CN116553839A - Automatic control method applied to lime discharging of lime kiln - Google Patents
Automatic control method applied to lime discharging of lime kiln Download PDFInfo
- Publication number
- CN116553839A CN116553839A CN202310207960.4A CN202310207960A CN116553839A CN 116553839 A CN116553839 A CN 116553839A CN 202310207960 A CN202310207960 A CN 202310207960A CN 116553839 A CN116553839 A CN 116553839A
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- CN
- China
- Prior art keywords
- lime
- control system
- plc control
- ash
- weighing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 62
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 62
- 239000004571 lime Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000007599 discharging Methods 0.000 title claims abstract description 19
- 238000005303 weighing Methods 0.000 claims abstract description 42
- 238000004886 process control Methods 0.000 claims abstract description 3
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000001354 calcination Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 10
- 235000019738 Limestone Nutrition 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to the technical field of lime kiln lime calcination, and particularly discloses a method applied to automatic control of lime kiln lime discharging, wherein an electric circuit is designed to realize automatic control of weighing data acquisition and door opening and closing control of a lime bin through a PLC control system; the PLC control system analyzes and processes the ash unloading weight information according to the weighing data and automatically performs ash unloading process control; collecting the accumulated ash weight in the ash bin by adopting a weighing sensor, and connecting a weighing signal of the weighing sensor to an analog quantity module of a PLC control system, wherein the weighing sensor provides a lime weighing signal for the PLC control system; a timer T100 is arranged in the PLC control system, and the opening and closing of the ash bin gate are automatically controlled at fixed time; according to the invention, real lime weight data is obtained after the operation of the PLC control system, so that the operation condition of lime production is truly reflected, and the production operation and decision making are facilitated; the intrinsically safe operation of the device is realized.
Description
Technical Field
The invention relates to the technical field of lime kiln lime calcination, in particular to an automatic control method applied to lime kiln lime discharging.
Background
At present, the large lime kiln consists of a feeding system, a calcining system, a discharging system, a belt conveying system, a dust removing system and the like, and each system automatically operates under the control of a PLC system according to the process requirements to finish large-scale industrial production. However, the ash discharging system has the defects in design, selection and the like, when limestone in the lime kiln is calcined into lime in the kiln body, the lime is quantitatively discharged each time according to the process requirement, the discharged lime is conveyed to a finished product position through a conveying belt, the lime kiln is added with the limestone at regular time through a feeding system, and then quantitative finished product lime is discharged at fixed time intervals, so that the whole kiln body orderly operates according to the process requirement. The existing lime kiln ash discharging system consists of a weighing sensor, a weighing controller and an ash bucket door opening control part. At present, the problems that the data of the weighing controller is distorted, the ash discharge weight of each time has larger error, the uploading network data is not in agreement with the actual severity (the accumulated number of each ash discharge hole is about 4 tons in each day), the weighing controller is halted and controlled to be out of order sometimes, and the production and data acquisition are seriously affected. Therefore, it is necessary to design a method for automatically controlling lime discharging of a lime kiln to prevent data distortion and control failure according to the defects in the prior art.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide an automatic control method applied to lime discharging of a lime kiln.
The technical scheme adopted for solving the technical problems is as follows: a method for automatically controlling lime discharge of lime kiln, comprising the following steps:
1) An electrical circuit is designed, so that weighing data acquisition and door opening and closing control of the ash bin are automatically controlled through a PLC control system;
2) The PLC control system analyzes and processes the ash unloading weight information according to the weighing data and automatically performs ash unloading process control;
3) Collecting the accumulated ash weight in the ash bin by adopting a weighing sensor, and connecting a weighing signal of the weighing sensor to an analog quantity module of a PLC control system, wherein the weighing sensor provides a lime weighing signal for the PLC control system;
4) A timer T100 is arranged in the PLC control system, and the opening and closing of the ash bin gate are automatically controlled at fixed time.
Specifically, in the electrical circuit in the step 1), the switch KA1 is set to be powered on to control the ash bin to open the door, the switch KA2 is set to be powered on to control the ash bin to close the door, the SQ1 is feedback of opening the door in place, and the SQ2 is feedback of closing the door in place;
the weighing sensor feeds back to the PLC control system through the acquisition circuit, the weight of lime in the lime bin is obtained through calculation of the PLC control system, when the weight of lime reaches 10kg, the PLC control system sets a door opening position, the switch KA1 is powered on to discharge the lime, the switch KA1 is reset after time delay is 5 seconds, the switch KA2 is set, and the bin door is closed to discharge the lime; and simultaneously, accumulating and uploading the ash unloading weight to an upper computer system.
