CN110615496A - Full-automatic control system and control method of wastewater drying system - Google Patents
Full-automatic control system and control method of wastewater drying system Download PDFInfo
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- CN110615496A CN110615496A CN201910899004.0A CN201910899004A CN110615496A CN 110615496 A CN110615496 A CN 110615496A CN 201910899004 A CN201910899004 A CN 201910899004A CN 110615496 A CN110615496 A CN 110615496A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
- C02F1/12—Spray evaporation
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- 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
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- 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
- G05B2219/00—Program-control systems
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Abstract
The invention discloses a full-automatic control system and a control method of a wastewater drying system, wherein the automatic control system comprises a main control module, a data processing module, a subsystem control module, an alarm module, a state monitoring module and an automatic cleaning module, the full-automatic control of the wastewater drying system is realized through the mutual connection of the modules, the operation of the system is comprehensively monitored and controlled, the automatic operation of the system is realized through the control method, and the stability of the system is ensured; the automatic switching and automatic operation of the operation mode are realized through a preset starting mode, a preheating mode, a dry grinding mode, a water spraying mode, a slurry spraying mode and a stopping mode according to the operation condition of the system. The invention realizes the full-automatic control of the wastewater drying system, realizes the accurate control of each parameter, can automatically perform system diagnosis and switch the system operation mode, improves the stability of the system operation and reduces the participation of operators.
Description
Technical Field
The invention relates to the technical field of wet desulphurization, in particular to a full-automatic control system and a control method of a wastewater drying system.
Background
In the desulfurization wastewater zero-discharge system, the drying process of the wastewater drying system is a result of mutual influence of various parameters, the control process and the method are not completely mature, the control process mainly depends on manual regulation and exploration, the wastewater drying system has higher requirement on the control precision of the operation parameters, if the bed temperature of the drying bed directly influences the stable operation of the drying bed system, the safe and stable operation of electric dust removal at the rear end is influenced by overhigh temperature of the drying bed, and the condition that the operation working condition of the drying bed is deteriorated and even the bed collapses is easily caused by overlow temperature;
the wastewater drying system needs to switch the operation modes for many times in the operation process, the control mode of the conventional wastewater drying system adopts manual operation to complete the switching of the operation modes, the abnormal operation condition of the drying bed can only be monitored by strengthening, the full-automatic control of the operation process cannot be realized, and great obstacles are caused to the safe and stable operation of the wastewater drying system. A set of excellent full-automatic control system is established to effectively and automatically control the operation process of the wastewater drying system, and the system has important significance for improving the safety and the economy of the wastewater drying system and reducing the labor intensity of operators. The invention provides a full-automatic control system and a control method of a wastewater drying system, which realize full-automatic control of the wastewater drying system, solve the problems and ensure the safety and stability of the system operation.
Disclosure of Invention
The invention provides a full-automatic control system and a control method of a wastewater drying system, which realize automatic switching of operation modes without intervention of operators, realize accurate control of operation parameters and ensure safe and stable operation of a wastewater treatment system.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a full-automatic control system of a wastewater drying system comprises a mode main control module, a control module and a control module, wherein the mode main control module is internally provided with an operation mode and is used for setting operation mode parameters, starting and stopping the system and switching the operation mode; the mode main control module is in signal connection with the data processing module and the sub-control module, outputs a start-stop instruction and operation mode parameter data to the processing module, and outputs the start-stop instruction to the sub-control module;
the data processing module is in signal connection with the sub-control module, the alarm module, the state monitoring module and the automatic cleaning module, receives operation mode parameter data of the mode main control module and real-time state data of the state monitoring module, sets control parameter data according to the operation mode parameters, outputs the control parameter data to the sub-control module, outputs an operation mode switching instruction to the mode main control module according to the real-time state data, and outputs the control data to the alarm module and the automatic cleaning module;
the sub-control module is in signal connection with the air volume control module, the bed temperature control module and the slurry supply control module, receives start-stop instructions of the mode main control module and control parameter data of the data processing module, and outputs control data to the air volume control module, the bed temperature control module and the slurry supply control module;
the alarm module receives the control data of the data processing module and gives an alarm when the system is abnormal;
the state monitoring module is used for monitoring the running state of the system and outputting real-time state data to the data processing module;
and the automatic cleaning module receives the control data of the data processing module and is used for starting and stopping the automatic cleaning function and setting a timing cleaning period.
