CN203479034U - Calcining kiln system - Google Patents
Calcining kiln system Download PDFInfo
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- CN203479034U CN203479034U CN201320597588.4U CN201320597588U CN203479034U CN 203479034 U CN203479034 U CN 203479034U CN 201320597588 U CN201320597588 U CN 201320597588U CN 203479034 U CN203479034 U CN 203479034U
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Abstract
The utility model provides a calcining kiln system which comprises a kiln body, an ignition component, a detection component and a controller. The kiln body comprises a feeding port, a discharging port, an image collecting port and a burning port; the feeding port is formed in the top of the kiln body and the discharging port is formed in the bottom of the kiln body; the number of the burning port is at least one and each burning port is formed in a calcining zone and distributed along the outer circumference of the kiln body; the number of the image collecting port is at least one and each image collecting port is distributed along the outer circumference of the kiln body; the detection component comprises an image monitoring device arranged on the image collecting port and used for collecting flame images through the image collecting port and sending flame condition information according to the flame images; the controller is connected with the image monitoring device and used for receiving the flame condition information and controlling the ignition component to ignite according to the flame condition information; the ignition component is arranged on the burning port. According to the calcining kiln system, the calcining condition in a calcining kiln is monitored so that the production safety of the calcining kiln can be improved.
Description
Technical field
The utility model relates to calcining kiln technology, relates in particular to a kind of calcining kiln system.
Background technology
Calcining kiln is a kind of for firing the heat-processing equipment of product, and its application is very extensive, spreads all over the industries such as metallurgy, chemical industry, building materials and light industry.For different calcined materials and calcine technology, calcining kiln is divided into shaft kiln, rotary kiln, tunnel cave, down-draft kiln etc., wherein traditional shaft kiln adopts manual material loading, manual firing's mode conventionally, dependence experience is added fuel quantity and control combustion time, owing to cannot know the calcined state such as flame combustion state and kiln temperature in calcination process, when abnormal conditions occur, operating personnel also cannot learn in time, therefore, can cause a series of problems of operation machine safety problem ，Gei such as stopping production enterprise to bring huge loss.
Utility model content
The utility model provides a kind of calcining kiln system, can monitor the calcined state in calcining kiln, to improve the production security of calcining kiln.
The utility model embodiment provides a kind of calcining kiln system, comprising: kiln body, ignition part, detection part and controller;
Described kiln body comprises feeding port, discharge gate, IMAQ mouth and port; Described feeding port is arranged on the top of described kiln body, and described discharge gate is arranged on the bottom of described kiln body; The quantity of described port is at least one, and described in each, port is arranged on calcination area, along the excircle of described kiln body, arranges; The quantity of described IMAQ mouth is at least one, and described in each, described in IMAQ opening's edge, the excircle of kiln body is arranged;
Described detection part comprises image monitoring equipment, and described image monitoring equipment is arranged on described IMAQ mouth, for gathering flame image by described IMAQ mouth, and sends flame status information according to described flame image;
Described controller and described image monitoring equipment connection, for receiving described flame status information, and control described ignition part igniting according to described flame status information; Described ignition part is arranged on described port.
Calcining kiln system as above, described image monitoring equipment comprises image capture device and processor;
Camera lens in described image capture device is inner towards described kiln body, for obtaining flame image data, and by the data conversion equipment in described image capture device, described flame image data is carried out to data transaction;
Described processor is connected with the output of described data conversion equipment, for the flame image data after conversion are carried out to state analysis, and generates described flame status information.
Calcining kiln system as above, described detection part also comprises: upper level sensor and lower level sensor;
Described upper level sensor is arranged on described feeding port place, is fixed on described kiln body inwall, for detection of raw material position; Described lower level sensor is arranged on the below setting position of the described upper level sensor of distance;
Described controller is also connected with lower level sensor with described upper level sensor respectively, for according to described raw material Position Control material loading and discharge.
Calcining kiln system as above, also comprises: automatic charging parts;
Described automatic charging parts comprise and hold the hopper of calcining raw materials and for described hopper being sent to the conveyer of described kiln body under the control of described controller.
Calcining kiln system as above, described automatic charging parts also comprise electronic weighbridge;
The signal output part of described electronic weighbridge is connected with the signal input part of described controller, the weight information of the raw material holding in hopper for weighing, and described weight information is sent to described controller.