Specifically, the weighing sensor in the step 3) outputs a current signal of 4-20 mA to the PLC control system, and the measuring range of the weighing sensor is 0-500 kg.
The invention has the following beneficial effects:
the automatic control method for lime discharging of the lime kiln, which is designed by the invention, is characterized in that the data collected by the weighing sensor directly enter the PLC control system, and real data of lime weight is obtained after the calculation of the PLC control system, so that the data distortion generated after the transfer by the weighing sensor is avoided, the operation condition of lime production is truly reflected, and the production operation and decision making are more facilitated; automatic control of ash discharge is realized under the control of a PLC control system, the PLC control system is stable and reliable in operation, the problem of control failure does not occur, and intrinsically safe operation of equipment is realized.
Drawings
Fig. 1 is a schematic circuit diagram of a gray bin gate switch control.
Fig. 2 is a schematic circuit diagram of a load cell in a PLC control system.
FIG. 3 is a schematic circuit diagram of the ash bin gate switch in-place determination in the PLC control system.
Fig. 4 is a schematic circuit diagram of ash bin gate switch control in a PLC control system.
Fig. 5 is a system execution diagram of weighing data processing in the PLC control system.
Fig. 6 is a system execution diagram of ash bin gate switch control in a PLC control system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described in further detail below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-6, the method applied to automatic control of lime discharge of the lime kiln is realized by the following parts:
1. and designing an electrical schematic diagram, including a ash bin switch door circuit diagram, a PLC control schematic diagram and a weighing data circuit diagram. In the figure, when the switch KA1 is powered on, the door is controlled to be opened, when the switch KA2 is powered on, the door is controlled to be closed, and the SQ1 is door opening in-place feedback and the SQ2 is door closing in-place feedback; the weighing sensor is fed back to the PLC control system through the acquisition circuit, the weight of lime is obtained through calculation of the PLC control system, when the lime reaches 10kg, the PLC control system sets a door opening position, the switch KA1 is powered on to start discharging the ash, the switch KA1 is reset after time delay is 5 seconds, the switch KA2 is set, and the bin door is closed to discharge the ash; and (5) carrying out next ash discharging after a certain time delay, and simultaneously accumulating the ash discharging weight and uploading the accumulated ash discharging weight to a network system.
2. Selecting a proper PLC control system, selecting a Siemens S7-300 series set, and for the convenience of uploading data, selecting a module with an Ethernet interface for the network, wherein the PLC control system analyzes and processes the data of the ash discharging weight information; and the ash discharging process is automatically controlled, so that the purpose of stabilizing the system operation is achieved.
3. A weighing sensor with the measuring range of 0-500 kg is selected, a current signal of 4-20 mA is correspondingly output, the signal is connected to an analog quantity module of the PLC control system, a lime weighing signal is provided for the PLC control system, and the weighing sensor is a very important part of the system and is required to resist high temperature.
4. As can be seen from the program diagrams of the PLC control system of fig. 5 to 6, the data processed by the lime weighing signal PIW418 through the FC11 program block is stored in the db1.dbd78, the data of the db1.dbd78 is processed through the two-stage comparison program, when the weight is greater than 10kg, Q1.0 is set and output, the lime bin gate is opened to discharge 10kg lime, and the timer T100 is delayed for 10 seconds, Q1.0 is reset; and meanwhile, Q1.1 is set and output, and the ash bin gate is closed.
Therefore, the automatic control of ash discharging is realized under the control of the PLC control system by the method, the problem of control failure caused by unstable weighing controller is solved because the PLC control system operates stably and reliably, meanwhile, the weighing sensor data directly enter an analog module of the PLC control system, the problem of signal distortion is solved, and the intrinsically safe operation of equipment is realized by foolproof and error-proof measures.
The present invention is not limited to the above embodiments, and any person who can learn the structural changes made under the teaching of the present invention can fall within the scope of the present invention if the present invention has the same or similar technical solutions.
The technology, shape, and construction parts of the present invention, which are not described in detail, are known in the art.
