CN211676765U - Self-adaptive control system of electrolytic aluminum purification dust remover - Google Patents
Self-adaptive control system of electrolytic aluminum purification dust remover Download PDFInfo
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- CN211676765U CN211676765U CN201922355746.5U CN201922355746U CN211676765U CN 211676765 U CN211676765 U CN 211676765U CN 201922355746 U CN201922355746 U CN 201922355746U CN 211676765 U CN211676765 U CN 211676765U
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Abstract
The utility model relates to an electrolytic aluminum purification dust remover's control technology field, concretely relates to electrolytic aluminum purification dust remover self-adaptation control system, this control system include a plurality of bag filter unit, with a plurality of bag filter unit one-to-one connect a plurality of remote control ware, with a plurality of remote control ware that remote control ware is connected and with the server that main control ware is connected, wherein, every the bag filter unit include respectively with corresponding feedback module and execution module that remote control ware is connected, feedback module including respectively with flue gas flowmeter, box differential pressure transmitter and the dust detector that remote control ware is connected, execution module include with the jetting valves that remote control ware is connected. The utility model discloses to main control unit and remote controller redundant configuration, system reliability improves greatly.
Description
Technical Field
The utility model relates to a control technical field of electrolytic aluminum purification dust remover, concretely relates to electrolytic aluminum purification dust remover self-adaptation control system.
Background
During the production of electrolytic aluminum, the aluminum electrolysis cell produces a large amount of fluorine-containing flue gas, which must be purified before being discharged into the atmosphere. The domestic electrolysis flue gas purification system basically adopts a low-pressure back-blowing bag-type dust remover or a low-pressure pulse bag-type dust remover. Fresh alumina is fed into a pneumatic chute through a feeding device, a metering device and a material distributing device and then is fed into a dust remover. The dust remover is divided into a plurality of groups of bag filter units, a densely distributed filter bag is arranged in each unit, the bottom of the filter bag is fully distributed with fresh alumina by the distributing device, and the electrolytic flue gas enters the box body to carry out adsorption reaction with the fresh alumina, so that the dust removal and fluorine removal effects are achieved. The top of the box body is provided with a pulse injection device, and a pulse nozzle of the pulse injection device is communicated in the box body and is opposite to the outlet of the filter bag. The pulse injection device can regularly clean dust attached to the filter bag and fall into a dust hopper of the dust collector for centralized treatment. The pulse blowing device of the dust removal unit is centrally controlled by a PLC, and compressed air is adopted for online dust removal.
Fresh alumina unloader adopts the governing valve, generally adopts the manual work to adjust the valve aperture according to experience, and complex operation just can't in time follow the flue gas and change and make the adjustment, and the input volume is suddenly big or suddenly little, and the material that often takes place runs out, the flow blocks up, influences production. The blowing valve set of the dust remover needs to work continuously, and once the blowing valve set stops, serious consequences can be caused, and the requirement on the reliability of the system is extremely high. In the existing dust remover control system, a PLC generally adopts a single controller, and once the controller fails or communication fails, the whole dust remover stops working.
In practice, the inventors found that the above prior art has the following disadvantages:
with the expansion of the scale of the dust remover, one dust remover is provided with 16-28 groups of unequal bag filtration units, the number of the pulse valves reaches more than 500 and 600, each pulse valve needs one PLC output point, and the whole system needs a large number of output points and control cables, so that the system scale is overlarge, and the construction and the maintenance are difficult. Under the single controller structure, the jetting mode and the jetting time of all bag filter units are set up in unison, and each bag filter unit is along with the operating mode change, and the filter bag ash collection condition is different, adopts unified control program, can not make the adjustment according to the ash collection condition of filter bag, causes the energy waste, and the filter bag life-span reduces. The working state of the bag filter unit cannot be identified according to the change of the differential pressure of the box body, and the bag filter unit cannot be further finely controlled.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims at providing an electrolytic aluminum purifies dust remover self-adaptation control system, the technical scheme who adopts specifically as follows:
the embodiment of the utility model provides an electrolytic aluminum purifies dust remover self-adaptation control system, this control system include a plurality of bags filter the unit, with a plurality of bag filter a plurality of remote control ware that the unit one-to-one is connected, with a plurality of remote control ware that remote control ware is connected and with the server that main control ware is connected, wherein, every the bag filter the unit include respectively with corresponding feedback module and execution module that remote control ware is connected, feedback module include respectively with flue gas flowmeter, box differential pressure transmitter and the dust detector that remote control ware is connected, execution module include with the jetting valves that remote control ware is connected.
Further, the remote controller comprises a PLC, and an input/output module and a communication module which are respectively connected with the PLC.
Further, the feedback module further comprises a flow switch connected with the remote controller.
Further, the server is connected with the client.
Further, the control system also comprises a dust remover feeding system device connected with the main controller.