Calcining kiln system as above, described automatic charging parts are involving vibrations sieve also, and the material outlet of described vibratory sieve is arranged on described hopper top; The control signal input of described vibratory sieve is connected with the signal output part of described controller.
Calcining kiln system as above, also comprises: automatic discharge parts;
Described automatic discharge parts are arranged on described discharge gate below; The control signal input of described automatic discharge parts is connected with the signal output part of described controller.
Calcining kiln system as above, also comprises: gas generator;
Described gas generator is for generation of coal gas, and the coal gas escape pipe of described gas generator, in described port stretches into described kiln body, produces flame to coordinate with described ignition part by burning coal gas.
Calcining kiln system as above, also comprises: cleaner;
Described cleaner comprises dust excluding hood and air blast;
Described dust excluding hood is arranged on described kiln body top, and described air blast is air-breathing towards described dust excluding hood.
Calcining kiln system as above, described processor is data processing device DSP;
Described upper level sensor and lower level sensor are ultrasonic sensor.
The calcining kiln system that the utility model embodiment provides is by adopting the flame image in image monitoring equipment Real-time Collection calcination area, and carry out the analysis of flame status, when without flame status, by controller, controlling ignition part lights a fire, rekindle coal gas, can monitor the calcined state in calcining kiln, avoid because dust in kiln body causes more greatly fray-out of flame, but technical staff can not know the extinct event of flame in time, can improve the calcination product quality of calcining kiln.If flame extinguishes, but the unclosed valve of gas piping closes, dangerous property, and the technical scheme of the present embodiment has also improved production security to a certain extent.And adopt automatic charging parts and automatic discharge parts, can realize the automated production of calcination process, can enhance productivity.
The calcining kiln system that the utility model embodiment provides, substituted traditional manually-operated calcining mode of production, can realize automation production control, and the state of temperature in can Real-Time Monitoring calcination process, to control calcining heat, improve the quality of products, can also to flame status, analyze to gather the mode of flame image, can control in time ignition part and again light a fire when fray-out of flame, improve the security of producing.
Accompanying drawing explanation
The structural representation one of the calcining kiln system that Fig. 1 provides for the utility model embodiment;
The structural representation of the a-quadrant of the calcining kiln system that Fig. 2 provides for the utility model embodiment;
The structural representation of the controller of the calcining kiln system that Fig. 3 provides for the utility model embodiment.
The specific embodiment
The structural representation one of the calcining kiln system that Fig. 1 provides for the utility model embodiment, the structural representation of the a-quadrant of the calcining kiln system that Fig. 2 provides for the utility model embodiment, the structural representation of the controller of the calcining kiln system that Fig. 3 provides for the utility model embodiment.As shown in Figure 1 to Figure 3, this calcining kiln system can comprise: kiln body 1, ignition part 2, detection part and controller 4.
Calcining kiln kiln body 1 inside is divided into preheated zone, calcination area and cooled region conventionally, and for shaft kiln, it is distributed as and is followed successively by from top to bottom preheated zone, calcination area and cooled region.In calcination process, the raw material that is positioned at calcination area is heated more abundant, and temperature is higher, and it is lower to be positioned at the raw material heating temperature of preheated zone.After the calcination process in a stage finishes, the product that is positioned at the raw material calcining of calcination area enters cooled region and carries out coolingly, and the raw material that was originally positioned at preheated zone declines and enters calcination area and carry out high-temperature calcination.
Wherein, on the basis of the kiln body that kiln body 1 can be conventional in the prior art, improve, can comprise feeding port 11, discharge gate 12, IMAQ mouth 13 and port 14.Wherein, feeding port 11 is arranged on the top of kiln body 1, and the hopper of carrying calcining raw materials enters kiln body 1 from feeding port 11 and carries out material loading operation.Discharge gate 12 is arranged on the bottom of kiln body 1, and after calcination process finishes, discharge gate 12 can be opened under the control of controller 4, so that calcined product is got rid of kiln body 1 from discharge gate 12.The quantity of port 14 is at least one, and each port 14 is arranged on calcination area, along the excircle of kiln body 1, arranges.Preferably, port 14 is uniformly distributed along the excircle of kiln body 1, to improve the temperature uniformity coefficient of calcination area, improves the quality of calcination product.The quantity of IMAQ mouth 13 is at least one, and each IMAQ mouth 13 is arranged along the excircle of kiln body 1.The quantity of IMAQ mouth 13 can be corresponding one by one with port 14, also a port 14 near an IMAQ mouth 13 is set.
