The ideal desulfurization method for boiler desulfurization dust collector

Due to the increasingly harsh environment, various heavy-sewage enterprises need to be vigorously rectified. The dust removal and desulfurization of boilers has become a top priority. In the past few years, due to environmental protection requirements, the desulfurization of various units of boilers has chosen to remove desulphurization. Desulfurization method, but its emission effect has not reached the current emission standards, and a better way is needed for desulfurization. At present, the most ideal way for desulfurization is magnesium oxide desulfurization and gypsum desulfurization. The emission effect is very good and the best is possible. A few milligrams of emissions.

    Characteristics of desulfurization of boiler desulfurization dust collector by gypsum method

    1. The lime-gypsum method for flue gas desulfurization has mature technology, mature operation, mature operation and management molding.

    2, the desulfurization efficiency is up to 95%, the applicability to coal types: no limit, can be used for high, medium and low sulfur coal, is the highest desulfurization efficiency method.

    3. Absorbent: limestone or lime. The source of desulfurizer is wide and the price is low.

    4. Desulfurizer Calcium-sulfur ratio Ca/S: ≤1.03, which is the method for maximum utilization and minimum consumption rate of desulfurizer.

    5, the desulfurization product is gypsum (calcium sulfate dihydrate), gypsum quality: about 90% purity, can be used as building materials, and easy to handle comprehensive utilization.

    6. Water consumption and wastewater volume are related to parameters such as flue gas and process water. The wastewater in the process can be reused after being treated.

    7. The unit has strong applicability and no restrictions, especially for large units. Utilization rate: greater than 95%.

    8. Floor space: Depends on site conditions. Power consumption: 1.2-1.6%, which is the larger one.

    9. Limestone-gypsum method is the preferred desulfurization process recommended by the State Environmental Protection Administration. The use of wet desulfurization can meet the requirements of the “Technical Policy for Prevention and Control of Sulfur Dioxide Emissions from Coal-Fired Emissions” promulgated by the State Environmental Protection Administration (Huanfa (2002) No. 26 Text)

    Characteristics of Desulfurization of Magnesium Desulfurization in Boiler Desulfurization Dust Collector

    1. Mature technology

    It has many years of experience in practical operation, and has perfected the operation of all links, enabling it to perform efficient and stable desulfurization work and achieve emission standards.

    2. Adequate raw materials

    The reserves of magnesium oxide in China are very considerable, accounting for about 80% of the world. Its resources are mainly distributed in Liaoning, Shandong, Sichuan, Hebei and other provinces.

    3, high desulfurization efficiency

    Magnesium oxide is much larger than the calcium-based desulfurizing agent in terms of chemical reactivity, and the molecular weight of magnesium oxide is smaller than that of calcium carbonate and calcium oxide. Therefore, the desulfurization efficiency of magnesium oxide is higher than that of the calcium method under the same conditions. Under normal circumstances, the desulfurization efficiency of magnesium oxide can reach more than 98%.

    4. Low investment costs

    Since the desulfurized magnesium oxide itself has its unique superiority, the structural design of the absorption tower, the amount of circulating slurry, the overall scale of the system, and the power of the equipment can be correspondingly small, so that the investment cost of the entire desulfurization system Can be reduced by more than 20%.

    5, low operating costs

    The same amount of SO2 magnesium oxide is removed by 40% of calcium carbonate; the ratio of magnesium to liquid gas is below 7L/m3, which greatly reduces power consumption.

    6, reliable operation

    Desulfurization of magnesium oxide can ensure the safe and effective operation of the whole desulfurization system. At the same time, the pH value of magnesium method is controlled between 6.0 and 6.5. Under such conditions, the corrosion problem of equipment has also been solved to a certain extent. In general, magnesium desulfurization has a very strong guarantee for the safety performance in practical engineering.