Furthermore, the air volume control module, the bed temperature control module and the slurry supply control module are used for controlling the running state of the execution device; the executing devices are respectively a hot air blower, an air cooler and a slurry supply regulating valve.
Further, the control parameter data output by the data processing module comprises an execution device running state and a system target value; the operation states of the executing device are respectively the operation frequency of the hot air blower, the operation frequency of the cold air blower and the opening degree of the slurry supply regulating valve, and the target values of the system states comprise target values of total air volume, bed temperature and slurry supply amount.
Further, the operation modes comprise a starting mode, a preheating mode, a dry grinding mode, a water spraying mode, a slurry spraying mode and a stopping mode.
Furthermore, in the starting mode, the state monitoring module checks the running state of the system and the running state of the execution device, and the sub-control module receives a starting instruction of the mode main control module and control parameter data of the data processing module to control the execution device to run so as to achieve a precondition required by the preheating mode;
in the preheating mode, the data processing module outputs control parameter data to the sub-control module, controls the running states of the hot air blower and the cold air blower, sets a total air volume and a bed temperature target value, and transitions the system state from a cold state to a hot state in 2-5 stages to achieve the precondition required by the dry grinding mode;
in the dry grinding mode, the data processing module outputs control data parameters to the sub-control module, the running states of the hot air blower and the cold air blower are controlled, the total air volume and the bed temperature target value are set, and the wastewater drying system is in an air blowing cleaning state;
in the water spraying mode, the system inputs process water, the data processing module outputs control parameter data to the sub-control module, the running states of the hot air blower, the cold air blower and the slurry supply regulating valve are controlled, the target values of the total air volume, the bed temperature and the slurry supply volume are set, and the wastewater drying system is in a clean state of the process water;
in the slurry spraying mode, the system inputs wastewater, the data processing module outputs control parameter data to the sub-control module, the running states of the hot air blower, the cold air blower and the slurry supply regulating valve are controlled, the target values of the total air volume, the bed temperature and the slurry supply volume are set, and the wastewater drying system is in a loaded working state;
in the shutdown mode, the sub-control module controls the running states of the hot air blower, the cold air blower and the slurry supply regulating valve and sets target values of total air volume, bed temperature and slurry supply amount, and the system state is transited from a hot state to a cold state in 2-5 stages.
Further, the shutdown modes include a normal shutdown and a failed shutdown; when the system is normally shut down, the mode main control module outputs a shutdown instruction to the sub-control module to shut down in stages, and the system state is transited from a hot state to a cold state; when the system is in fault shutdown, the state monitoring module outputs real-time state data to the data processing module, the data processing module outputs control parameter data to the sub-control module to shut down in stages, and the system state is transited from a hot state to a cold state.
Furthermore, the fault shutdown is divided into a guniting mode and a non-guniting mode, when the machine is shut down in the guniting mode, the water spraying mode and the dry grinding mode are called, and the system state is transferred from a hot state to a cold state; and in the non-guniting mode, stopping the machine in stages, and transitioning the system state from a hot state to a cold state.
Further, the automatic cleaning function comprises timing cleaning and fault cleaning, and the modes of slurry spraying, water spraying and dry grinding are automatically switched; and when the timing cleaning is carried out, the timing cleaning period is 1-100 h.
A control method of a full-automatic control system of a wastewater drying system comprises the following steps:
s1, starting self-checking: the system is started, an alarm module and a state monitoring module are automatically started, the initial state of each module is checked, and the state of an execution device is adjusted;
s2, start mode enters preheat mode: setting an execution device running state and a system state target value through a data processing module, and entering a preheating mode in stages;
s3, entering a dry grinding mode in a preheating mode: after the preheating mode is reached, setting the running state of the execution device and a system state target value through the data processing module, so that the wastewater drying system is in a dry grinding mode;
s4, the dry grinding mode enters a water spraying mode: after the dry grinding mode is achieved, the automatic cleaning module controls water spraying; setting the running state of the execution device and a system state target value through a data processing module, so that the wastewater drying system is in a water spraying mode;
s5, enabling the water spraying mode to enter a slurry spraying mode: the wastewater drying system inputs wastewater, sets the running state of the execution device and a system state target value through the data processing module, and performs wastewater drying treatment;
the slurry spraying mode comprises normal operation and fault operation, and in the normal operation, the regular cleaning is carried out according to the regular cleaning interval, and the dry grinding, water spraying and slurry spraying modes are switched; in the fault operation, the slurry spraying mode is switched into a water spraying and dry grinding mode, and an alarm module is controlled to give an alarm;
s6, shutdown mode: when normal work is finished or fault shutdown is carried out, the system enters a shutdown mode, the running state of the execution device and the target value of the system state are set through the data processing module, and shutdown is carried out in stages.
