
the discharging machines 60 are connected with the translation structure 50, and the discharging machines 60 are two and used for discharging the calcium oxide obtained by calcination;
the charging machine 70 is connected with the discharging machine 60, and two charging machines 70 are arranged, so that the calcium carbonate materials are loaded and transported again and are sent to the kiln feeding machine 10 to realize calcination;
and a return line 90 is positioned below the charging machine 70 and used for conveying materials.
The transmission system is a control mode of helical gear segmented transmission and variable frequency speed regulation.
The transmission system provides power through a transmission motor, the transmission motor is driven by a wide-width variable-frequency transmission motor (2.2KW), and 1 motor is driven per 2 sections of the box body. The jacket assembly adopts a high-quality bearing steel single-hole seat; all gear materials are 20 CrMnTi.
The control system comprises temperature control, transmission control, fan control, pressure monitoring, a safety protection system and an industrial control system;
the temperature control adopts a temperature regulator PID for automatic control, and belongs to decentralized control; the control response speed is high, and the temperature control precision is high. The temperature control is realized by adjusting the natural gas quantity by an automatic control valve according to the instruction of a temperature regulator. Only the natural gas amount is changed, the combustion-supporting air amount is constant, and the constant combustion-supporting air amount can meet the requirement that when the temperature is raised, the automatic control valve is opened to the maximum extent to ensure full combustion;
the transmission control is realized by configuring a control switch through a transmission motor, and the field control can be performed when needed; the fan control is used for regulating and controlling the kiln smoke discharge, the front combustion supporting, the humidity discharging fan frequency conversion and the transmission frequency conversion;
monitoring the pressure, namely monitoring the pressure in the kiln body by an inclined tube micro-pressure meter which is arranged at the opening of the front and rear kiln holes in the kiln body;
when accident hidden danger and equipment failure occur, the system not only gives out sound and light alarm, but also automatically responds to cut off natural gas supply to prevent accidents;
the industrial control system is used for monitoring and controlling the transmission frequency of the kiln body, uniformly adjusting the frequency of all fans of the kiln body, controlling the temperature of the kiln body, controlling the firing curve of the kiln body, inputting and outputting the firing formula, and recording and outputting equipment fault alarm; fault processing prompt; the method comprises the steps of safe operation procedures of a kiln body, a kiln body yield report and a simulated calcium carbonate material trend chart.
The internal side of kiln adds and establishes fire board and lower fire wall to the internal temperature of control kiln makes the internal temperature of kiln stable and prevents the production of burning defect, and the whole kiln sets up multichannel fire board and fire wall.
The transmission system is provided with an emergency generator to prevent sudden power failure.
The filtering and pressure stabilizing system mainly comprises a filter, a pressure reducing valve, a safety valve, an electromagnetic valve, a high-low pressure switch and a part of manual ball valves, natural gas sent by a workshop main pipe is filtered by the filter and then automatically stabilized in a required range by an automatic pressure regulator, and the pneumatic safety valve is opened or closed by receiving an opening or closing instruction sent by a control system, so that the safety protection effect is achieved.
The pressure switch is divided into a maximum pressure switch and a minimum pressure switch, and when the natural gas pressure exceeds the required pressure or is lower than the required pressure, the control system sends out an instruction to close the pneumatic safety valve. A bypass system is arranged so as to maintain and replace parts, and a bleeding valve is arranged at the tail of a natural gas main pipe on the kiln and used for replacing air in the pipe.
The automatic control valves are used for controlling the natural gas flow in groups to achieve the purpose of regulating the temperature of the groups. Generally, each automatic control valve controls 8/12 burners, each two burners are divided into one group, two control groups are arranged on the upper roller and the lower roller, and each group consists of an automatic control valve and three manual ball valves. The self-control valve is opened or closed under the instruction of the temperature regulator. A manual ball valve is arranged in front of each automatic control valve, and when the group of natural gas valves are not used, the ball valves are closed. When the automatic control valve needs to be cleaned and maintained, the bypass can directly supply air. Each group sends natural gas to each burner by a corresponding branch pipeline.
The burner adopts a natural gas burner, and is characterized in that natural gas and combustion-supporting air are uniformly mixed, the combustion is sufficient, the tempering is not carried out, the injection speed is high, and the purposes of saving fuel and uniform temperature of the cross section in the kiln are achieved. And a ball valve is arranged in front of the burner and used for opening or closing the burner.
