2results about How to "Maintain design" patented technology

This application discloses a boiler wall-mounted air supply system for burners arranged on the front and rear walls, including a secondary air duct structure, side air ducts, air boxes, and connecting air ducts installed on the front and rear walls of the boiler; a group of adjacent air outlets are horizontally opened on the water-cooled wall fins of the boiler side walls; one end of each of the multiple air ducts is connected to the secondary air duct structure, and the other end is connected to the air box; the other end of the air box is connected to the connecting air duct, and the connecting air duct is sequentially connected to the air outlets, for forming an air curtain from front to back on the side walls after air is supplied. This application solves the problem of poor corrosion resistance and poor combustion conditions caused by unreasonable air outlet spacing or arrangement in existing systems by opening adjacent air outlets on the boiler side walls to form an air curtain.

The pressure-sensitive adhesive sheet (X), which is a color-changeable pressure-sensitive adhesive sheet, is provided with a base material (10) and a pressure-sensitive adhesive layer (21). The base material (10) has a first surface (10a) and a second surface (10b) on the opposite side from the first surface (10a). The adhesive layer (21) is disposed on the first surface (10a). The substrate (10) includes a color-changeable layer (12) that can change color by an external stimulus. A first color change width (W1) of a color change region formed in the color change layer (12) by linearly applying an external stimulus to the color change layer (12), and a second color change width (W2) of a color change region after the color change layer (12) is further subjected to a heat treatment at 85 DEG C for 168 hours satisfy 0.5 < = W2 / W1 < = 1.5.