Simulation method and system of blast furnace feeding PLC system

Abstract

The invention discloses a simulation method and system for a blast furnace feeding PLC system. The method comprises the steps that internal simulation variables of blast furnace feeding equipment and a switching program of the simulation variables and actual variables are established; when a blanking command of the stock bin is given, the feeder and the vibrating screen equipment are simulated to start running, and when the weight of the weighing hopper is gradually increased to a set value, the feeder and the vibrating screen stop running; after the skip car starts to receive materials, the material conveying belt is sequentially started to run, the gate of the weighing hopper is opened, the weight of the materials in the weighing hopper is gradually reduced, and after the weighing hopper is emptied, the gate is closed, and the belt is sequentially stopped running; after material receiving of the skip car is finished, the skip car is started and stops running from the bottom of the blast furnace to the top of the blast furnace; in the material receiving and emptying process in the material tank, the pressure value and the material level value of the material tank are subjected to variable quantity monitoring; in the tilting and rotating process of the lower sealing valve and the linkage process of the throttling valve, the process that materials fall into the furnace is controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of PLC control systems, and in particular to a simulation method and system for a blast furnace charging PLC system. Background Art

[0002] Blast furnace charging control is a complex control process, involving multiple equipment and complex process linkage. If a blast furnace charging control system is debugged directly on site without simulation operation test, it will be difficult to ensure that there will be no errors. Once the program has errors, it will cause serious consequences. Especially for the batching and charging process, it is absolutely not allowed to run with materials before the blast furnace is opened. Therefore, system simulation is particularly critical and important.

[0003] System simulation usually includes hardware simulation and software simulation. Hardware simulation is to use the simulator provided by the programming software manufacturer to simulate the PLC system hardware, download the written control software to the simulator, and then run the simulator to simulate the actual PLC operation to debug the program. Software simulation is to use internal variables to replace the actual external input variable values ​​in the software program, develop various simulation function modules, simulate the startup and operation process of external equipment, and the operation change rules of input values ​​to simulate the equipment changes in the actual process, and use this to perform automatic chain simulation operation of the program. In the simulation process of the blast furnace charging PLC system in the existing technology, the process control of batching and charging is not accurate enough, resulting in the phenomenon that the simulation data is not real. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention discloses a simulation method for a blast furnace charging PLC system, which specifically comprises the following steps:

[0005] Establish the internal simulation variables of the blast furnace charging equipment and the switching procedure between the simulation variables and the actual variables;

[0006] When the bin unloading command is issued, the feeder and vibrating screen equipment will start running in simulation. When the weighing bucket weight gradually increases to the set value, the feeder and vibrating screen will stop running.

[0007] When the material truck starts to receive materials, the material conveying belt starts to run in sequence, the gate of the weighing bucket opens, and the weight of the material in the weighing bucket gradually decreases. After the weighing bucket is emptied, the gate closes and the belt stops running in sequence;

[0008] After the material car receives the material, it starts running from the bottom of the blast furnace to the top of the furnace and stops;

[0009] When the material car arrives at the furnace top, the receiving hopper receives the material from the material car and records the number of received batches and the number of cars in sequence;

[0010] After the receiving hopper finishes receiving the material, open the equalizing valve, relief valve and upper sealing valve in sequence to allow the material to fall into the material tank, and then close the equalizing valve, relief valve and upper sealing valve in sequence;

[0011] During the process of receiving and emptying the material in the tank, the pressure value and material level value of the tank are monitored;

[0012] During the tilting and rotation of the lower seal valve and the linkage of the throttle valve, the process of materials falling into the furnace is controlled.

[0013] A simulation system for a blast furnace charging PLC system, comprising:

[0014] The simulation interface module defines simulation variables and switches the variable interface between simulation variables and actual programs;

[0015] The silo unloading simulation module simulates the process of unloading materials from each silo to the weighing bucket;

[0016] The weighing bucket unloading simulation module simulates the process of unloading materials from the weighing bucket to the material truck;

[0017] The material cart loading simulation module simulates the movement of the material cart from the furnace bottom to the furnace top;

[0018] The furnace top hopper simulation module simulates the process from receiving materials to dropping materials in the furnace top hopper.

[0019] The furnace top valve simulation module simulates the process of the furnace top valve moving in sequence;

[0020] The tank pressure and material level simulation module simulates the changes in pressure and material level in the tank;

[0021] The furnace distribution simulation module simulates the distribution process from the material tank to the furnace.

[0022] Due to the adoption of the above technical scheme, the simulation method and system of a blast furnace charging PLC system provided by the present invention simulate the blast furnace charging process through the method, so that program errors can be discovered and corrected in advance. The occurrence of logical errors after the system is put into production and operation is greatly reduced, and the system operation stability rate is improved. In addition, operation training and system demonstration can be carried out in advance for post personnel. When on-site debugging has not yet been carried out (or has just begun), when the owner needs to understand and review the procedure, or requires operation training, the program can be simulated to perform demonstration and training, so that the post personnel are familiar with the operation interface and usage methods in advance, thereby shortening the engineering debugging cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 The structural block diagram of the simulation system of the blast furnace charging PLC system of the present invention is DETAILED DESCRIPTION

[0025] In order to make the technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention:

[0026] The present invention discloses a simulation method for a blast furnace charging PLC system, which specifically includes the following methods:

[0027] Establish the internal simulation variables of the blast furnace charging equipment and the switching procedure between the simulation variables and the actual variables;

[0028] When the bin unloading command is issued, the feeder and vibrating screen equipment will start running in simulation. When the weighing bucket weight gradually increases to the set value, the feeder and vibrating screen will stop running.

