Beijing Leader & Harvest Electric Technologies Co., Ltd.
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1. Medium voltage VFD application in centrifugal compressor
Mix gas from butanol and octanol workshop and ethene enter into synthesis reaction tower. Gas phase of propanal is created by the action of catalyst, after cooling, coarse propanal is created. Air returns synthesis reactor through compressor. Liquid phase propanal enters into rectifying tower and propanal product is output.

2. Medium voltage starter aplication in site
Qinghai Zhongxinguoan Technology Developing Co., Ltd is a manufacturer of fertilizer and chemical material. It locates in center of ChaidamuBasin. Producing/living power is provided by itself power plant. The power grid capacity is limited and can not stand big impact. Principle of spray drying tower is like this: air passes filter and heater ...

3. Application and Practice of Medium-voltage VFD in Water Injection System of Oilfield
Injecting water into oil beds through water injection wells is an important developing measure widely used for ensuring the oil bed pressure and increasing oil-extracting speed and extraction rate of oil storage. In the water injection works of oilfields, water-injecting pumps are the source equipment for water injection of oilfield and ensuring oil bed pressure ...

4. Application of Medium-voltage VFD on Oil Pump Sets in Oilfields
Oil pumps are the main energy consuming equipment in the operation of oil storage tanks. To meet the requirements of production technology, the oil flow needs to be regulated in practical operation with the opening of the outlet valves of the oil pumps according to the working conditions. Rather high pressure-difference is generated before and after the outlet valves of the oil pumps ...

5. High voltage VFD application in technics of desulfuration circulating pump
Chuanxibei Gas Purification Plant of West-south Oil&Gas Branch Company in PetroChina locates in Jiangyou city Sichuan province. It takes natural gas from Jiangyou Zhongba gas field as raw material and makes purification. It is a key enterprise in Sichuan with daily purifying capacity 500000m3. Its main products includes sulfur, liquified petroleum and natural gas ...

6. New way of power saving and emission reduction in oil refinery
In refining process of shale retorting, in order to supply saturated air to redox reaction of shale semicoke from gas retort, centrifugal fan (main fan) sends air flow to underneath of gas retort. Motor of main fan is 6kV, 250kW. In actual operation, air flow should be adjusted according to demand of each process index. Air flow is adjusted manually via valve opening and outlet opening ...

Variable Frequency Drive