Full automatic dry mortar mix plant compostion and process flow
Author：ANT CONSTRUCTIONS Comefrom： Createdate：2020/10/29 15:39:20 Hits：16
Full automatic dry mortar mix plant compostion and process flow
ANT CONSTRUCTION complete set dry mortar plant equipment mainly consists of sand drying system (sand dryer), raw material storage and batching system, mixing system, finished product storage silo, packaging system and electrical control system.
Full automatic dry mortar mix plant compostion
1. Sand drying system
The system includes a wet sand disc feeder, a inclined belt conveyor and a trible cylincer sand dryer. The disc feeder is composed of a wet sand storage hopper and a frequency conversion speed control belt conveyor. The wet sand is loaded by the loader, put in the storage hopper and fed through the frequency conversion speed control belt conveyor, then the wet sand enter the dryer through the inclined feeding belt conveyor . The trible cyclinder sand dryer includes a hot wind furnace, a drying host, and a cyclone dust collector; according to the moisture content of the raw sand (moisture content ≤ 8% ), the feeding speed is adjusted through the frequency conversion speed control belt conveyor to make the discharged dry sand moisture content ≤0.5%; the requirement of output dry sand temperature after drying is 60℃~70℃ to avoid the influence of the material temperature on subsequent production.
2. Raw material storage and batching system
The powder raw materials enter the storage silo directly from the bulk tanker by the conveying pipeline.
After the wet sand is dried, it is lifted from the bucket elevator to the top of the silo and discharged in three ways: the dried sand in one way is directly stored in the fine sand silo; the sand in the second way is dried and stored in the coarse sand silo; After drying, the third-way sand enters the screening machine, after classified different sizes enters the different sizes sand silos accordingly.
The admixture is lifted to mixer floor by a dual-use elevator, the bag is manually opened and then put into the admixture storage silo.
Other small amounts additives are measured in the laboratory then lifted to the mixer floor by a dual purpose elevator.
The batching system can be set the corresponding parameters according to the product formulas. The powder and small additives are batchting by the screw machine. In order to ensure the measurement accuracy and control the metering drop and blanking inertia, all screw machines are equipped with butterfly valves. The admixture screw conveyor also uses frequency conversion processing to make the metering accuracy more accurate.
3. Mixing system
The mixing system mainly uses a double-shaft paddle-blade weightless mixer. The interior of the machine is composed of paddles. The strong turning speed can reduce the mixing time, the critical parabolic speed can make the materials to be mixed unifromly. Therefore, twin shafts paddle mixer is The first choice for mass production dry mortar.
4. Finished product storage and packaging system
The mixed material mixed by the double-shaft mixer in this system enters the finished product transition hopper and in one way sent to the silo of the packaging machine through the screw machine for bag packaging. The mixed material of the other way enters the finished product transition hopper and is discharged in three ways through the lower three-way distributor: one way is sent to the silo of the packaging machine through a screw machine for packaging; the second way is sent through a screw conveyor and bucket elevator put it into the finished product temporary storage warehouse, and then send it into the weighing hopper by the screw conveyor under the warehouse, and carry out the large bag bulk through the lower bulk feeder; the third way is sent to the finished mortar silo via the screw conveyor and bucket elevator for storage. When it is needed, open the valve and send it to the bulk tanker from the bulk feeder under the silo.
5. Overview of the control solution
A PLC-based computer control system is used to realize comprehensive real-time monitoring and process control of raw material ingredients and mixing equipment. The key component PLC of the executive layer drives various actuators to complete the tasks according to the process parameters set by the computer, the signals from the field feedback of the programmed PLC.
5.1 Batching control system
The system control cabinet is in the central operating room. When ingredients are needed, first select and confirm the required ingredients on the computer operation screen, click the start button on the screen, and prepare ingredients in the order setting. The ingredients are de-gross weight first, then the discharge valve is opened, the screw conveyor is opened with a delay, and the frequency converter controls the conveying speed of the screw. Preset the weight of coarse and fine materials feeding on the batching instrument. Carry out coarse materials feeding first, and then fine materials feeding. After one material is prepared then start the next material with a delay. After all the materials are prepared, the discharge starts and enters the mixer.
5.2 Mixing control system
The system is based on the principle of centralized management and decentralized control, focusing on the simplicity and economy of the system: the control system adopts the Siemens S7 series products with high performance which has high reliability and small maintenance . It is a modular knot, easy to replace.
Convenient programming and maintenance: Completely compile the control program in accordance with the process instructions, and fully consider the system interlocking requirements when designing to ensure the safety and reliability of the system.
Various management information can be input, the fault information and records can be displayed and printed, as well as statistical reports of shift/day/month/year output. All English operation. The control mode is freely selected among manual/semi-automatic/automatic freely.
System security: Total of 3 levels operation authority (operator, technician, engineer) password restrictions.
The easy learning of the system: various fault alarms are provided online and recorded. Click the alarm bar and the system will automatically provide the fault solution to facilitate maintenance personnel to troubleshoot.
It can be set to print each batch of production records manually or automatically;
Complete data management, including product management, material management, and operator management;
Complete material production report management system, including shift report, comprehensive report, and output production report;
Detailed production record management which can check and print the produced data;
When the shift is transferred, the operator and the inspector log in directly without logging out of the system, which is convenient for recording work of the operator and the inspector;
Three emergency stop production methods: pause, emergency stop, and stop current batching after the batch is completed during the production process;
Real-time dynamic simulation of the production flow chart, intuitive image;
Operator password login to prevent persons without authority entering the operating system;
The powder silo can automatically breaks the arch, or manually breaks the arch during production, flexible in operation;
The powder silo high and low material level automatic alarm function, sound or light prompt, manual elimination, flexible operation;
There is a setting window for production parameters and control parameters, which can flexibly modify the discharge and delay time of the mixer according to the production, the drop and the speed, the mixing time, the air break switch time, etc.
Complete data management, including product management, material management, and operator management; record product number, specification, weight, material management: record material number, type, name, and supplier name. Operator management: Manage the operator number, name, title, work card number, and password.
Complete material production report management system, with material consumption, including shift report, comprehensive report, output production report; production data, statistics of vehicle number transportation, and printing functions