Traditional calcining manners all adopts burning coal to produce heat, but because coal burning can produce a large amount of smog, particulate matter and a large amount of pernicious gas, not only harmful, also pollute the environment.The calcining kiln system employing coal gas that the present embodiment provides is as fuel combustion to produce heat, and coal gas is easily produced on the one hand, and the pernicious gas that gas-fired produces is on the other hand less, can reduce environmental pollution.Corresponding, can lay gas piping at calcining zone, specifically can bracing frame and fixture be set at port 14, coal gas burner is fixed on to the position of port, the outlet of coal gas burner can slightly be stretched in kiln body 1, so that the flame of gas-fired enters in kiln body 1, reduces heat loss.
The calcining kiln system that the present embodiment provides also can adopt natural gas as calcinating fuel, corresponding, need lay natural gas in calcination area, and its mounting structure can be with reference to the setting to coal gas burner.
Further, the ignition part 2 that the present embodiment adopts can adopt natural gas as the igniting energy.If adopt coal gas as calcinating fuel, in calcination area except laying gaspipe line, also need to lay gas pipeline.
Above-mentioned detection part can comprise image monitoring equipment, and this image monitoring equipment is arranged on IMAQ mouth 13, for gathering flame image by IMAQ mouth 13, and sends flame status information according to flame image.This image monitoring equipment specifically can comprise image capture device 31 and processor 32.Wherein, the camera lens in image capture device 31, towards kiln body 1 inside, is taken the image of flame in real time, for obtaining flame image data, and by the data conversion equipment in image capture device 31, flame image data is carried out to data transaction.Processor 32 in image monitoring equipment is connected with the output of data conversion equipment, for the flame image data after conversion are carried out to state analysis, and generates flame status information.
Above-mentioned image capture device 31 is specifically as follows digital camera conventional in prior art, and for example digital industrial camera, specifically comprises camera lens, light sensation device and data conversion equipment.Data conversion equipment wherein can be data collecting card, light sensation device can be electric charge original paper (the Charge-coupled Divice that is coupled, CCD) or complementary metal oxide semiconductors (CMOS) (Complementary Metal Oxide Semiconductor, CMOS).The present embodiment adopts CCD as light sensation device, coordinates acquisition of image data with data collecting card.At calcination stage, camera lens is taken towards the flame of kiln body 1 inside from IMAQ mouth 13, and CCD Real-time Collection two dimensional image signal, by data collecting card, directly sends processor 12 to.Processor 32 is processed according to flame image data analysis, judges the current flame status that whether has, and also judges currently in fired state, still to have extinguished state.If processor 32 is judged current without flame, also extinguish state, generating flame status information is without flame status.
32 pairs of flame image data of processor are carried out the rule of state analysis and can be set by technical staff, also can be following implementation: flame image data are divided into a plurality of regions, calculate the mean value of each grey scale pixel value in regional, and as first threshold.Then processor 32 compares the gray value of each pixel in each region and this first threshold, and statistics is greater than the number of the pixel of this threshold value.If be greater than the number of the pixel of this threshold value, be greater than Second Threshold, think that these flame image data are for there being flame combustion state, otherwise think without fiery state.Processor 32 can adopt digital processing unit conventional in prior art (Digital Signal Processor is called for short DSP).
Controller 4 is connected with the output of image monitoring equipment in detection part, is also connected with the output of processor 32, for receiving flame status information, and controls ignition part 2 igniting according to flame status information.Ignition part 2 is arranged on port 14, concrete, and a port 14 arranges an ignition part 2.The flame status information receiving when controller 4 is without flame status, to ignition part 2, sends ignition signal, so that ignition part 2 starting ignitions are lighted flame again.Controller 4 can be the microprocessors such as AVR single-chip microcomputer, ARM single-chip microcomputer, can be also programmable logic controller (PLC) (Programmable Logic Controller is called for short PLC).
