Full-automatic static elimination system

Abstract

A full-automatic static elimination system comprises a workstation, a PLC control cabinet, a branch control box, a de-electrification device and a monitor, wherein the de-electrification device is a dual-polarity ionic wind-type static de-electrification device and is used for receiving a control signal of the PLC control cabinet, an explosion-proof chamber is arranged on the monitor, a static charge detection board is arranged in the explosion-proof chamber, the branch control box is used for processing instruction air provided by a factory, transmitting the air to the de-electrification device after filtering, purification and pressure reduction, simultaneously connecting an ionic wind control signal sent from the PCL control cabinet to the de-electrification device and receiving pressure, returned back from the de-electrification device, of a pressure feedback pipe to the PLC control cabinet, the PLC control cabinet is used for acquiring a material charge signal of the monitor, acquiring a material transmission state signal transmitted from the de-electrification device, calculating ionic wind polarity and strength output from the de-electrification device and eliminating staticcharge brought by a material with ionic wind, the workstation is provided with a liquid crystal display, various running conditions of the static elimination system can be monitored in real time, anddatabase storage and inquiry on a historical running curve can be performed.

Description

technical field [0001] The invention belongs to the technical field of pellet pneumatic transmission, and in particular relates to a fully automatic static elimination system. Background technique [0002] In the production process of polyolefin materials represented by PE and PP, the pneumatic conveying link can make the polyolefin pellets have 1-5μC / kg static electricity, and at the same time, the pellet pneumatic conveying link contains a certain amount of wire drawing, broken particles, etc. Polyolefin dust. At the same time, polyolefin may also be accompanied by ethylene, propylene as the representative monomer combustible gas escaping, and the critical value of no electrostatic discharge in the silo is 0.1-0.2μC / kg. The above situation causes electrostatic discharge. Dust explosion accidents in polyolefin silos are high. [0003] According to the statistics of 70 electrostatic dust explosion accidents in 13 sets of equipment in 10 domestic enterprises, 62 of them were...

AI Technical Summary

Problems solved by technology

The existing technology has poor reliability and low service life

[0007] In addition, the mechanical constant volume adopts the cylinder sampling method, which has a long cycle, discontinuous sampling, no data area in the middle of the sampling, poor tracking of material charge changes, power dissipation based on empirical values, poor convergence, and high residual electrostatic charge.

[0008] The mechanical constant volume adopts the cylinder sampling method. After the material is stopped, the system still does not know the change of the material conveying state, and the ion wind is still output according to the strength of the previous cycle, resulting in over-replenishment of the ion wind and over-replenishment of the charge in the bin, which poses a safety hazard.

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