Hot gas filter elements have many important applications in industrial production. The following are some of the main aspects:

Metallurgical industry

1. Metal smelting process

- In metal smelting, such as the smelting of steel, copper, aluminum and other metals, a large amount of high-temperature gas will be produced. These gases contain impurities, such as dust, metal oxide particles, etc. Hot gas filter elements can be installed in the exhaust system of the furnace to filter the discharged high-temperature gas. For example, in the blast furnace of steel smelting, the filter element can prevent the impurity dust in the charge from entering the subsequent gas treatment equipment and the atmospheric environment, ensuring the air quality of the surrounding environment of the furnace, and preventing impurities from accumulating in the equipment and affecting the performance of the equipment.

- For some special metal alloy smelting, the gas purity requirements are high. Hot gas filter elements can effectively remove harmful components in high-temperature gas, prevent these components from polluting the smelted metal alloys, and ensure the quality of the alloy.

2. Metal processing heat treatment

- In the heat treatment process of metals, such as quenching, tempering, annealing and other processes, high-temperature furnace gas will be produced. These furnace gases may contain impurities such as oil stains and scale. Hot gas filter elements are used to filter these impurities, which can extend the service life of heating elements and insulation materials in heat treatment furnaces. For example, in continuous heat treatment furnaces, the recycled furnace gas can be purified by filter elements, which can reduce the adhesion of impurities on heating elements, reduce energy consumption, and ensure the uniformity of heat treatment effects.

Chemical Industry

1. Chemical Reaction Process

- Many chemical reactions are carried out under high temperature conditions and produce a large amount of process gas. These gases may be mixed with impurities such as unreacted raw materials, catalyst particles, and reaction by-products. Hot gas filter elements can be installed on the gas outlet pipe of the reactor or reaction tower to filter the discharged hot gas. For example, in the synthesis of ammonia, the high-temperature and high-pressure synthesis gas contains impurities such as iron catalyst particles. These impurities can be removed by filter elements to prevent them from entering the subsequent gas cooling and separation equipment, avoiding equipment blockage and corrosion.

- For some chemical processes that require the recycling of process gases, such as fluidized bed reactors, hot gas filter elements can ensure the purity of the circulating gas and improve the reaction efficiency. It can filter out the fine powder products or unreacted solid raw materials produced during the reaction process, so that the circulating gas meets the reaction requirements and reduces the waste of raw materials.

2. Chemical product drying process

- In the drying process of chemical products, such as drying ovens or spray drying towers, high-temperature humid air or tail gas will be generated. These gases contain impurities such as product particles and droplets. Hot gas filter elements can be placed in the exhaust system to prevent product particles from being discharged with the tail gas and causing product loss, while avoiding the condensation of droplets on the outside of the equipment to cause environmental pollution and equipment corrosion. For example, in the spray drying process of ceramic pigments, hot gas filter elements can intercept pigment particles that are not completely dried, ensure that the discharged gas meets environmental protection requirements, and protect the surrounding equipment and environment.

Energy industry

1. Thermal power generation

- In the boiler system of a thermal power plant, the combustion of coal, fuel oil or natural gas will generate a large amount of high-temperature flue gas. These flue gases contain a large amount of impurities such as dust, unburned carbon particles and acidic gases. Hot gas filter elements are an important part of the dust collector, which is used to perform preliminary filtration of flue gas at high temperature to remove larger particles of dust. For example, before the electrostatic precipitator, the hot gas filter element can reduce the burden of the electrostatic precipitator and improve the dust removal efficiency. At the same time, it can also reduce the corrosion of acidic gas to subsequent equipment to a certain extent and extend the service life of the equipment.

- For the cogeneration system, the hot gas filter element can also be applied to the exhaust system of the waste heat boiler. The waste heat boiler uses the waste heat of industrial waste gas to generate steam. If the impurities in its exhaust are not filtered in time, it will affect the waste heat recovery efficiency and the safe operation of the equipment. The hot gas filter element can effectively purify the exhaust of the waste heat boiler and ensure the stable operation of the system.

2. Waste incineration power generation

- High-temperature and highly corrosive flue gas will be generated during the waste incineration process. The flue gas contains a large amount of dust, heavy metal particles, acidic gases, dioxins and other harmful substances. The hot gas filter element plays a key role in the flue gas treatment system of the waste incineration plant. It can filter out most of the dust and heavy metal particles under high temperature environment and reduce the load of subsequent processing equipment. For example, using the hot gas filter element for pre-filtration before the bag filter can prevent large particles from damaging the bag and extend the service life of the bag. At the same time, hot gas filter elements also help control the emission of harmful substances such as dioxins, and reduce the generation and emission concentration of dioxins by adsorbing and filtering impurities in flue gas.

Glass and ceramic industry

1. Glass manufacturing

- In glass melting furnaces, the high-temperature gas produced by combustion contains a variety of impurities, such as raw material dust, refractory erosion products, etc. Hot gas filter elements can be installed in the exhaust system of the melting furnace to filter these high-temperature gases. It can prevent impurities from entering the chimney, reduce the accumulation of dust and corrosion in the chimney, and ensure the relative stability of the atmosphere in the melting furnace. For example, in the production process of float glass, a clean melting furnace atmosphere is crucial to the quality of the glass surface, and hot gas filter elements help maintain this high-quality production environment.

- In the glass processing process, such as glass annealing furnaces, high-temperature gases are also generated. Hot gas filter elements can filter out impurities in the gas and prevent impurities from depositing on the glass surface, affecting the optical properties and appearance quality of the glass.

2. Ceramic firing

- The exhaust temperature of the ceramic firing kiln is high, and contains impurities generated by the ceramic body during the firing process, such as residues after the combustion of organic matter, impurity particles in the body, etc. The hot gas filter element is used to filter these impurities, which can improve the environment around the kiln and reduce the impact on surrounding equipment and staff. At the same time, in the firing process of some advanced ceramics, such as electronic ceramics, the atmosphere purity requirements are high. The hot gas filter element can help maintain a pure firing atmosphere and improve the quality of ceramic products.