The combustion-supporting air system is provided with four branch pipes at four corners of the kiln body through combustion-supporting air pipelines, so that the combustion-supporting air can be preheated conveniently, and the upper combustion-supporting air pipe and the lower combustion-supporting air pipe form a loop, so that the left pressure and the right pressure are balanced;
the outlet of the smoke exhaust fan is provided with a thermocouple for monitoring the smoke exhaust temperature, and the temperature is displayed by a temperature polling instrument;
the hot air pumping system also comprises quick cold air, slow cooling heat exchange hot air and tail cold hot air; the fast cooling wind is discharged from the slow cooling zone, the wind heated by the fast cooling zone entering the kiln is discharged by the hot air extractor in the slow cooling zone in sections, the slow cooling zone adjacent to the fast cooling zone is not provided with a drawing opening, and every two sections are provided with a row of outlets. Discharged by a hot air extractor and sent into a dryer; the slow cooling heat exchange hot air is extracted, and the slow cooling air belongs to indirect cooling and is extracted by a draught fan; tail cooling is realized by blowing air into the kiln and discharging heated air out of the kiln through a self-discharging pipe;
and in the quenching air system, cold air is blown in from two sides of the pipe simultaneously, 8 blowing pipes are arranged at each section, and the flow is controlled by a manual valve and a frequency converter.
The kiln in-out machine is formed by assembling a speed reducing and changing machine, a rack, a bevel gear, a transmission shaft, an oil basin, a protective cover, a transmission fixing seat, a wall-thickness seamless steel pipe, a passive supporting plate, a lifting mechanism and the like.
The return line 90 is formed by assembling a speed reducing and changing machine, a rack, a bevel gear, a transmission shaft, an oil basin, a protective cover, a transmission bearing seat, a driven edge C-shaped groove, a polyurethane rubber wheel and a wheel shaft, the distance between the driven edge C-shaped groove and the polyurethane rubber wheel is 150mm, and the total length of the return line is 208 m.
The turning machine 40 is assembled by a speed reducing and changing machine, a rack, a bevel gear, a transmission shaft, an oil basin, a protective cover, a transmission bearing seat, an active side C-shaped groove, a passive side C-shaped groove, a polyurethane rubber wheel, a wheel shaft, a large chain wheel, a small chain wheel and a chain, and the distance between the two is 150 mm.
The unloader 60 is assembled by a speed reducing and changing machine, a frame, a helical gear, a transmission shaft, an oil basin, a protective cover, a transmission bearing seat, a driven edge C-shaped groove, a polyurethane rubber wheel, a wheel shaft, a large chain wheel, a small chain wheel and a chain, and the distance is 150 mm.
The charging machine 70 is arranged at the upper part of the return line, discharges materials to a flange belt conveyor through a stock bin, conveys the materials to a discharging chute, when the saggar reaches a designated position, the belt conveyor works, the belt conveying time is controlled by the capacity of the saggar, and the mechanism is assembled by a speed reducing machine, the stock bin, a steel platform, the belt conveyor, a discharging chute and the like.
During actual operation of the embodiment of the present application, the two charging machines 70 load the calcium carbonate material respectively, and the calcium carbonate material is transported to the kiln feeding machine 10 through the translation mechanism 50, so as to enter the roller kiln 20 for high temperature calcination, and with automatic control of the roller kiln 20, high temperature calcination of the calcium carbonate material is realized, so as to collect calcium oxide, and then the calcium oxide is transported to the translation mechanism 50 through the turning machine 40, and is separately transported to the discharging machine 60 through the translation mechanism 50, so as to realize unloading of the calcium oxide, and after unloading, the charging machine 70 is charged again to calcine the calcium carbonate in this cycle.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages: calcium carbonate is calcined by the kiln, so that the calcium carbonate is more convenient and faster through automatic control, and the calcination temperature is controllable, so that the activation rate of the calcium carbonate is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a roller kilns of high temperature calcination calcium oxide, includes roller kilns equipment which characterized in that: the roller kiln equipment comprises a kiln feeding machine, a roller kiln, a kiln discharging machine, a turning machine, a translation mechanism, a discharging machine, a charging machine and a return line;
feeding the materials into a kiln machine, and conveying the materials filled with calcium carbonate to a roller kiln;
the roller kiln is connected with the kiln feeding machine and is used for high-temperature calcination of calcium carbonate materials; the roller kiln comprises a kiln body, a transmission system, a control system, a combustion system and an air supply and exhaust system;
the kiln body is a box body type, and is a vault steel structure assembly part made of high-temperature refractory materials and heat-insulating materials;
the transmission system is used for regulating and controlling automatic output in the kiln body;
the control system is provided with a master control cabinet, and a temperature control instrument, a closed circuit television monitoring device, a kiln analog control board, a transmission control board and a fan operation control system are arranged on the master control cabinet and are used for regulating and controlling the related work dynamic output of a kiln body;
the combustion system ensures that the natural gas on the kiln body is clean, and the pressure and the heat value are required to be stabilized in a required range so as to stabilize the firing temperature and atmosphere of the kiln body and finally ensure the product quality;
the exhaust system comprises a combustion-supporting air system, a smoke exhaust fan, a hot air pumping system and a rapid cooling air system, wherein the hot air pumping system also comprises rapid cooling air, slow cooling heat exchange hot air and tail cooling hot air;
the discharging machine is connected with the roller kiln;
the turning machine is connected with the kiln discharging machine and is a 90-degree turning machine;
the two translation mechanisms are respectively connected with the unloader and the loader;
the two unloading machines are connected with the translation structure;
the charging machine is connected with the discharging machine, and the charging machine is provided with two charging machines;
and the return line is positioned below the charging machine and used for conveying materials.