Furthermore, the dust remover feeding system equipment comprises a fan, a temperature sensor and a fan pressure sensor, wherein the fan is respectively connected with the main controller, the temperature sensor is used for collecting the temperature of the flue gas, and the fan pressure sensor is used for collecting the outlet pressure of the fan.
Further, the main controller and the remote controller are connected through Ethernet.
Further, the flue gas flowmeter is arranged on a flue gas inlet pipe of the dust remover.
Further, the dust detector is mounted on a dust sampling tube arranged in the bag filter unit.
The utility model discloses following beneficial effect has:
the utility model discloses a main control unit and remote controller's redundant configuration not only can improve the reliability of system, can discern the operating condition of bag filter unit moreover according to the change of box differential pressure, makes the adjustment of adaptability according to the collection grey condition of its filter bag unit, reaches the control that becomes more meticulous.
Drawings
In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive work.
FIG. 1 is a block diagram of an adaptive control system for an electrolytic aluminum purification dust collector according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an execution module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a remote controller according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a feeding system of a dust remover according to an embodiment of the present invention.
In the figure: 100-bag filter unit, 200-remote controller, 300-main controller, 400-server, 500-client, 600-dust remover feeding system equipment, 101-feedback module, 102-execution module, 1011-flue gas flowmeter, 1012-box differential pressure transmitter, 1013-dust detector, 1014-flow switch, 1021-blowing valve group, 1022-blanking valve, 201-PLC, 202-input and output module, 203-communication module, 601-fan, 602-temperature sensor, 603-fan pressure sensor and 604-metering device.
Detailed Description
In order to further illustrate the technical means and effects of the present invention adopted to achieve the objects of the present invention, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, describes a self-adaptive control system for an electrolytic aluminum dust-cleaning device, the detailed implementation, structure, features and effects thereof. In the following description, different "one embodiment" or "another embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
It will be understood that when an element is referred to as being "disposed" or "connected" to another element, it can be directly on the other element or intervening elements may also be present.
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 in the description of the invention herein 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.
The specific scheme of the self-adaptive control system for the electrolytic aluminum purification dust remover provided by the utility model is described in detail with the attached drawings.
Referring to fig. 1, a schematic structural diagram of an adaptive control system for an electrolytic aluminum purification dust remover according to an embodiment of the present invention is shown. In order to enable the system to recognize the working state of the bag filter unit according to the change of the differential pressure of the box body, the adaptability adjustment is made according to the dust collection condition of the filter bag, and the fine control is achieved. The embodiment of the utility model provides a through all installing jetting control program and switching program at main control unit and remote controller, make the main control unit 300 and the redundant control that remote controller 200 can switch mutually. That is, when the main controller 300 malfunctions or the network is interrupted, the remote controller 200 triggers a switching procedure, and the remote controller 200 is automatically activated to control the corresponding bag filter unit 100. When the communication is normal and the signal is restored, the main controller 300 is switched back to control the corresponding bag filter unit 100.
Specifically, the embodiment of the utility model provides a self-adaptation control system of electrolytic aluminum purification dust remover includes a plurality of bag filter unit 100, a plurality of remote control 200, main control unit 300 and server 400, and wherein bag filter unit 100 and remote control 200 one-to-one are connected, and a plurality of remote control 200 are connected with main control unit 300 respectively, and main control unit 300 is connected with server 400. Wherein each bag filter unit 100 comprises a feedback module 101 and an execution module 102, the feedback module 101 and the execution module 102 being respectively connected to a corresponding remote controller 200. Specifically, the feedback module 101 includes a flue gas flowmeter 1011, a box differential pressure transmitter 1012, a dust detector 1013, and a flow switch 1014, which are respectively connected to the remote controller 200, and the execution module 102 includes a blowing valve set 1021 connected to the remote controller 200.
Preferably, the flue gas flow meter 1011 is mounted on the flue gas inlet pipe of the dust remover. The flow switch 1014 is arranged on the blanking pipe of the dust remover and is used for detecting the blanking flow of the alumina, and the flow switch adopts a microwave fixed flow switch.
Preferably, a dust sampling pipe is provided in each bag filter unit 100, and the dust detector 1013 is installed to the dust sampling pipe.
Referring to fig. 2, preferably, the execution module 102 further includes a blanking valve 1022 connected to the remote controller 200, the blanking valve 1022 is an electric regulating valve, and the blanking valve 1022 is used for controlling the blanking amount of the alumina.
Referring to fig. 3, an ethernet connection is preferably used between the main controller 300 and the remote controller 200. The remote controller 200 comprises a PLC201, an input/output module 202 and a communication module 203, wherein corresponding parameters sent by the feedback module 101 in the bag filter unit 100 are received by the input/output module 202, and after the PLC201 analyzes and processes the corresponding parameters, the communication module 203 communicates with the main controller 300 through an ethernet.
