- Time:Jul 24, 2022
Different incinerators have different properties of refractory materials due to their different working conditions. The refractory material of the incinerator should be selected according to its working environment and use temperature. Since the input part of the incinerator is in contact with the waste, the temperature changes greatly, and clay bricks with good wear resistance, heat resistance and impact resistance are used; the drying chamber and the combustion chamber are wear-resistant, corrosion-resistant, not easy to adhere, alkali-resistant, resistant to Oxidized clay bricks, high alumina bricks, SiC bricks, castables and plastics; pipes and gas cooling parts are made of alkali-resistant, water-resistant, heat-resistant and impact-resistant castables.
In the industrial production process, a large amount of wastewater is produced, most of which can be treated by traditional biochemical or physical methods, but there is still a small amount of high-concentration wastewater with COD as high as hundreds of thousands or even millions, but also contains inorganic Salt, traditional wastewater treatment methods are a reasonable solution for high-concentration wastewater.
The characteristics of the waste liquid incinerator are as follows: (1) It adopts a tangential atomization device - an internal mixed two-fluid atomizer, which has extremely high mixing degree, atomization effect, combustion speed and efficiency, and a low excess coefficient, which can save a lot of fuel. (2) The vortex effect is good, the burning residence time is more than 2 seconds, and the burning has no dead ends. (3) High combustion safety, the control logic program has the function of not excluding flammable and explosive gases before ignition, design incinerators with different shapes and furnace linings according to the composition and characteristics of wastewater, and design different furnace temperatures according to the content of salt in wastewater The control method ensures that the inorganic salt does not hang on the furnace wall, and the salt mist is rarely formed outside the furnace. (4) Fully consider the utilization of waste heat after wastewater incineration, which can generate hot water or steam for production and use. (5) Waste water, skin oil and waste solvent can be treated at the same time and discarded, and the operating cost is low. (6) The waste liquid incinerator can treat waste water and a small amount of solid waste water. Suitable for incineration materials: non-flammable high-concentration (BOD, COD) wastewater, waste liquid, organic acid, organic alkali, combustible waste liquid, waste solvent, etc. It can treat organic waste gas, coating waste gas, malodorous gas, etc. at the same time.
Combustion and chemical treatment of hydrochloric acid industrial waste can release less polluting gases into the atmosphere, while at the same time recovering useful components as a means of paying for products. Therefore, the demand for refractory materials suitable for the waste liquid incinerator of the plant has also increased. The shape of this furnace, such as waste liquid method, combustion method, chemical treatment method, etc., varies due to the design of the process design company, but most of the furnace types are circular. Most types of waste liquids are sprayed down from the top of the furnace. The combustion nozzles are set down from the top and tangential from the intermediate wall, and the combustion nozzles are injected with the waste liquid. The exhaust gas outlets are located in the upper and lower parts.
Refractory material manufacturers: waste liquid waste incinerator lining refractory material, for example, the temperature in the furnace is generally 800~1000℃, and the temperature of the high temperature part of the combustion chamber can reach 1500~1600℃. Use refractory materials, basic acid-resistant high-alumina plastics, and the effect is good. Wear-resistant parts, use wear-resistant casting materials. The furnace wall is lined with plastic with a thickness of about 150mm. The cushion is made of heat-insulating castables with a thickness of about 150mm. However, when the temperature of the steel plate drops below the dew point of hydrochloric acid, the steel plate is easily corroded, so it is necessary to build a furnace wall structure to keep the temperature of the steel plate at 120-160 °C. Around the burner with the most severe operating conditions, high-alumina plastic with high aluminum content higher than the furnace body is used.
While increasing the number of furnaces capable of preventing public hazards and using by-products, there is often a need for refractory materials that are used under more stringent conditions. Therefore, it is necessary to further study refractory materials and improve construction technology.
