Application of Low Voltage Inverter in Chemical Industry

2022-06-14

The frequency converter market in the chemical industry mainly comes from equipment matching and transformation projects, accounting for about 40% each, and the rest comes from spare parts and replacement. In the chemical industry, frequency converters are mainly used in fans, pumps and mechanical speed control equipment. The chemical industry has many branches, and the production process varies greatly. The power range of the inverter used is very wide, ranging from less than 1KW to several thousand kilowatts of inverter products.

The application of inverters in the chemical industry varies greatly, and corresponding users can be found in various grades of products in this industry. Therefore, the chemical industry is the industry with the most complex inverter brands, and almost all brands have a market in the chemical industry.

1. Application of low-voltage inverter in pumps

In the chemical industry, the transportation of materials is inseparable from the pump. In most cases, the flow (pressure) needs to be adjusted. In the past, the throttle valve (constant pressure pump) or the diverter valve (constant volume pump) was used to adjust the flow. Throttling loss or shunt loss are redundant power consumption. For example, using a low-voltage inverter to directly adjust the pressure and flow of the pump can save a lot of power.

2. Application of low-voltage inverter in fan

With the continuous development of the industry, the application of fans is becoming more and more extensive, especially in the chemical industry, which can be applied to fans. However, there is a problem of excessive air volume in fan design. When the air volume needs to be adjusted, throttling is generally used, that is, the damper adjustment method, which is unnecessary loss. After using a low-voltage inverter for speed regulation, it can be easily adjusted according to actual needs. , because the unnecessary loss is removed and the power factor is improved at the same time, the comprehensive power saving rate is above 30%.

3. Application of low-voltage frequency converter in speed-regulating machinery

In the machinery that needs speed regulation, such as: extruders, material feed regulation, conveyor belts, etc. basically use slip regulation motors, three-phase commutator motors or DC motors for speed regulation, the speed regulation performance of speed regulation motors is not good, and the speed is stable. Poor performance, high failure rate and low efficiency. However, DC motors and commutator motors have complex structures, high failure rates, and high maintenance costs. Sparks are generated when they work, which is extremely unsafe. The speed regulation stability of the above motors is poor. If an asynchronous motor and a low-voltage inverter are used to replace the above motors, the efficiency can be greatly improved, the power saving, the maintenance amount is small, the safety and reliability, and the investment return period is short, which is extremely beneficial to improving the economic benefits of the enterprise.