how-to-choose-ceramic-accumulator .
Honeycomb ceramic accumulator as the key and core components of regenerative high temperature combustion technology, the selection of honeycomb ceramic accumulator is very critical.
How to choose ceramic accumulator, ① The choice of material. ② Selection of pass aperture. ③ Overall shape and size selection
The following points should be noted when selecting honeycomb ceramic heat accumulator:
① The choice of material.
The choice of material. The working temperature of the honeycomb ceramic accumulator in the working condition gradually decreases from the nozzle to the outside. And the honeycomb ceramic accumulator at different temperature positions should be made of different materials according to the working position. In order to meet the temperature performance requirements and appropriately reduce the material cost.
The high temperature section is usually made of zirconium corundum. chromium corundum and silicon carbide honeycomb ceramic accumulator. Which has high refractorability and good slag resistance. The central part is made of mullite material; The low temperature section is made of cordierite. Which is characterized by good corrosion resistance and rapid cooling and heat resistance under the working condition of less than 1000℃.
② Selection of pass aperture
The hole shape of honeycomb ceramic heat accumulator often has square holes, round holes, hexagonal holes and other holes, the hole distance is usually between 3-6mm. Which hexagonal hole surface layout is more uniform, the structure is more stable, is the most commonly used hole type.
In addition to matching the medium pressure, flow rate and burner burning capacity, the selection of the aperture should also pay attention to the actual medium quality conditions, such as for the blast furnace gas with large water and dust content.
③ Overall shape and size selection
The most common hole surface sizes of them are 100×100mm and 100×150mm. The small hole flow length of a single piece of honeycomb ceramic heat accumulator is usually 100mm,. and there are plane, inclined, single slot, double slot and other end faces at both ends of the hole surface.
In terms of shape and size, the most common problem is. The gap between bricks is too large or too tight. And too large and easily shaped into a high temperature smoke exhaust channel. And easy to cause secondary combustion in the heat storage room to damage the honeycomb ceramic heat storage body. If it is too tight, there is no thermal expansion space between the bricks and it is not easy to install.