The checker brick is an important part of the regenerator structure, because its reasonable structure not only affects the service life, but also directly affects the heat storage efficiency of the checker body. The ideal checker structure should have a long service life, good heat storage efficiency, The periodic temperature fluctuation is small, which is the principle of choosing the form of the checker brick structure in the design.
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There are many arrangements of checker bricks in the regenerator, mainly including Siemens type, Licht type, basket type, continuous channel type, cross-shaped form and tube-shaped form.
The Siemens structure is easy to clean and the airflow is smooth, but the heating area of the single checker body is small. The advantage of the Licht type is that the heating area of the unit checker body is large, but it is easy to block and inconvenient for cleaning and hot repair, so it is no longer used. Although the continuous channel structure has a small heating area per unit volume, its grid pores are not connected to each other, which can prevent airflow stratification and make the gas distribution uniform.
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The basket structure is an improved form of the continuous channel checker structure. Since the two end faces of the checker bricks are heating surfaces, the heating area per unit checker volume is good, and the stability is also good.
The cross-shaped checker brick is a new type of checker brick. Because the cross-shaped checker brick is made of fused-cast AZS brick, it has the characteristics of good high temperature erosion resistance, high bulk density, high heat capacity and high thermal conductivity.
It can be used for 7 to 8 years or even longer, with good heat storage efficiency and small periodic temperature fluctuations. It is an ideal checker body. The tube-shaped checker brick is also a new type of checker brick. The octagonal shape replaces the original straight brick. , the grid holes are chimney-shaped and not easy to be blocked.
It retains the physical and chemical properties of the original executive brick, and is convenient for masonry. The brick body is aligned up and down with basically no free hanging parts, the structure is stable, the heating area per unit volume of the checker body is high, and the service life is long. The wall thickness of the cylindrical brick can be reduced to 40mm, which not only reduces the weight of the unit checker, but also increases the thermal conductivity. The cost of the cylindrical checker is about 15% higher than that of the basket-shaped checker, and about 150% lower than that of the cross-shaped checker. However, in terms of energy saving, the cylindrical checker is not much different from the cross-shaped checker. The energy consumption increases by 1% to 2% per year, and the heat consumption of the cylindrical checker body increases by about 0.5% per year, which saves a lot of energy due to the slowing down of "aging".
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In the structural design of the regenerator, special attention should be paid to the connection between the cylindrical checker bricks and the grate, and the straight brick Siemens arrangement should be used to transition between the cylindrical checker bricks and the grate, with a height of about 1m. In this way, the checker holes can be smoothly connected up and down, and the uniformity of the distribution of the masonry into the cylindrical checker body can be improved, the advantages of the cylindrical checker bricks can be fully exerted, and the thermal efficiency of the glass melting furnace can be improved.
Zhengzhou Shennan Refractory Co.,Ltd are professional in producing high quality checker bricks ,any demands,please don't hesitate contact with me.
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