[0029] When the material truck starts to receive materials, the material conveying belt starts to run in sequence, the gate of the weighing bucket opens, and the weight of the material in the weighing bucket gradually decreases. After the weighing bucket is emptied, the gate closes and the belt stops running in sequence;

[0030] After the material car receives the material, it starts running from the bottom of the blast furnace to the top of the furnace and stops;

[0031] When the material car arrives at the furnace top, the receiving hopper receives the material from the material car and records the number of received batches and the number of cars in sequence;

[0032] After the receiving hopper finishes receiving the material, open the equalizing valve, relief valve and upper sealing valve in sequence to allow the material to fall into the material tank, and then close the equalizing valve, relief valve and upper sealing valve in sequence;

[0033] During the process of receiving and emptying the material in the tank, the pressure value and material level value of the tank are monitored;

[0034] During the tilting and rotation of the lower seal valve and the linkage of the throttle valve, the process of materials falling into the furnace is controlled.

[0035] like Figure 1The simulation system of a blast furnace charging PLC system shown specifically includes: a simulation interface module, a silo unloading simulation module, a weighing bucket unloading simulation module, a material cart loading simulation module, a furnace top intermediate bucket simulation module, a furnace top valve simulation module, a material tank pressure and material level simulation module, and a furnace in-furnace charging simulation module.

[0036] Furthermore, the simulation interface module is used to implement simulation variable definition, and variable interface and switching functions between the actual program.

[0037] The silo unloading simulation module is used to realize the functional simulation of the process from unloading materials from each silo to the weighing bucket.

[0038] The weighing hopper unloading simulation module is used to realize the functional simulation of the process from unloading the material from the weighing hopper to the material truck.

[0039] The material cart loading simulation module is used to realize the functional simulation of the material cart moving from the furnace bottom to the furnace top.

[0040] The furnace top receiving hopper simulation module is used to realize the functional simulation of the furnace top receiving hopper from receiving materials to dropping materials.

[0041] The furnace top valve simulation module is used to realize the process function simulation of the furnace top valve moving in sequence.

[0042] The tank pressure and material level simulation module is used to realize the functional simulation of the change process of the pressure and material level in the tank.

[0043] The furnace distribution simulation module is used to realize the process function simulation of distributing materials from the material tank to the furnace.

[0044] Furthermore, the simulation interface module establishes simulation variables inside the device and establishes a switching procedure between the simulation variables and the actual variables.

[0045] Furthermore, the silo unloading simulation module realizes the simulated start-up operation of the feeder, vibrating screen and other equipment after the silo unloading command is issued. After the weighing bucket weight gradually increases to the set value, the feeder and vibrating screen stop running.

[0046] Furthermore, the weighing bucket unloading simulation module realizes that after the material truck starts to receive materials, the material transport belt starts running in sequence, the weighing bucket gate opens, the weight of the material in the weighing bucket gradually decreases, and after the weighing bucket is emptied, the gate closes and the belt stops running in sequence.

[0047] Furthermore, in the material car loading simulation module, after the material car receives the material, the material car starts and runs from the bottom of the blast furnace to the top of the furnace and stops.

[0048] Furthermore, in the furnace top receiving hopper simulation module, when the material cart arrives at the furnace top, the receiving hopper receives the material from the material cart and records the number of received batches and the number of carts in sequence.

[0049] Furthermore, the furnace top valve simulation module opens the pressure equalizing valve, the relief valve, the upper sealing valve and other valves in sequence after the receiving hopper finishes receiving the material, so that the material falls into the material tank, and closes them in sequence after completion.

[0050] Furthermore, the tank pressure and material level simulation module realizes the change process of the tank pressure value and the material level value during the process of receiving and emptying the material in the tank.

[0051] Furthermore, the furnace distribution simulation module realizes the distribution process of the material falling into the furnace by linking the lower sealing valve, tilting, rotating and throttle valves.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A simulation method for a blast furnace charging PLC system, characterized in that include: Establish internal simulation variables of blast furnace charging equipment and the switching procedure between simulation variables and actual variables; When the bin unloading command is issued, the feeder and vibrating screen equipment will start running in simulation. When the weighing bucket weight gradually increases to the set value, the feeder and vibrating screen will stop running. When the material truck starts to receive materials, the material conveying belt starts to run in sequence, the gate of the weighing bucket opens, and the weight of the material in the weighing bucket gradually decreases. After the weighing bucket is emptied, the gate closes and the belt stops running in sequence; The material car starts to start after receiving the materials, and it runs from the bottom of the blast furnace to the top of the furnace and then stops; When the material car arrives at the furnace top, the receiving hopper receives the material from the material car and records the number of received batches and the number of cars in sequence; After the receiving hopper finishes receiving the material, open the equalizing valve, relief valve and upper sealing valve in sequence to allow the material to fall into the material tank, and then close the equalizing valve, relief valve and upper sealing valve in sequence; During the process of receiving and emptying the material in the tank, the pressure value and material level value of the tank are monitored; During the tilting and rotation of the lower seal valve and the linkage of the throttle valve, the process of materials falling into the furnace is controlled.

2. The simulation system of a blast furnace charging PLC system according to claim 1 is characterized in that include: The simulation interface module defines simulation variables and switches the variable interface between simulation variables and actual programs; The silo unloading simulation module simulates the process of unloading materials from each silo to the weighing bucket; The weighing bucket unloading simulation module simulates the process of unloading materials from the weighing bucket to the material truck; The material cart loading simulation module simulates the movement of the material cart from the furnace bottom to the furnace top; The furnace top hopper simulation module simulates the process from receiving materials to dropping materials in the furnace top hopper. The furnace top valve simulation module simulates the process of the furnace top valve moving in sequence; The tank pressure and material level simulation module simulates the changes in pressure and material level in the tank; The furnace distribution simulation module simulates the distribution process from the material tank to the furnace.

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