2. The roller kiln for high-temperature calcination of calcium oxide according to claim 1, wherein: the control system comprises temperature control, transmission control, fan control, pressure monitoring, a safety protection system and an industrial control system;
temperature control, namely adopting a temperature regulator PID for automatic control;
the transmission control is realized by configuring a control switch through a transmission motor;
monitoring the pressure, namely monitoring the pressure in the kiln body by an inclined tube micro-pressure meter which is arranged at the opening of the front and rear kiln holes in the kiln body;
when accident hidden danger and equipment failure occur, the system not only gives out audible and visual alarm, but also automatically responds to cut off natural gas supply to prevent accidents;
and the industrial control system is used for dynamically outputting the work of the kiln body.
3. The roller kiln for high-temperature calcination of calcium oxide according to claim 1, wherein: kiln internal side adds establishes fire board and lower fire wall to the internal temperature of control kiln makes the internal temperature of kiln stable and prevents the production of burning defect, and the whole kiln sets up multichannel fire board and fire wall.
4. The roller kiln for high-temperature calcination of calcium oxide according to claim 1, wherein: the combustion system consists of a natural gas filtering and pressure stabilizing system, a pressure switch, a kiln upper branch pipeline, a burner and an automatic control valve;
the filtering pressure stabilizing system mainly comprises a filter, a pressure reducing valve, a safety valve, an electromagnetic valve, a high-low pressure switch and a part of manual ball valves;
the pressure switch is divided into a maximum pressure switch and a minimum pressure switch;
the automatic control valves are used for controlling the flow of the natural gas in groups;
the burner adopts a natural gas burner, and a ball valve is arranged in front of the burner and used for opening or closing the burner.
5. The roller kiln for high-temperature calcination of calcium oxide according to claim 1, wherein: the kiln inlet machine and the kiln outlet machine are respectively composed of a speed reducing and changing machine, a rack, a bevel gear, a transmission shaft, an oil basin, a protective cover, a transmission fixing seat, a wall thickness seamless steel pipe, a passive supporting plate and a lifting mechanism.
6. The roller kiln for high-temperature calcination of calcium oxide according to claim 1, wherein: the return line is composed of a speed reducing and changing machine, a rack, a bevel gear, a transmission shaft, an oil basin, a protective cover, a transmission bearing seat, a driven edge C-shaped groove, a polyurethane rubber wheel and a wheel shaft.
7. The roller kiln for high-temperature calcination of calcium oxide according to claim 1, wherein: the turning machine consists of a speed reducing and changing machine, a rack, a bevel gear, a transmission shaft, an oil basin, a protective cover, a transmission bearing seat, an active edge C-shaped groove, a passive edge C-shaped groove, a polyurethane rubber wheel, a wheel shaft, a large chain wheel, a small chain wheel and a chain.
8. The roller kiln for high-temperature calcination of calcium oxide according to claim 1, wherein: the unloader consists of a speed reducing and changing machine, a rack, a helical gear, a transmission shaft, an oil basin, a protective cover, a transmission bearing seat, a driven edge C-shaped groove, a polyurethane rubber wheel, a wheel shaft, a large chain wheel, a small chain wheel and a chain.
9. The roller kiln for high-temperature calcination of calcium oxide according to claim 1, wherein: the translation mechanism is composed of a speed reducing and changing machine, a rack, a helical gear, a transmission shaft, an oil basin, a protective cover, a transmission bearing seat, a driven edge C-shaped groove, a polyurethane rubber wheel, a wheel shaft, a large chain wheel, a small chain wheel and a chain.
10. The roller kiln for high-temperature calcination of calcium oxide according to claim 1, wherein: the charging machine is arranged on the upper part of the return line and consists of a speed reducing and changing machine, a storage bin, a steel platform, a belt conveyor and a discharging chute hopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210106646.2A CN114485155A (en) | 2022-01-28 | 2022-01-28 | Roller kiln for calcining calcium oxide at high temperature |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210106646.2A CN114485155A (en) | 2022-01-28 | 2022-01-28 | Roller kiln for calcining calcium oxide at high temperature |
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| CN114485155A true CN114485155A (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN204100788U (en) * | 2014-07-15 | 2015-01-14 | 黄冈市华窑中浩窑炉有限公司 | A kind of rare earth roller kilns |
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