Further, in steps S2-S7, the data processing module is specifically configured to set the target value of the system state and the operating state of the actuator by setting the target value of the system state and the limiting value of the amplitude of the controlled variable by the data processing module, compare the target value of the system state with the actual value, process the result by the PID regulator, and output the result, and adjust the operating state of the actuator according to the limiting value of the amplitude of the controlled variable, from the actual value to the target value of the system state.
The invention has the following beneficial effects:
the full-automatic control wastewater drying system comprehensively monitors and controls the operation of the system, realizes the self-starting and automatic maintenance operation of the system, ensures the stability of the system, reduces the allocation of operating personnel and reduces the labor intensity;
the system operation is monitored in the whole process through the state monitoring module, the normal operation of the system is ensured, abnormal state data is output when a fault occurs, and the alarm module gives an alarm, so that the normal operation of the system and the safety of equipment are ensured;
the sub-control module is controlled through the data processing module, so that the operation of the execution device is controlled, the accurate control of the system operation parameters is realized, and the energy conservation and consumption reduction are realized;
different and continuous operation modes are set, automatic control and automatic switching of the system are realized, the stability of system operation is ensured, and production is guaranteed;
the invention can realize self-diagnosis of operation condition, automatic switching of operation mode, automatic parameter adjustment, and automatic control and stable operation of the system.
Drawings
FIG. 1 is a flow chart of a control system of the present invention;
FIG. 2 is a flow chart of the mode of operation of the present invention;
FIG. 3 is a schematic diagram of a control process of the execution device of the present invention.
Reference numerals: the system comprises a 1-mode main control module, a 2-data processing module, a 3-sub control module, a 31-air volume control module, a 32-bed temperature control module, a 33-slurry supply control module, a 4-alarm module, a 5-state monitoring module and a 6-automatic cleaning module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the specification, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
As shown in fig. 1, a full-automatic control system of a wastewater drying system includes a mode main control module 1, in which an operation mode is set for setting operation mode parameters, starting and stopping a system, and switching the operation mode; the mode main control module 1 is in signal connection with the data processing module 2 and the sub-control module 3, outputs start-stop instructions and operation mode parameter data to the processing module 2, and outputs the start-stop instructions to the sub-control module 3;
the data processing module 2 is in signal connection with the sub-control module 3, the alarm module 4, the state monitoring module 5 and the automatic cleaning module 6, receives operation mode parameter data of the mode main control module 1 and real-time state data of the state monitoring module 5, sets control parameter data according to the operation mode parameters, outputs the control parameter data to the sub-control module 3, outputs an operation mode switching instruction to the mode main control module 1 according to the real-time state data, and outputs the control data to the alarm module 4 and the automatic cleaning module 6;
the sub-control module 3 is in signal connection with the air volume control module 31, the bed temperature control module 32 and the slurry supply control module 33, receives start-stop instructions of the mode main control module 1 and control parameter data of the data processing module 2, and outputs control data to the air volume control module 31, the bed temperature control module 32 and the slurry supply control module 33;
the alarm module 4 receives the control data of the data processing module 2 and alarms when the system is abnormal;
the state monitoring module 5 is used for monitoring the running state of the system and outputting real-time state data to the data processing module 2;
and the automatic cleaning module 6 receives the control data of the data processing module 2 and is used for starting and stopping the automatic cleaning function and setting a timing cleaning period.
According to the invention, the operation mode is built in the mode main control module 1, the system operates according to the operation mode, the data processing module 2 receives the real-time state data of the state monitoring module 5 and compares the real-time state data with the operation mode parameter data preset in the mode main control module 1, and when the real-time data is consistent with the preset data, an instruction is transmitted to the mode main control module 1 to automatically switch the operation mode, so that the full-automatic control of the operation program of the wastewater drying system is realized.
The mode main control module 1 plays a role in presetting an operation mode and parameter data of each operation mode and realizing manual or timed starting and stopping of programs. The mode main control module 1 outputs control data to the sub-control module 3 to start the execution device when the system is started, and outputs control parameter data to the sub-control module 3 through the data processing module 2 to realize the control of the execution device when the operation mode is switched or the system is stopped, so as to further adjust the real-time state data of the system.
