Application of mass flow meter in barrel liquid filling line

Abstract: The application information of mass flow meter in barreled liquid filling line is provided by excellent flow meter and flow meter manufacturers and quotation manufacturers. Abstract: Some people's experience has concluded that it is more accurate to use mass flowmeters for high-precision filling above medium capacity. People have achieved success with the self-developed mass flowmeter automatic production line. This article mainly introduces the use of mass flowmeters in barreled liquids. Irrigation. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the application article details of mass flowmeters in barreled liquid filling lines. The experience of some people has concluded that it is more accurate to use mass flowmeters for high-precision filling of medium and above volumes. People have achieved success with the self-developed mass flowmeter automatic production line. This article mainly introduces the use of mass flowmeters in barreled liquid filling. The application in the line, as well as the characteristics of the entire automatic filling production line. 1. Foreword The filling of barreled liquids is very common in the chemical and food industries. For medium or above filling volumes (above 10Kg), the filling methods generally use electronic weighing and flow meter types, among which electronic weighing methods are domestic. There have been a large number of applications. Due to the development of flowmeter technology, especially the successful experience of using mass flowmeters in recent years, we believe that it is more reasonable to use mass flowmeters for high-precision filling with medium capacity and above. A self-developed automatic production line that uses a mass flowmeter to measure strong corrosive viscous liquids with high precision. This line covers almost all aspects of the barreled liquid filling line and is of typical significance. 2. Overview of filling production line 2.1 Material characteristics and process conditions 1) Filling material temperature: 5~35℃ 2) Material density: organic acid about 1.2g/cm3, organic acid salt about 1.3g/cm33) Material viscosity: organic acid About 50CP, organic acid salt about 150CP4) Inlet pressure of feed pipeline:≥0.2MPa, fluctuation range±10% 5) The whole device meets GMP hygiene requirements. Filling capacity: 25L (square barrel); 200L (round barrel); 1000L (IBC barrel) Filling accuracy: (quality accuracy): 0.1%, filling accuracy meets European standards“OIMLR61-11996issue”Standard filling speed: 25L barrel (30kg): 6 barrels/minute; 200L barrel (250kg): 1 barrel/minute; 1000L barrel (1200kg): 1 barrel/4 minutes 2.2 Process flow Empty barrel finishing——Empty barrels into the filling station——Detection and positioning——Filling head down——filling valve open——start filling——Quality measurement——reach 90%×(set value - compensation value)——The throttle valve becomes smaller——reach 100%×(set value - compensation value)——Filling valve closed——Vacuum adsorption——Full barrel out of the filling station——turn——hanging cover——screw cap——labelling——palletizing——twine——Finished product output 2.3 Overview of filling system The whole filling system consists of mass flow meter, control valve, filling head, bracket, guide rail, pneumatic actuator, control system, etc. (see schematic diagram) Figure 1 (1) Filling system precision filling The accuracy of the filling system mainly depends on the accuracy of the mass flowmeter, the filling speed and the stability of the system. (2) When filling with over-flow control, the actual filling volume must be greater than the set flow of the mass flowmeter. It must be set by the PLC program, and the flowmeter is required to send a signal in advance to control the closing of the filling valve, so as to ensure the actual filling. The amount is consistent with the set amount of the mass flowmeter. (3) Flow control (filling speed control) In order to ensure the accuracy of the filling system, the filling speed of the filling system is designed to be fast and slow, and the flow control valve automatically controls the filling speed by controlling the flow rate. Since the precise amount of opening of the control valve will not affect the filling accuracy, the use of the current automatic regulating valve on the market is expensive, inconvenient to install and needs to increase control requirements, so the flow control valve adopts a self-designed three-position valve. Butterfly valve, namely maximum opening (fully open), 1/3 opening (can be manually set and adjusted), fully closed, has outstanding advantages and stable performance. (4) After the anti-drip filling is completed, the viscous material remaining on the surface of the filling head will take a certain period of time to flow out, so that the material will drip onto the surface of the container and cause pollution. The design of the filling system uses a vacuum generator to suck back. The system ensures no dripping. The vacuum generator has the advantages of large suction flow, simple structure, low cost, quick vacuum generation and release, and convenient installation and maintenance. (5) Filling head The filling valve of the filling head adopts a self-designed pneumatic shut-off valve, which has a simple structure, quick opening and closing, easy cleaning and good sealing. 2.4 Flowmeter selection There are many kinds of flowmeters. The selection of flowmeters is mainly determined according to material characteristics and on-site process conditions. For filling with high precision requirements, only mass flowmeters can be selected. The metering system of a mass flow meter consists of a sensor and a transmitter for signal processing.
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