In normal operation, the main controller 300 sends control signals to the execution module 102 according to the parameters fed back by the feedback module 101. Specifically, the feedback module 101 sends the collected flue gas amount, the box differential pressure and the differential pressure change rate, and the feedback parameters of the dust detector 1013 to the remote controller 200, the remote controller 200 sends the feedback parameters to the main controller 300, the main controller 300 compares the feedback parameters with the characteristic values of the corresponding parameters in the server 400, and the execution module 102 is controlled to execute corresponding actions according to the comparison result.
Specifically, regarding the feature values, an expert system based on a feature library is constructed in the server 400, the feedback parameters are compared and analyzed with the feature values in the feature library, and the operation of the equipment is automatically controlled through rules.
The detected flue gas amount entering the dust remover is regulated by a system to adaptively adjust the opening of a blanking valve and control the blanking amount of fresh alumina according to a matching rule Q = k m (k is a calculation coefficient) of the flue gas amount m and the blanking amount Q.
The expert system can analyze the detection signal of each bag filter unit 100, judge the pressure field in the box body and the dust distribution morphological characteristics, and adaptively adjust the blowing frequency and the blowing time of the blowing valve set 1021 so as to realize intelligent optimal blowing mode. Specifically, feedback signals such as box differential pressure, differential pressure change rate, dust concentration and the like are respectively compared with preset values in a characteristic library, the deviation degree of the state of the analysis equipment from a normal state is calculated mainly by adopting a least square method and a mean square error algorithm, and the change trend of the system is judged. Specifically, the reasonable range of the differential pressure of the box body of the bag filter unit 100 is 800-1200Pa, and the adsorption effect of the filter bag is affected by over-high or over-low differential pressure. The trend of the positive or negative change rate of the differential pressure of the box body reflects the change trend of the system to a better or worse state. If the box differential pressure of the bag filtering unit 100 reaches the preset highest threshold value, it indicates that the dust in the box of the bag filtering unit 100 is too much, and the system automatically increases the blowing time and the blowing frequency of the bag filtering unit 100. On the contrary, if the differential pressure of the box body of the bag filtration unit 100 is low, the system automatically reduces the injection time and the injection frequency of the unit until the differential pressure slowly returns to a reasonable interval.
The system automatically adjusts parameters and gives an alarm: when the feedback differential pressure value of a certain box body deviates from a reasonable range, such as 0-10%, the program automatically increases and decreases the blowing time and the blowing frequency, and the specific numerical value is determined according to the actual production; when the fed back differential pressure value of a certain box body deviates from a reasonable range, for example, deviates from 20%, the program automatically adjusts parameters and simultaneously sends alarm information to the upper computer, so that the bag filter units 100 are adaptively and intelligently controlled according to working conditions, and the differential pressure of the box body of the bag filter units 100 is maintained in a reasonable interval. The expert system calculates and analyzes the deviation degree of the dust concentration signal and the normal state, sends alarm information to the upper computer when the deviation degree exceeds a preset maximum value, can more accurately detect and judge the cylinder fault and the filter bag leakage fault, and timely collects and informs the abnormal alarm to the maintainers. Specifically, if the dust concentration of the box body of the bag filtering unit 100 reaches a preset highest threshold value, it is indicated that the filter bag in the bag filtering unit 100 is damaged and leaks, and the system sends an alarm information prompt. When a certain pulse valve is used for blowing, the fluctuation change rate of the dust concentration exceeds a preset highest threshold value, the possibility that a filter bag corresponding to the pulse valve is damaged and leaks is high, if the phenomenon repeatedly occurs, alarm information is sent, the position of a leaking cloth bag is located, and an operator is prompted to overhaul.
Specifically, in the present embodiment, all the remote controllers 200 transmit the collected feedback data to the main controller 300 through the core switch and the ethernet network, and the server 400 connected to the main controller 300 stores and analyzes the data. Specifically, the server 400 is provided with the latest version of rocxwell upper computer management software for a manager to perform operation process analysis, energy consumption analysis and calling of a historical curve and a historical report, and the client 500 connected with the server 400 is operated to allow a dispatcher to observe real-time data in the system and perform remote operation, so that the purpose of centralized management is achieved. For example, a worker may remotely operate one or more of the baghouse 100, the fan 601, the blanking valve, etc. of the duster feed system apparatus 600 via an upper computer. A control mode of a blowing valve set 1021 can be set on the upper computer, and the control mode comprises three control modes of manual control, timing control and intelligent control. Parameters such as the blowing frequency, the blowing time interval, and the blowing cycle interval of the blowing valve block 1021 can be set on the operation interface. In the intelligent mode, the program compares the current signal with the feature library, calculates and analyzes the deviation degree of the equipment state and the normal state, judges the system change trend, automatically adjusts the parameters and gives an alarm to realize intelligent control. When the main controller 300 fails or the network is interrupted, the remote station PLC201 program is automatically started to control the pulse valve to blow. When the communication is recovered to normal, the remote station PLC201 recovers the standby state and switches back to the control of the master control station PLC 201.