As shown in fig. 1, further, the air volume control module 31, the bed temperature control module 32 and the slurry supply control module 33 are used for controlling the operation state of the actuator; the executing devices are respectively a hot air blower, an air cooler and a slurry supply regulating valve.
Further, the control parameter data output by the data processing module 2 comprises an execution device running state and a system target value; the running states of the executing device are respectively the running frequency of the hot air blower, the running frequency of the cold air blower and the opening degree of the slurry supply regulating valve, and the target values of the system states comprise the target values of the total air quantity, the bed temperature and the slurry supply quantity
Further, as shown in fig. 2, the operation modes include a start-up mode, a preheating mode, a dry grinding mode, a water spraying mode, a guniting mode and a stop mode. Each operation mode is output to the data processing module 2 for analysis and processing under the monitoring of the state monitoring module 5, and whether the system is normally operated and whether the data is in a normal interval is judged. During the operation of the system, the manual normal shutdown can be performed in any operation mode.
As shown in fig. 1 and 3, further, in the start mode, the state monitoring module 5 checks the operating state of the system and the state of the execution device, and the sub-control module 3 receives a start instruction input by the mode main control module 1, and controls the execution device to operate, so as to achieve a precondition required by the preheating mode;
in the preheating mode, the data processing module 2 outputs control parameter data to the sub-control module 3, controls the running states of the hot air blower and the cold air blower, sets the target value of the total air volume and the bed temperature, and transitions the system state from a cold state to a hot state in 2-5 stages to achieve the precondition required by the dry grinding mode;
in the dry grinding mode, the data processing module 2 outputs control parameter data to the sub-control module 3, the running states of the hot air blower and the cold air blower are controlled, the total air volume and the bed temperature target value are set, and the wastewater drying system is in a blowing cleaning state;
in the water spraying mode, the system inputs process water, the data processing module 2 outputs control parameter data to the sub-control module 3, the running states of the hot air blower, the cold air blower and the slurry supply regulating valve are controlled, the target values of the total air volume, the bed temperature and the slurry supply volume are set, and the system is in a clean state of the process water;
in the slurry spraying mode, the system inputs wastewater, the data processing module 2 outputs control parameter data to the sub-control module 3, the running states of the hot air blower, the cold air blower and the slurry supply regulating valve are controlled, the target values of the total air volume, the bed temperature and the slurry supply volume are set, and the wastewater drying system is in a loaded working state;
in the shutdown mode, the sub-control module 3 controls the running states of the hot air blower, the cold air blower and the slurry supply regulating valve and sets target values of total air volume, bed temperature and slurry supply amount, and the system state is transited from a hot state to a cold state in 2-5 stages.
When the system runs, the system is divided into a normal state and a fault state.
The normal state is sequentially carried out according to the sequence of starting, preheating, dry grinding, water spraying, slurry spraying and stopping or directly enters a stopping state through manual stopping in a certain mode; and the cleaning machine is cleaned at regular time when in a guniting mode, and is switched among a dry grinding mode, a water spraying mode and a guniting mode. In order to ensure the operation of an optimized system, the water spraying cleaning mode is placed between the dry grinding and the slurry spraying, and after the water spraying cleaning is carried out, the process water in the pipeline is switched into the wastewater;
and in the fault state, the system is divided into fault operation and fault shutdown according to the system operation requirement. When the fault operation is in fault, the operation is degraded, if the fault operation is in a guniting mode, the operation is divided into fault operation according to requirements, the guniting mode is degraded into a water spraying or dry grinding mode to continue to operate, and after the system is recovered to be normal, the operation is continuously switched to the guniting mode to operate. The fault shutdown is the shutdown when a fault occurs and is divided into the fault shutdown in a guniting mode and the fault shutdown in a non-guniting mode. And (4) stopping the machine in a guniting mode, switching the guniting mode into a dry grinding and water spraying mode, and stopping the machine after cleaning the equipment. And (4) stopping the machine in a non-guniting mode in a fault mode, and directly entering a stopping mode without switching a dry grinding mode and a water spraying mode.
Further, the shutdown modes include a normal shutdown and a failed shutdown; when the system is normally shut down, the main control module 1 outputs a shutdown instruction or the data processing module 2 outputs control parameter data to the sub-control module 3 to shut down in stages in different operation modes, and the system state is transited from a hot state to a cold state; when the system is in fault shutdown, the state monitoring module 5 outputs state parameter data to the data processing module 2, the data processing module 2 outputs control parameter data to the sub-control module 3 to shut down in stages, and the system state is transited from a hot state to a cold state.
