136results about How to "Multiple contact areas" patented technology

The invention discloses a table panel which comprises an upper panel, a lower bottom plate and at least a pair of embedded pieces, wherein the upper panel is provided with a smooth external surface; the lower bottom plate is provided with a plurality of pits; the pits are arrayed on the lower bottom plate in a staggered manner; the top surfaces of the pits are propped against the internal surface of the upper panel; and the embedded pieces are arranged on the two opposite sides between the upper panel and the lower bottom plate. The top surfaces and side walls of the pits can bear pressure from the upper panel, so that the compressive capacity of the upper panel is improved, and the higher strength of the table panel even with less thickness can be ensured. Particularly, the total area of the pits account for 30-70% of the area of the lower bottom plate, the contact area of the top surfaces of the pits with the internal surface of the upper panel is larger, and the strength of the table panel is further improved. Particularly, when the area of the single pit is 1-15cm<2>, the number of the pits is increased, that is, the area of the top surfaces and the side walls of the pits is increased, and the strength of the table panel is greatly improved.

The invention discloses a tabletop board which comprises an upper panel, a lower base plate and at least one pair of internal embedded parts. The upper panel is provided with a flat outer surface, the lower base plate is provided with a plurality of sunken parts, the sunken parts are arranged on the lower base plate in a staggered mode, and the top faces of the sunken parts abut against the inner surface of the upper panel; the internal embedded parts are arranged on the two opposite edges inside the upper panel and the lower base plate. The top faces and the side walls of the sunken parts can well bear pressure from the upper panel, so that the pressure resistance of the upper panel is improved, and the higher strength can be ensured while the wall thickness of the tabletop board is smaller. Particularly, when the total area of the sunken parts accounts for 30-70% the area of the lower base plate, the contact area between the top faces of the sunken parts and the inner surface of the upper panel is large, and the strength of the tabletop board is improved. Particularly, when the area of each sunken part is 1-15 square centimeters, the number of the sunken parts is increased, the areas of the top faces and the side walls of the sunken parts are increased, and the strength of the tabletop board is greatly improved.

The invention provides a preparation method for a denitration catalyst. The preparation method comprises the following steps: reacting a manganese salt, salt compounds and thiosulfate in a solvent, thereby obtaining a reaction product, wherein the salt compounds include permanganate, ferric salt or cerium salt; and roasting the reaction product to obtain the denitration catalyst. The preparation method provided by the invention is used for preparing the denitration catalyst through a hydrothermal synthesis method; the prepared denitration catalyst has an urchin-like morphological structure as well as a loose and porous structure, and can be used for providing more contact area, reducing the diffusion resistance and increasing the utilization rate of the active center of the denitration catalyst in the denitration process. Therefore, compared with the catalyst prepared by the conventional method, the denitration catalyst prepared by the preparation method disclosed by the invention has relatively good denitration activity. According to the experimental results, when the denitration catalyst provided by the invention is adopted to perform denitration on the industrial flue gas at 150-250 DEG C, the denitration rate is over 80%.