Energy efficiency used in bag filters

In industrial plants, power consumption is an important part in production costs. The reasons range from the inherent characteristics of the project, even without quality facilities and inadequate application. In this scenario, the electric motors are decisive role due to widespread use in industry by the versatility and effectiveness. But improvements and innovations are always needed, due to overwhelming demand for engines, which allow good opportunities in the domestic market.

The exhaust system filter sleeve section of the deburring area I Casting WEG Electric Equipment Company SA, has at least three dead deburring machines (average 12h/dia) due to changes in demand in the process. Thus, the collection points for these machines are unnecessarily exhausting.

The Department of WEG Service in partnership with Renner Textil Ltda., Developed a project to reduce energy consumption in the exhaust system through the implementation of a permanent magnet motor powered by variable frequency drive, using an electronic pressure for monitoring the filtration process.

Realising the pressure control system of the engine exhaust WMAGNET. This control has become possible due to the motor has constant torque throughout the speed range, being driven by a frequency inverter CFW-11 to keep the exhaust system within its ideal operating characteristics. The control of the exhaust system was monitored by the new release Renner Textil, an electronic pressure Renner model DPF-REG-20, developed specifically for this type of engine.

By closing the "damper" pickup tube deburring machine, which was idle, the pressure transmitter DPF-REG-20 recognizes the high pressure system, controlling the engine speed WMAGNET within the operating conditions, reducing substantially the energy consumption. To make the control was performed to calculate minimum operating speed, curing any possibility of sedimentation, fouling and / or obstruction of the exhaust system. Closing the three points to capture the speed of the system rose from 35 to 30 m / s, higher than the minimum operation, which is 25 m / s.

The exhaust system, operating the engine with Standard, shows no reduction in power consumption. For close to abstraction points for a loss of load on the engine, reducing performance, which maintains a high level of energy consumption.

The motors are permanent magnet synchronous WMAGNET with different characteristics. The engine has WMAGNET high energy magnets inside the rotor, in a configuration specifically designed to minimize vibration, noise and maximize efficiency across the range of variation of speed. Serves applications such as hoods, fans, compressors, elevators, centrifugal pumps, conveyors, electric vehicles and others.

The gauge indicator and differential pressure transmitter or static DPF-REG-20, operates signal 4-20 mA, IP65 for dust and water, fully programmable via three buttons, with the possibility of digital communication tools for the PC and PLC. Suitable for automation systems in a bag filter, heat exchangers and air damper false.

The methodology was developed with the standard engine (16 dampers open) and after the engine WMagnet + pressure transmitter DPF-REG-20 (with 1, 2 and 3 dampers closed). There is a gradual decrease in energy consumption, as the closing of the dampers, shown in the chart alongside.

The change of equipment with the motor and controller WMAGNET DPF-REG-20, delivered an 53.7% reduction in power consumption. This is due to motor efficiency WMAGNET (95.2%) exceeds 2.7% the engine Standard.

Still tied to the speed control, only possible because of the unique feature found on line WMAGNET, which maintain constant torque throughout the rpm range. Essential for applications in exhaust systems, since that would preclude the reduction of speed, when there was a loss of pressure in the system.

The control equipment for FPD-REG-20, with rapid response and adjustment of pressures in the process, demonstrated an enviable efficiency for the new release of Textile Renner, developed specifically for this type of engine.

Given the solution close to various points of exhaustion, we come to the conclusion that this improvement can be implemented in other companies that have the same production profile of WEG, using motor WMAGNET (WEG) and DPF-Controller REG- 20 (RENNER TEXTILE).

Besides the reduction of energy consumption is also achieved gains with increasing lifetime of the sleeves between 2-4 months, and reduction of compressed air for cleaning of sleeves.

Source: Journal Online Filter Media