Equipment operation and maintenance costs are a crucial basis for the economic analysis of dust collectors. Below, we compare the operation costs of two types of dust collectors:
1. Operation energy consumption of bag dust collectors:风机energy consumption is high, while cleaning energy consumption is low. However, overall, the electrical consumption of both dust collectors is comparable. For particulate matter that is difficult to collect by electrostatic precipitators, or when the number of electrostatic precipitator fields exceeds 4, the energy consumption of electrostatic precipitators is higher than that of bag dust collectors. This means the operational costs of electrostatic precipitators would be higher than those of bag dust collectors. If the upcoming new environmental protection standards are to be met, electrostatic precipitators would have to employ 4 fields or more, resulting in higher energy consumption than bag dust collectors.
2. Maintenance costs for bag dust collectors primarily involve the cost of filter bag replacement. Based on current operational conditions, the replacement cost of a single filter bag can be offset by the savings in discharge fees over a period of 1.5 to 2 years, compared to the cost of electrostatic precipitators.
3. Economic analysis shows that the emission concentration of bag filters in actual operation is approximately 10% of that of electrostatic precipitators, resulting in the power plant paying about 1/10 of the emissions fee for electrostatic precipitators when using bag filters. Given the current national emissions fee collection situation, the reduction in emissions fee per furnace or annually after adopting bag filters is quite significant, ranging from several hundred thousand to over a million yuan. If the previous standard was met without any emissions fee, then the use of bag filters would exempt the power plant from paying emissions fees. Additionally, bag filters have a sulfur dioxide removal efficiency of about 5%, which can also reduce the emissions fee for sulfur dioxide from the power plant.
