Equipment Investment and Operation Cost Analysis of Ozone Preparation System
Ozone, an efficient green oxidant, has been widely used in engineering fields in recent years, including wastewater recycling, food preservation, medical disinfection and injection, semiconductor processing and so on. However, its equipment investment and operation cost are high, so it is necessary to establish a scientific and efficient operation management mechanism and input-output mechanism to improve its economic benefits. The process cost of ozone system mainly includes equipment investment and operation cost. The equivalent process cost is mainly composed of equipment depreciation and operation cost, in which the operation cost accounts for a higher proportion. In the operation cost, electricity, raw material and personnel costs account for the highest proportion.
The project of 10kg/h ozone production is taken as an example (Due to the difference of equipment performance index, the following data shall be subject to the mainstream equipment in the market.)The three main power units of 10kg ozone generator system include: ozone generator (installed power 80kW ~ 120kw), cooling system (chiller) (about 28 ~ 35kw), and oxygen preparation system (oxygen generator) (about 115KW ~ 150KW).The total operating power is about 180kW ~ 250KW (other electrical equipment such as pumps, fans and exhaust gas destroyers are not included in the statistics due to their relatively small power).According to the industrial power supply price of 1 yuan/kWh, the daily electricity charge of equipment operation is 4320 yuan ~ 6000 yuan, and the annual electricity cost is 1.58 million ~ 2.2 million. At present, the market price of 10 kg/h domestic ozone generator system is 500,000 ~ 1,200,000 yuan. The annual cost of equipment consumables (including the invisible cost caused by the decline of ozone generator production) is 5-10% of the equipment cost, and 2 operation and maintenance personnel are provided. The annual comprehensive cost of these two items is about 100,000 ~ 150,000 yuan. The comprehensive operation cost of the equipment is about 1.68-2.35 million yuan.
Comparison of operating costs with equipment depreciation
For intuitive analysis, the average value is adopted. That is, the equipment investment is 850000 yuan and the operation cost is 2 million yuan. It can be seen that the equipment investment has a low weight in the economic analysis of project input and output, and the high performance and low energy consumption ozone equipment should be given priority in project design. Onyx ozone equipment has the advantages of ultra-high concentration of ozone (≥ 200mg/L), ultra-low power consumption (average working condition ≤ 5W/g), and almost no attenuation in long-term operation. Its intelligent operation method reduces the manpower demand. Onyx ozone generator can produce ultra-high concentration ozone. Therefore, under the same ozone production, the oxygen intake volume is greatly lowered, thus reducing the power consumption of the oxygen generator. In addition, the ultra-low power consumption per unit ozone also helps to reduce the power consumption level of the ozone generator. At the same time, low power consumption means low heating, which reduces the cooling power of cold water. When the actual operation case is taken as a reference, the energy consumption of Onyx ozone generator body is reduced by more than 40% compared with similar products, and the comprehensive energy consumption of ozone preparation system (including oxygen generator and water cooler) is reduced by 25% ~ 35%.Based on the 10-year operation period of the project, the investment and operation cost can be saved by more than 30%.