Sintering machine flue gas contains a large amount of sulfur dioxide and other harmful gases, which, if directly discharged into the atmosphere, will not only cause air pollution, but also cause serious harm to human health and the environment. Therefore, it is necessary to desulfurize the flue gas of the sintering machine.SDA (Semi-Dry Absorption) flue gas desulfurization technology is a commonly used flue gas desulfurization technology, which is to absorb and remove sulfur dioxide and other harmful gases in the flue gas by adding absorbents to the flue gas.
The main process of sinter SDA flue gas desulfurization technology includes the following steps: flue gas cooling, dry absorbent injection, reactor absorption, dust removal and waste residue treatment. Firstly, the sinter flue gas needs to be cooled down to bring its temperature down to a range suitable for desulfurization, usually around 120°C. The dry absorbent is then sprayed with the dry absorbent to reduce the temperature of the flue gas. Then, a dry absorbent is sprayed into the cooled flue gas, allowing it to react with the sulfur dioxide in the flue gas and adsorb it. Subsequently, the flue gas and the absorbent enter the reactor for a full absorption reaction to absorb down the sulfur dioxide in the flue gas. Finally, the dust and waste residue in the flue gas are processed through dust removal equipment and waste residue treatment equipment to meet the emission standard.
The advantages and disadvantages of sinter SDA flue gas desulfurization technology are similar to those of coke oven SDA flue gas desulfurization technology, as follows:
Advantages:
1. high desulfurization efficiency: sinter SDA flue gas desulfurization technology can effectively absorb and remove sulfur dioxide in the flue gas, and its desulfurization efficiency can reach more than 90%.
2. stable operation: sinter SDA flue gas desulfurization technology can be in a wide range of temperature, humidity and load stable operation, but also can adapt to certain flue gas flow changes.
3. Environmentally friendly: SDA flue gas desulphurization technology for sintering machine does not require the use of chemicals, which is friendly to the environment and can also reduce the carbon dioxide emissions in the flue gas.
4. Capable of recycling absorbent: SDA flue gas desulfurization technology for sintering machine can recycle and reuse the absorbent, which reduces the operation cost and environmental pollution.
5. Wide range of application: sinter SDA flue gas desulphurization technology is applicable to a variety of sintering industrial fields, such as iron and steel industry, metallurgical industry and so on.
Disadvantages:
1. Higher energy consumption: Sinter SDA flue gas desulphurization technology needs to use a lot of energy to cool the flue gas and spray absorbent, so its energy consumption is higher.
2. Large amount of absorbent is required: SDA flue gas desulphurization technology for sintering machine requires the use of a large amount of dry absorbent, which not only increases the cost, but also requires the recovery and reuse of absorbent, which increases the operation complexity.
3. Selection of absorbent: different absorbents have different absorption effects and costs for different harmful gases and particles, which need to be selected and compared according to the actual situation.
4. Higher requirements for equipment: Sinter SDA flue gas desulfurization technology has higher requirements for equipment, which requires the use of wear-resistant, corrosion-resistant equipment made of special materials, as well as the need for frequent maintenance and repair, which increases the operation and maintenance costs.
Taken as a whole, sinter SDA flue gas desulfurization technology is an effective flue gas desulfurization technology with the advantages of high desulfurization efficiency and stable operation, but there are also shortcomings such as high energy consumption, high absorbent selection and equipment requirements. In practical application, it is necessary to comprehensively consider its advantages and disadvantages, and select and optimize it according to the actual situation, in order to ensure the optimization of its desulfurization efficiency and economy. At the same time, it is also necessary to pay attention to other harmful gases and particulate matter that may exist in the flue gas of the sintering machine, and it is necessary to comprehensively consider its management to ensure that the flue gas emission meets the requirements of environmental protection.
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Post time: Aug-12-2023