Claims (3)
1. A method for automatically controlling lime discharge of lime kiln, which is characterized by comprising the following steps:
1) An electrical circuit is designed, so that weighing data acquisition and door opening and closing control of the ash bin are automatically controlled through a PLC control system;
2) The PLC control system analyzes and processes the ash unloading weight information according to the weighing data and automatically performs ash unloading process control;
3) Collecting the accumulated ash weight in the ash bin by adopting a weighing sensor, and connecting a weighing signal of the weighing sensor to an analog quantity module of a PLC control system, wherein the weighing sensor provides a lime weighing signal for the PLC control system;
4) A timer T100 is arranged in the PLC control system, and the opening and closing of the ash bin gate are automatically controlled at fixed time.
2. The method for automatically controlling lime discharging of a lime kiln according to claim 1, wherein the electric circuit in the step 1) is provided with a switch KA1 for controlling the door opening of the lime bin when power is supplied, a switch KA2 for controlling the door closing of the lime bin when power is supplied, a switch SQ1 for opening the door in place feedback and a switch SQ2 for closing the door in place feedback;
the weighing sensor feeds back to the PLC control system through the acquisition circuit, the weight of lime in the lime bin is obtained through calculation of the PLC control system, when the weight of lime reaches 10kg, the PLC control system sets a door opening position, the switch KA1 is powered on to discharge the lime, the switch KA1 is reset after time delay is 5 seconds, the switch KA2 is set, and the bin door is closed to discharge the lime; and simultaneously, accumulating and uploading the ash unloading weight to an upper computer system.
3. The method for automatically controlling lime discharging of lime kiln according to claim 1, wherein the weighing sensor in the step 3) outputs a current signal of 4-20 mA to the PLC control system, and the measuring range of the weighing sensor is 0-500 kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310207960.4A CN116553839A (en) | 2023-03-07 | 2023-03-07 | Automatic control method applied to lime discharging of lime kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310207960.4A CN116553839A (en) | 2023-03-07 | 2023-03-07 | Automatic control method applied to lime discharging of lime kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116553839A true CN116553839A (en) | 2023-08-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310207960.4A Pending CN116553839A (en) | 2023-03-07 | 2023-03-07 | Automatic control method applied to lime discharging of lime kiln |
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| CN (1) | CN116553839A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203615760U (en) * | 2013-12-05 | 2014-05-28 | 石家庄凯润热能科技有限公司 | Lime kiln bottom discharge weighing device |
| CN208569353U (en) * | 2018-07-20 | 2019-03-01 | 鄂尔多斯市双欣化学工业有限公司 | A kind of limekiln ash discharge automatic control system based on PLC control |
| CN110835238A (en) * | 2019-10-26 | 2020-02-25 | 石家庄奋进科技有限公司 | Volume-weight type sealing ash discharging machine |
| CN211394308U (en) * | 2019-10-26 | 2020-09-01 | 石家庄奋进科技有限公司 | Volume-weight type sealing ash discharging machine |
| CN112028501A (en) * | 2020-09-14 | 2020-12-04 | 北京嘉永会通能源科技有限公司 | High-yield double-hearth lime kiln combustion automatic control system |
| CN113372026A (en) * | 2021-08-13 | 2021-09-10 | 山东万达环保科技有限公司 | Lime production line |
-
2023
- 2023-03-07 CN CN202310207960.4A patent/CN116553839A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203615760U (en) * | 2013-12-05 | 2014-05-28 | 石家庄凯润热能科技有限公司 | Lime kiln bottom discharge weighing device |
| CN208569353U (en) * | 2018-07-20 | 2019-03-01 | 鄂尔多斯市双欣化学工业有限公司 | A kind of limekiln ash discharge automatic control system based on PLC control |
| CN110835238A (en) * | 2019-10-26 | 2020-02-25 | 石家庄奋进科技有限公司 | Volume-weight type sealing ash discharging machine |
| CN211394308U (en) * | 2019-10-26 | 2020-09-01 | 石家庄奋进科技有限公司 | Volume-weight type sealing ash discharging machine |
| CN112028501A (en) * | 2020-09-14 | 2020-12-04 | 北京嘉永会通能源科技有限公司 | High-yield double-hearth lime kiln combustion automatic control system |
| CN113372026A (en) * | 2021-08-13 | 2021-09-10 | 山东万达环保科技有限公司 | Lime production line |
Non-Patent Citations (1)
| Title |
|---|
| 巨克选;王向钊;毛洪利;陈靖;: "OMRON PLC在石灰窑配料、上料控制***中的应用", 纯碱工业, no. 01, 15 January 2010 (2010-01-15) * |
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