Further, when the fault shutdown is carried out, the fault shutdown is carried out under two conditions of a guniting mode and a non-guniting mode.
When the machine is stopped in a failure mode in a guniting mode, firstly, a water spraying mode and a dry grinding mode are sequentially called, and then, the system state is transited from a hot state to a cold state in stages; and under the non-guniting mode, according to a normal shutdown mode, the system state is transited from a hot state to a cold state in stages.
Further, the automatic cleaning function comprises timing cleaning and fault cleaning, automatic switching is carried out among a slurry spraying mode, a water spraying mode and a dry grinding mode, and during timing cleaning, a timing cleaning period is selected from 1-100h according to actual conditions. The regular cleaning is the normal working process of the system in the guniting mode, and the mode is switched regularly according to the set time interval, so that the equipment is cleaned and maintained. And fault cleaning, namely when a fault occurs in a guniting mode, the system is switched to a water spraying mode to automatically clean, clean equipment, protect the equipment and facilitate overhaul of personnel. The dry grinding mode and the water spraying mode are both in an automatic cleaning state and are used for cleaning different equipment in the system.
In the first embodiment of the invention, the target value of the total air volume V1, the target value of the bed temperature V2 and the target value of the pulp supply volume V3 in the running state are set, then the set actual value of the total air volume P1= V1 + -200 Nm3/h, the actual value of the bed temperature P2= V2 + -2 ℃, and the actual value of the pulp supply volume P3= V3 + -0.02 m3/h all belong to the normal state, and meet the requirement that the actual value and the target value are the same.
As shown in fig. 1 and 3, a control method of a fully automatic control system of a wastewater drying system comprises the following steps:
s1, starting self-checking: a manual or automatic starting system, an automatic starting alarm module 4 and a state monitoring module 5, checking the initial state of each module, and adjusting the state of an execution device;
s2, start mode enters preheat mode: the running state of the execution device and the target value of the system state are set through the data processing module 2, and the preheating mode is entered in stages; in the embodiment, the preheating mode is set to 2 stages, the first stage is V1=4000Nm3/h and V2=60 ℃, the temperature change amplitude P1=10 ℃/min is set, after the first stage is reached, the second stage is V1=6000Nm3/h and V2=100 ℃, the temperature change amplitude F1=15 ℃/min, and the system state is transited from the cold state to the hot state in 2 stages;
s3, entering a dry grinding mode in a preheating mode: after the preheating mode is reached, the running state of the execution device and the target value of the system state are set through the data processing module 2, so that the wastewater drying system is in a dry grinding mode; the preheating mode is transited to a dry grinding mode, V1=8000Nm3/h and V2=120 ℃ in the dry grinding mode, under the dry grinding mode, the execution device is controlled to smoothly and stably reach a system state target value, and the lowest total air volume V1 > 6000Nm3/h is guaranteed;
s4, the dry grinding mode enters a water spraying mode: after the dry grinding mode is achieved, the automatic cleaning module 6 controls water spraying; the running state of the execution device and the target value of the system state are set through the data processing module 2, so that the wastewater drying system is in a water spraying mode; the dry grinding mode is switched to a water spraying mode, V1=9000Nm3/h, V2=130 ℃, V3=0.5m3/h are carried out in the water spraying mode, and meanwhile, the lowest total air volume V1 is more than 7000Nm3/h, the bed temperature range is 125 ℃ and less than V2 and less than 140 ℃, and the lowest pulp supply V3 is more than 0.4m 3/h;
s5, enabling the water spraying mode to enter a slurry spraying mode: the wastewater drying system inputs wastewater, sets the running state of the execution device and the target value of the system state through the data processing module 2, and carries out wastewater drying treatment; the method comprises the steps of transitioning from a water spraying mode to a guniting mode, wherein V1=9000Nm3/h, V2=135 ℃, V3=0.7m3/h in the guniting mode, and simultaneously ensuring that the minimum total air volume V1 is more than 7000Nm3/h, a bed temperature interval of 130 ℃ is less than V2 and less than 145 ℃, and a grout supply interval of 0.5m3/h is less than V3 and less than 0.9m 3/h;
the slurry spraying mode comprises normal operation and fault operation, and in the normal operation, cleaning is carried out at regular time according to a preset time interval, and the dry grinding, water spraying and slurry spraying modes are automatically switched; during the fault operation, the system is switched to a water spraying state and a dry grinding state in sequence, the system is degraded to operate, the alarm module 4 is controlled to alarm, and after the system is maintained, the system is switched to a guniting mode to work, or the system is directly switched to a shutdown mode when the guniting mode has faults;
s6, shutdown mode: when normal work is finished or fault shutdown is carried out, the system enters a shutdown mode, the running state of the execution device and the target value of the system state are set through the data processing module 2, and shutdown is carried out in stages.