In summary, the main controller 300 and the remote controller 200 are configured redundantly, and the system reliability is greatly improved. The whole system adopts Ethernet communication, is convenient and easy to use, saves cables, has high automatic control and saves labor cost. Automatically adjusting the blanking amount of fresh alumina according to the change of the smoke amount; the blowing time and the blowing frequency of each unit pulse valve are automatically adjusted, so that the control is more accurate, and the energy is saved; the real-time monitoring of the differential pressure state, the cutoff fault, the cylinder fault and the filter bag leakage fault of the bag filtration unit 100 is realized, and the blocking leakage is found in time; the device has the function of over-limit alarm linked shutdown of important parts such as pressure, temperature, blanking device and the like.
Specifically, in the present embodiment, the remote controller 200 employs a PLC201, specifically, a rockvier 1766 controller. The main controller 300 may use the same type of PLC201 as the remote controller 200, or may use a different type of PLC 201.
Referring to fig. 4, in other embodiments, the control system further includes a dust collector feeding system 600 connected to the main controller 300, and the signals of the dust collector feeding system 600 include a fan control signal, a flue gas temperature, a fan outlet pressure, a total amount of alumina powder, and the like. The main controller 300 is connected to the server 400 through the ethernet. The fan control signal is a control signal for controlling the fan 601 by the main controller 300, the flue gas temperature can be acquired by the temperature sensor 602, the fan outlet pressure can be acquired by the fan pressure sensor 603, the total amount of alumina powder can be weighed by the metering device 604, and the metering device can adopt a sensor or a belt scale for weighing.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (9)
1. The utility model provides an electrolytic aluminum purifies dust remover adaptive control system, this control system includes a plurality of bag filter unit, its characterized in that, with a plurality of bag filter unit one-to-one connect a plurality of remote control ware, with a plurality of a main control unit that remote control ware is connected and with the server that main control unit connects, wherein, every the bag filter unit include respectively with corresponding feedback module and execution module that remote control ware is connected, feedback module including respectively with flue gas flowmeter, box differential pressure transmitter and the dust detector that remote control ware is connected, execution module include with the jetting valves that remote control ware is connected.
2. The adaptive control system for the electrolytic aluminum purification dust remover according to claim 1, wherein the remote controller comprises a PLC, and an input/output module and a communication module respectively connected with the PLC.
3. The adaptive control system for the electrolytic aluminum purification dust remover according to claim 1 or 2, wherein the feedback module further comprises a flow switch connected with the remote controller.
4. The adaptive control system for the electrolytic aluminum purification dust remover according to claim 3, wherein the server is connected with the client.
5. The adaptive control system for an electrolytic aluminum purification dust remover according to claim 3, further comprising a dust remover feeding system device connected to said main controller.
6. The adaptive control system of the electrolytic aluminum purification dust remover according to claim 5, wherein the dust remover feeding system device comprises a fan, a temperature sensor for collecting flue gas temperature and a fan pressure sensor for collecting fan outlet pressure, which are respectively connected with the main controller.
7. The adaptive control system for the electrolytic aluminum purification dust remover according to claim 1 or 2, wherein the main controller and the remote controller are connected by Ethernet.
8. The adaptive control system for the electrolytic aluminum purification dust remover according to claim 1 or 2, wherein the flue gas flow meter is installed on a flue gas inlet pipe.
9. The adaptive control system for an electrolytic aluminum cleaning dust collector according to claim 1 or 2, wherein the dust detector is mounted on a dust sampling pipe provided in the bag filter unit.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114875453A (en) * | 2022-06-10 | 2022-08-09 | 滨州北海汇宏新材料有限公司 | Intelligent emergency blowing control system of aluminum electrolysis dust remover |
| CN116613657A (en) * | 2023-07-19 | 2023-08-18 | 广东电网有限责任公司佛山供电局 | Self-cleaning substation reactor room environment treatment system and method |
-
2019
- 2019-12-25 CN CN201922355746.5U patent/CN211676765U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114875453A (en) * | 2022-06-10 | 2022-08-09 | 滨州北海汇宏新材料有限公司 | Intelligent emergency blowing control system of aluminum electrolysis dust remover |
| CN116613657A (en) * | 2023-07-19 | 2023-08-18 | 广东电网有限责任公司佛山供电局 | Self-cleaning substation reactor room environment treatment system and method |
| CN116613657B (en) * | 2023-07-19 | 2024-01-23 | 广东电网有限责任公司佛山供电局 | Self-cleaning substation reactor room environment treatment system and method |
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