1、 The advantages and disadvantages of using desulfurization and dust collectors in working conditions and environments;, To remove the sulfur element from coal. The desulfurization and dust removal device is relatively inexpensive and widely used in industrial production, becoming the mainstream equipment for flue gas denitrification in some coal-fired power plants. Disadvantage: The fuel contains sulfur, and a certain amount of SO3 will be generated during the combustion process. After adding the catalyst, under aerobic conditions, the amount of SO3 generated significantly increased, and NH4HSO4 was formed with excess NH3. NH4HSO4 has adhesive and corrosive properties, and in severe cases, it can cause damage to the tail equipment of the flue gas pipeline. Although the production of SO3 is limited, it is still necessary to prevent catalyst poisoning and take preventive measures. 2、 What aspects should be understood when choosing a desulfurization and dust collector? 1. Pressure loss: The pressure loss of dust removal refers to the pressure drop or resistance of gas from the dust collector to the outlet. The pressure loss of the desulfurization and dust collector depends on the following three factors. (1) Pressure loss of equipment structure. (2) Pressure loss of filter material. Related to the properties of the filter material (such as porosity, etc.). (3) The pressure loss of the dust layer accumulated on the filter material. 2. Export dust concentration: The export dust concentration refers to the emission concentration of the dust collector, expressed in the same way as the inlet dust concentration. The size of the export dust concentration should be based on local environmental protection requirements or user requirements. 3. Operating pressure: The operating pressure of the desulfurization and dust collector is determined by the static pressure values and installation positions of the devices and fans before and after the dust collector, and is also the design pressure resistance value of the desulfurization and dust collector. 4. Usage temperature: For desulfurization and dust removal equipment, its usage temperature depends on two factors: on the one hand, the high temperature tolerance of the filter material, and on the other hand, the gas temperature is above the dew point temperature. At present, due to the extensive use of fiberglass filter media, its high operating temperature can reach 280 ℃. Cooling measures are taken for gases above this temperature, and heating measures are taken for gases below the dew point temperature. There are many PPS filter materials used now, with a temperature of 170 ℃. For desulfurization and dust collectors, the relationship between operating temperature and dust removal efficiency is not obvious, which is different from electrostatic precipitators. For electrostatic precipitators, temperature changes can affect the specific resistance of dust and other factors that affect dust removal efficiency. 5. Processing air volume: refers to the volume of gas that can be purified by dust removal equipment per unit time, and is one of the important factors in the design of desulfurization and dust removal equipment. When designing or selecting a desulfurization and dust collector based on air volume, it is generally not allowed to operate the dust collector beyond the specified air volume. Otherwise, the filter bag is prone to clogging, the service life is shortened, the pressure loss increases significantly, and the dust removal efficiency also decreases; But the air volume should not be chosen too high, otherwise it will increase equipment investment and land occupation. The reasonable selection of air volume for processing is often determined based on process conditions and experience. 3、 Precautions for maintenance of desulfurization and dust removal equipment Dust removal equipment is widely used in major factories and enterprises. Its main function is to protect the living environment we rely on for survival, avoid the harm of industrial dust and desulfurization, and promote our continuous development and progress. Why is desulfurization and dust removal equipment recognized by everyone? For example, factories that need desulfurization need to go to desulfurization and dust removal equipment, and the working efficiency of desulfurization and dust removal equipment is very high. However, good equipment cannot be maintained without maintenance. So, in order to ensure the continuous operation and use of the desulfurization and dust collector we purchased, daily maintenance is essential. Next, we will introduce the precautions that should be taken when repairing the desulfurization and dust collector. 1. First, check for leaks in the gaps and inspect for corrosion and leakage in the water supply pipeline. 2. Check if there is any leakage at the connection between the desulfurization and dust collector and the flue. 3. Check if the water overflow channel is blocked again and if the water level in the overflow channel remains at the test height. 4. To clean up the accumulated dust in the inlet flue of the desulfurization and dust collector. 5. Check if the water blocking eaves on the upper and side of the flue of the desulfurization and dust collector are normal. 6. Regularly inspect or replace the drainage pipeline of the water film dust collector, as well as the water overflow tank. We must remember to regularly inspect and replace the dust collector accessories when using any desulfurization and dust collector, in order to avoid damage to the dust collector and affect our normal operation. 4、 Introduction to some flue gas desulfurization techniques for desulfurization and dust removal. The so-called flue gas desulfurization technique is to separate the sulfur-containing gases in the flue gas through technical means, perhaps converting them into other liquid substances, thereby reducing damage to the atmospheric environment. The desulfurization skills of flue gas can be divided into the following categories: 1. Semi dry powder desulfurization skills. This skill method involves a chemical reaction to remove the emitted sulfur dioxide. In practice, it involves absorbing the heat from the flue gas through the water in the lime slurry, and then evaporating it. During this process, calcium sulfate is formed by the combination of lime and sulfur dioxide. 2. Dry desulfurization skills. Dry desulfurization techniques can be divided into three types: dry powder spray desulfurization, electron activation oxidation, and charged dry powder spray desulfurization. These three desulfurization methods ultimately produce dry powder substances, which can reduce air pollution and damage. 3. Wet desulfurization skills. This desulfurization technique is now widely used by us, including sodium alkali method, limestone method, and seawater desulfurization method. If the sodium alkali method removes sulfur dioxide through a chemical reaction, causing a chemical reaction between sodium carbonate and sulfur dioxide, it ultimately forms sodium sulfite; The limestone method also uses chemical reactions to remove sulfur dioxide. If sulfur dioxide is combined with limestone to form gypsum; If the seawater desulfurization method absorbs sulfur dioxide from the flue gas of thermal power plants through seawater, and then reacts with oxygen in the air to produce sulfates, it can ultimately be discharged into seawater, which can greatly reduce the degree of atmospheric pollution.