When the system is shut down, the mode main control module 1 judges that the system is in normal shutdown or fault shutdown according to P1 and P2, when the system is in fault shutdown in a guniting mode, a water spraying mode and a dry grinding mode are called, the operation states of a hot air blower, a cold air blower and a slurry supply regulating valve are controlled through the sub-control module 3, the target values of total air volume, bed temperature and slurry supply are set, and the system state is transited from a hot state to a cold state in stages; under the non-guniting mode, the sub-control module 3 controls the running states of the hot air blower, the cold air blower and the slurry supply regulating valve, sets the target values of the total air volume, the bed temperature and the slurry supply amount, and transits the system state from a hot state to a cold state in stages. In this embodiment, the system is normally stopped in 2 stages, the first stage is, V1=6000Nm3/h, V2=100 ℃, the amplitude of temperature change F2= -15 ℃/min, after reaching the first stage, the second stage is, V1=4000Nm3/h, V2=60 ℃, the amplitude of temperature change F2= -10 ℃/min, and the system state is transited from the hot state to the cold state in 2 stages.
Further, as shown in fig. 3, in steps S2-S7, the data processing module 2 sets the target values of the operating states of the actuators and the system states by setting the target values of the system states and the amplitude limits of the controlled variables through the data processing module 2, comparing the target values of the system states with the actual values, processing the comparison values through the PID regulator, and outputting the comparison values, and adjusting the operating states of the actuators according to the amplitude limits of the controlled variables from the actual values to the target values of the system states.
The control quantity amplitude limiting value is the limiting range of the change amplitude of the actuator when the actuator parameter changes, and if the bed temperature is reduced from 100 ℃ to 60 ℃ in a shutdown mode and is reduced by 10 ℃ every time, the control quantity amplitude limiting value set by the data processing module 2 is a range of 10 +/-1 ℃.
Specifically, the data processing module 2 is used for respectively setting target values of total air volume, bed temperature and slurry supply amount and control amount amplitude limiting values of the target values, then comparing the actual values with the target values in real time, adjusting the actual values by adjusting the frequency of the hot air blower, the frequency of the cold air blower and the opening degree of the slurry supply adjusting valve, finally adjusting the actual values to be consistent with the target values, and gradually adjusting the actual values by taking the set control amount amplitude limiting values as steps during adjustment.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Claims (10)
1. A full-automatic control system of a wastewater drying system is characterized by comprising a mode main control module (1), wherein an operation mode is arranged in the mode main control module and is used for setting operation mode parameters, starting and stopping a system and switching the operation mode; the mode main control module (1) is in signal connection with the data processing module (2) and the sub-control module (3), outputs start-stop instructions and operation mode parameter data to the processing module (2), and outputs the start-stop instructions to the sub-control module (3);
the data processing module (2) is in signal connection with the sub-control module (3), the alarm module (4), the state monitoring module (5) and the automatic cleaning module (6), receives operation mode parameter data of the mode main control module (1) and real-time state data of the state monitoring module (5), sets control parameter data according to the operation mode parameters, outputs the control parameter data to the sub-control module (3), outputs an operation mode switching instruction to the mode main control module (1) according to the real-time state data, and outputs the control data to the alarm module (4) and the automatic cleaning module (6);
the sub-control module (3) is in signal connection with the air volume control module (31), the bed temperature control module (32) and the slurry supply control module (33), receives start-stop instructions of the mode main control module (1) and control parameter data of the data processing module (2), and outputs control data to the air volume control module (31), the bed temperature control module (32) and the slurry supply control module (33);
the alarm module (4) receives the control data of the data processing module (2) and alarms when the system is abnormal;
the state monitoring module (5) is used for monitoring the running state of the system and outputting real-time state data to the data processing module (2);
and the automatic cleaning module (6) receives the control data of the data processing module (2) and is used for starting and stopping the automatic cleaning function and setting a timing cleaning period.
2. The fully automatic control system of waste water drying system as claimed in claim 1, wherein: the air volume control module (31), the bed temperature control module (32) and the slurry supply control module (33) are used for controlling the running state of the execution device; the executing devices are respectively a hot air blower, an air cooler and a slurry supply regulating valve.