Wherein, ignition part 2 can adopt automatic ignition parts conventional in prior art, and the ignition part that for example adopts piezoelectric ceramic devices to make is arranged on the outlet of gas piping.When ignition part 2 receives the ignition signal of controller 4 transmissions, utilize piezo-electric effect to produce higher breakdown voltage of moment, to produce electric spark, fire fuel.
The course of work of above-mentioned calcining kiln system is: before calcining starts, calcining raw materials is packed in kiln body, then by technical staff, manually boot ignition part, or to ignition part, send igniting information by controller, so that ignition part igniting, the valve of the pipeline that simultaneously needs to turn on the gas-fire.Treat the equal starting ignition of each ignition part, and the coal gas generation flame that also all takes fire, in kiln body, the temperature of calcination area rises gradually.
In calcination process, image capture device Real-time Collection flame image data in image monitoring equipment, and treated device carries out state analysis, obtain currently for having flame status or without flame status, and send to controller.The state analysis result receiving when controller when without flame status, sends ignition signal to ignition part, so that ignition part starting ignition rekindles coal gas.
The technical scheme of the present embodiment is by adopting the flame image in image monitoring equipment Real-time Collection calcination area, and carry out the analysis of flame status, when without flame status, by controller, controlling ignition part lights a fire, rekindle coal gas, can monitor the calcined state in calcining kiln, avoid because the interior dust of kiln body 1 causes more greatly fray-out of flame, but technical staff can not know the extinct event of flame in time, can improve the calcination product quality of calcining kiln.If flame extinguishes, but the unclosed valve of gas piping closes, dangerous property, and the technical scheme of the present embodiment has also improved production security to a certain extent.
On the basis of technique scheme, in order further to improve the intelligent degree of calcining kiln system, above-mentioned detection part can also comprise temperature sensor, upper level sensor 33 and lower level sensor 34, for inserting highly of raw material being detected at feeding process.Wherein, upper level sensor 33 is arranged on feeding port 11 places, is fixed on kiln body 1 inwall, for detection of raw material position; Lower level sensor 34 is feeding port 11 places also, and are arranged on the below setting position of the upper level sensor 33 of distance.Upper level sensor 33 and lower level sensor 34 can be the emission sensors such as ultrasonic sensor, infrared sensor, and the present embodiment be take ultrasonic sensor and is elaborated as example.The temperature measuring probe of temperature sensor is arranged on kiln body 1 inside, for detection of the temperature of kiln body 1 inside, can adopt thermocouple.
Automatic charging parts can comprise and hold the hopper 51 of calcining raw materials and for hopper 51 is sent under the control at controller 4 to the conveyer 52 of kiln body 1 from loading area.Conveyer 52 can be electric hoist, between loading area and kiln body 1, can be provided with slide rail, so that electric hoist can slide on slide rail.Slide rail two ends can be respectively arranged with position sensor, for detection of the upward stroke of hopper 51 state and the horizontal throw state that puts in place that puts in place.On hopper 51, be provided with suspension ring, to hang on the hook of electric hoist.The control end of electric hoist is connected to the control signal that controller 4 sends to receive controller 4.
In addition, automatic charging parts also comprise electronic weighbridge 53, and the signal output part of electronic weighbridge 53 is connected with the signal input part of controller 4, for the weight information of the raw material that holds in weighing bucket 51, and this weight information are sent to 4 controllers.
Automatic charging parts are involving vibrations sieve 54 also, and the material outlet of vibratory sieve 54 is arranged on hopper 51 tops, and the control signal input of vibratory sieve 54 is connected with the signal output part of controller 4.
For feeding process, the present embodiment provides two kinds of material loading control modes, one, can take following material-uploading style: when material loading first, adopt artificial loading mode, manually control charging, transmit and calcining raw materials is inserted in kiln body 1, treat that controlling level arrives lower level sensor 34 places, lower level sensor 34 sends lower material level and puts signal in place to controller 4, afterwards, enters the automatic charging stage.Its two, for whole feeding process, all adopt automatic charging mode.