3. The fully automatic control system of waste water drying system as claimed in claim 2, wherein: the control parameter data output by the data processing module (2) comprises an execution device running state and a system target value; the operation states of the executing device are respectively the operation frequency of the hot air blower, the operation frequency of the cold air blower and the opening degree of the slurry supply regulating valve, and the target values of the system states comprise target values of total air volume, bed temperature and slurry supply amount.
4. The fully automatic control system of wastewater drying system as claimed in claim 3, wherein: the operation modes comprise a starting mode, a preheating mode, a dry grinding mode, a water spraying mode, a slurry spraying mode and a stopping mode.
5. The fully automatic control system of wastewater drying system as claimed in claim 4, wherein: in the starting mode, the state monitoring module (5) checks the running state of the system and the running state of the execution device, and the sub-control module (3) receives a starting instruction of the mode main control module (1) and control parameter data of the data processing module (2) to control the execution device to run so as to achieve a precondition required by the preheating mode;
in the preheating mode, the data processing module (2) outputs control parameter data to the sub-control module (3), controls the running states of the hot air blower and the cold air blower, sets a target value of total air volume and bed temperature, and transitions the system state from a cold state to a hot state in 2-5 stages to achieve the precondition required by the dry grinding mode;
in the dry grinding mode, the data processing module (2) outputs control data parameters to the sub-control module (3) to control the running states of the hot air blower and the cold air blower and set the target values of the total air volume and the bed temperature, and the wastewater drying system is in a blowing cleaning state;
in the water spraying mode, the system inputs process water, the data processing module (2) outputs control parameter data to the sub-control module (3), the running states of the hot air blower, the cold air blower and the slurry supply regulating valve are controlled, the target values of the total air quantity, the bed temperature and the slurry supply quantity are set, and the wastewater drying system is in a clean state of the process water;
in the slurry spraying mode, the system inputs wastewater, the data processing module (2) outputs control parameter data to the sub-control module (3), the running states of the hot air blower, the cold air blower and the slurry supply regulating valve are controlled, the target values of the total air volume, the bed temperature and the slurry supply quantity are set, and the wastewater drying system is in a loaded working state;
in the shutdown mode, the sub-control module (3) controls the running states of the hot air blower, the cold air blower and the slurry supply regulating valve and sets target values of total air volume, bed temperature and slurry supply amount, and the system state is transited from a hot state to a cold state in 2-5 stages.
6. The fully automatic control system of wastewater drying system as claimed in claim 5, wherein: the shutdown modes include normal shutdown and fault shutdown; when the system is normally shut down, the mode main control module (1) outputs a shut down instruction to the sub-control module (3) to shut down in stages, and the system state is transited from a hot state to a cold state; when the system is in fault shutdown, the state monitoring module (5) outputs real-time state data to the data processing module (2), the data processing module (2) outputs control parameter data to the sub-control module (3) to shut down in stages, and the system state is transited from a hot state to a cold state.
7. The fully automatic control system of wastewater drying system as claimed in claim 6, wherein: the fault shutdown is divided into a guniting mode and a non-guniting mode, when the system is shut down in the guniting mode, the water spraying mode and the dry grinding mode are called, and the system state is transited from a hot state to a cold state; and in the non-guniting mode, stopping the machine in stages, and transitioning the system state from a hot state to a cold state.
8. The fully automatic control system of waste water drying system as claimed in claim 7, wherein: the automatic cleaning function comprises timing cleaning and fault cleaning, and the modes of slurry spraying, water spraying and dry grinding are automatically switched; and when the timing cleaning is carried out, the timing cleaning period is 1-100 h.