In the automatic charging stage, the course of work of calcining kiln system is: controller 4 receives the detection signal of upper level sensor 33, if this signal indication material level does not reach setting height, controller 4 sends control signal to vibratory sieve 54, control vibratory sieve 54 work, the calcining raw materials after sieve is shaken is poured in hopper 51.The weight of electronic weighbridge 53 real-time detecting material buckets 51, reaches setting weight value when weight being detected, to controller 4, sends signal, so that controller 4 is controlled vibratory sieve 54, quits work.Or this step can be also: electronic weighbridge 53 sends to weight data controller 4 in real time, after by controller 4, this weight data and setting weight value being compared, then transmits control signal to vibratory sieve 54.
After vibratory sieve 54 quits work, controller 4 sends enabling signal to the rising drive motors of conveyer 52, to drive hopper to rise, be ready to use in and detect put in place the sensor of state of hopper 51 upward strokes and send after the state of putting in place, controller is controlled rising drive motors and is stopped, and send enabling signal to the horizontal drive motor of conveyer 52, to drive hopper to move in the horizontal direction along slide rail.Be ready to use in and detect put in place the sensor of state of hopper 51 horizontal throws and send after the state of putting in place, now hopper 51 is positioned at the top of kiln body 1, and controller 4 level of control drive motors stop, and restart upper lifting motor, to drive hopper to decline and to enter in kiln body 1.In kiln body 1, be provided with baffle plate, can pull hopper 51 and tilt, calcining raw materials is poured in kiln body 1.Afterwards, along the mode contrary with above-mentioned stroke, feeded again in the hopper charging region that retransfers back, circulation execution feeding process.
After flame is lighted, temperature sensor sends the temperature in kiln body 1 to controller 4 in real time, so that controller 4 is controlled each ignition part 2 and gas pipeline valve, by control, lights a fire and puts out a fire the interior maintenance stationary temperature of kiln body 1.If for example calcining raw materials quartz, can be 1200 ℃ by the Temperature Setting of kiln body 1 interior calcination area.Image monitoring equipment is from IMAQ mouth 13 Real-time Collection flame images, and carries out state analysis.When there is fray-out of flame, image monitoring equipment sends without flame status signal to controller 4, so that controller 4 is controlled ignition part 2, again lights a fire.
In calcination process, when the temperature in controller 4 monitors kiln body 1 arrives design temperature, enter the discharge stage.Accordingly, calcining kiln system can also comprise automatic discharge parts 6, and these automatic discharge parts 6 are arranged on discharge gate 12 belows, and the control signal input of automatic discharge parts 6 is connected with the signal output part of controller 4.Automatic discharge parts 6 can be conveyer structure, and controller 4 is controlled discharge gate 12 and opened, and the drive motors of controlling in automatic discharge parts 6 starts, and calcined product enters automatic discharge parts 6 from kiln body 1, along conveyer belt, carries out and is collected.
In addition, in the process of discharge, the material level in kiln body 1 drops to lower than lower level sensor 34, descends level sensor 34 can send detection signal to controller 4, informs that material level is not enough, to re-execute material loading operation.
The fuel providing for above-described embodiment, can adopt coal gas conventional in existing industrial production, also can adopt gas generator to produce coal gas.For gas producer, its coal gas escape pipe, in port 14 stretches into kiln body 1, produces flame to coordinate with ignition part 2 by burning coal gas.
In order further to reduce dust pollution; protection of the environment; cleaner 7 can be set; this cleaner can comprise dust excluding hood 71 and air blast 72; wherein, dust excluding hood 71 is arranged on kiln body 1 top, and the area of dust excluding hood 71 is larger; when material loading and calcining, the dust of kiln body 1 interior generation can be adsorbed on dust excluding hood 71, avoids being arbitrarily scattered in surrounding environment.Adopt the air blast 72 of relatively high power air-breathing towards dust excluding hood 71, the dust of absorption on dust excluding hood 71 can be sucked in special collecting device, to focus on again.
Technique scheme is by adopting the flame image in image monitoring equipment Real-time Collection calcination area, and carry out the analysis of flame status, when without flame status, by controller, controlling ignition part lights a fire, rekindle coal gas, can monitor the calcined state in calcining kiln, avoid because the interior dust of kiln body 1 causes more greatly fray-out of flame, but technical staff can not know the extinct event of flame in time, can improve the calcination product quality of calcining kiln.If flame extinguishes, but the unclosed valve of gas piping closes, dangerous property, and the technical scheme of the present embodiment has also improved production security to a certain extent.And adopt automatic charging parts and automatic discharge parts, can realize the automated production of calcination process, can enhance productivity.
The calcining kiln system that the utility model embodiment provides, substituted traditional manually-operated calcining mode of production, can realize automation production control, and the state of temperature in can Real-Time Monitoring calcination process, to control calcining heat, improve the quality of products, can also to its state, carry out processing in real time and differentiating to gather the mode of flame image, can control in time ignition part and again light a fire when fray-out of flame, improve the security of producing.
Finally it should be noted that: each embodiment, only in order to the technical solution of the utility model to be described, is not intended to limit above; Although the utility model is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (10)
1. a calcining kiln system, is characterized in that, comprising: kiln body, ignition part, detection part and controller;
Described kiln body comprises feeding port, discharge gate, IMAQ mouth and port; Described feeding port is arranged on the top of described kiln body, and described discharge gate is arranged on the bottom of described kiln body; The quantity of described port is at least one, and described in each, port is arranged on calcination area, along the excircle of described kiln body, arranges; The quantity of described IMAQ mouth is at least one, and described in each, described in IMAQ opening's edge, the excircle of kiln body is arranged;
Described detection part comprises image monitoring equipment, and described image monitoring equipment is arranged on described IMAQ mouth, for gathering flame image by described IMAQ mouth, and sends flame status information according to described flame image;
Described controller and described image monitoring equipment connection, for receiving described flame status information, and control described ignition part igniting according to described flame status information; Described ignition part is arranged on described port.
2. calcining kiln system according to claim 1, is characterized in that, described image monitoring equipment comprises image capture device and processor;
Camera lens in described image capture device is inner towards described kiln body, for obtaining flame image data, and by the data conversion equipment in described image capture device, described flame image data is carried out to data transaction;
Described processor is connected with the output of described data conversion equipment, for the flame image data after conversion are carried out to state analysis, and generates described flame status information.
3. calcining kiln system according to claim 2, is characterized in that, described detection part also comprises: upper level sensor and lower level sensor;
Described upper level sensor is arranged on described feeding port place, is fixed on described kiln body inwall, for detection of raw material position; Described lower level sensor is arranged on the below setting position of the described upper level sensor of distance;
Described controller is also connected with lower level sensor with described upper level sensor respectively, for according to described raw material Position Control material loading and discharge.
4. calcining kiln system according to claim 3, is characterized in that, also comprises: automatic charging parts;
Described automatic charging parts comprise and hold the hopper of calcining raw materials and for described hopper being sent to the conveyer of described kiln body under the control of described controller.
5. calcining kiln system according to claim 4, is characterized in that, described automatic charging parts also comprise electronic weighbridge;
The signal output part of described electronic weighbridge is connected with the signal input part of described controller, the weight information of the raw material holding in hopper for weighing, and described weight information is sent to described controller.
6. calcining kiln system according to claim 5, is characterized in that, described automatic charging parts are involving vibrations sieve also, and the material outlet of described vibratory sieve is arranged on described hopper top; The control signal input of described vibratory sieve is connected with the signal output part of described controller.
7. calcining kiln system according to claim 6, is characterized in that, also comprises: automatic discharge parts;
Described automatic discharge parts are arranged on described discharge gate below; The control signal input of described automatic discharge parts is connected with the signal output part of described controller.
8. calcining kiln system according to claim 6, is characterized in that, also comprises: gas generator;
Described gas generator is for generation of coal gas, and the coal gas escape pipe of described gas generator, in described port stretches into described kiln body, produces flame to coordinate with described ignition part by burning coal gas.
9. calcining kiln system according to claim 6, is characterized in that, also comprises: cleaner;
Described cleaner comprises dust excluding hood and air blast;
Described dust excluding hood is arranged on described kiln body top, and described air blast is air-breathing towards described dust excluding hood.
10. according to the calcining kiln system described in claim 1-9 any one, it is characterized in that,
Described processor is data processing device DSP;
Described upper level sensor and lower level sensor are ultrasonic sensor.
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| CN201320597588.4U CN203479034U (en) | 2013-09-26 | 2013-09-26 | Calcining kiln system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103499219A (en) * | 2013-09-26 | 2014-01-08 | 栗琳 | Calcining kiln system |
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