9. The method for controlling a fully automatic control system of a wastewater drying system according to any of claims 1 to 8, characterized by comprising the steps of:
s1, starting self-checking: the system is started, an alarm module (4) and a state monitoring module (5) are automatically started, the initial state of each module is checked, and the state of an execution device is adjusted;
s2, start mode enters preheat mode: the running state of the execution device and the target value of the system state are set through the data processing module (2), and the preheating mode is entered in stages;
s3, entering a dry grinding mode in a preheating mode: after the preheating mode is reached, the running state of the execution device and the target value of the system state are set through the data processing module (2), so that the wastewater drying system is in a dry grinding mode;
s4, the dry grinding mode enters a water spraying mode: after the dry grinding mode is achieved, the automatic cleaning module (6) controls water spraying; the running state of the execution device and the target value of the system state are set through the data processing module (2), so that the wastewater drying system is in a water spraying mode;
s5, enabling the water spraying mode to enter a slurry spraying mode: the wastewater drying system inputs wastewater, sets the running state of the execution device and the target value of the system state through the data processing module (2), and performs wastewater drying treatment;
the slurry spraying mode comprises normal operation and fault operation, and in the normal operation, the regular cleaning is carried out according to the regular cleaning interval, and the dry grinding, water spraying and slurry spraying modes are switched; in the fault operation, the slurry spraying mode is switched into a water spraying and dry grinding mode, and the alarm module (4) is controlled to alarm;
s6, shutdown mode: when normal work is finished or fault shutdown is carried out, the system enters a shutdown mode, the running state of the execution device and the target value of the system state are set through the data processing module (2), and shutdown is carried out in stages.
10. The control method of the fully automatic control system of the wastewater drying system according to claim 9, characterized in that: in steps S2-S7, the data processing module (2) sets the target values of the operating states of the actuators and the system states by setting the target values of the system states and the amplitude limits of the controlled variables through the data processing module (2), comparing the target values of the system states with the actual values, processing the comparison results by the PID regulator, and outputting the comparison results, and adjusting the operating states of the actuators according to the amplitude limits of the controlled variables from the actual values to the target values of the system states.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113816449A (en) * | 2021-08-25 | 2021-12-21 | 华能国际电力江苏能源开发有限公司南通电厂 | Zero-emission intelligent control system for desulfurization wastewater of thermal power generating unit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2442198A2 (en) * | 2010-10-18 | 2012-04-18 | Delaware Capital Formation, Inc. | Controller for water treatment |
| CN103543712A (en) * | 2013-09-27 | 2014-01-29 | 南通博士未来信息科技有限公司 | Full-automatic effluent treatment control device |
| CN107188258A (en) * | 2017-07-20 | 2017-09-22 | 中国华电科工集团有限公司 | A kind of vaporising device and control method applied to desulfurization wastewater |
| CN109101049A (en) * | 2018-10-26 | 2018-12-28 | 马鞍山当涂发电有限公司 | A kind of desulfuration absorbing tower pH value is exchanged work frequency hybrid control system and method |
| CN109205719A (en) * | 2018-09-28 | 2019-01-15 | 北京国电龙源环保工程有限公司 | Waste water zero discharge device drying system and its operation method |
| CN109603496A (en) * | 2018-11-29 | 2019-04-12 | 北京国电龙源环保工程有限公司 | A kind of modified desulfurizer pulp feeding system and its control system |
| CN209113525U (en) * | 2018-09-28 | 2019-07-16 | 北京国电龙源环保工程有限公司 | Waste water zero discharge device drying system |
-
2019
- 2019-09-23 CN CN201910899004.0A patent/CN110615496B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2442198A2 (en) * | 2010-10-18 | 2012-04-18 | Delaware Capital Formation, Inc. | Controller for water treatment |
| CN103543712A (en) * | 2013-09-27 | 2014-01-29 | 南通博士未来信息科技有限公司 | Full-automatic effluent treatment control device |
| CN107188258A (en) * | 2017-07-20 | 2017-09-22 | 中国华电科工集团有限公司 | A kind of vaporising device and control method applied to desulfurization wastewater |
| CN109205719A (en) * | 2018-09-28 | 2019-01-15 | 北京国电龙源环保工程有限公司 | Waste water zero discharge device drying system and its operation method |
| CN209113525U (en) * | 2018-09-28 | 2019-07-16 | 北京国电龙源环保工程有限公司 | Waste water zero discharge device drying system |
| CN109101049A (en) * | 2018-10-26 | 2018-12-28 | 马鞍山当涂发电有限公司 | A kind of desulfuration absorbing tower pH value is exchanged work frequency hybrid control system and method |
| CN109603496A (en) * | 2018-11-29 | 2019-04-12 | 北京国电龙源环保工程有限公司 | A kind of modified desulfurizer pulp feeding system and its control system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113816449A (en) * | 2021-08-25 | 2021-12-21 | 华能国际电力江苏能源开发有限公司南通电厂 | Zero-emission intelligent control system for desulfurization wastewater of thermal power generating unit |
| CN113816449B (en) * | 2021-08-25 | 2023-10-03 | 华能国际电力江苏能源开发有限公司南通电厂 | Zero intelligent control system that arranges of thermal power unit desulfurization waste water |
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