3results about How to "Avoid hot spots" patented technology

A low-NOx ammonia-coal stable combustion swirl burner relates to the field of clean combustion of coal with low carbon and low NOx. This invention addresses the problems of ammonia slip and high NOx emissions in existing ammonia-coal co-combustion technologies. In this invention, a primary air / pulverized coal duct is fitted onto a central NH3 duct, forming a primary air channel between them. An outer NH3 duct is fitted onto the primary air / pulverized coal duct, forming an NH3 channel between them. An inner secondary air duct is fitted onto the outer NH3 duct, forming an inner secondary air channel between them. An outer secondary air duct is fitted onto the inner secondary air duct, forming an outer secondary air channel between them. Tangential and axial blades are respectively installed in the inner and outer secondary air channels. This invention is used for pulverized coal swirl combustion.

The invention particularly relates to a multi-jacket liquid nitrogen ice plug freezing method using a non-uniform gap structure, and belongs to the technical field of nuclear power plant pipeline freezing, and the method comprises the following steps: step 1, determining the total length L1 of jackets and the number N of the jackets of a pipeline freezing section; 2, calculating the value range of the total gap length L2 of the jacket of the frozen section of the pipeline; and step 3, designing and distributing non-uniform gaps. By designing the non-uniform jacket gaps, energy regulation and control are carried out in the ice plug forming process, so that the initial freezing position is accurately controlled, the complete freezing time is shortened, the pressure bearing capacity of the ice plug is improved, and finally energy conservation and efficiency improvement are achieved.

The application provides a photovoltaic module connecting and mounting structure, which comprises at least two adjacent photovoltaic modules, each of which comprises photovoltaic module glass, a corrugated back plate and a frame, the photovoltaic module glass and the corrugated back plate are bonded by structural adhesive to form a bearing unit, a prefabricated silicone strip is clamped into the bearing unit in the direction of the long side of two sides, a preset hole is arranged on the frame, a rivet is installed through the preset hole and an angle code, a structural weld is formed by laser welding a stainless steel welding wire at the joint of the frame and the corrugated back plate, a sealant is filled in the gap between the folded edge of the corrugated back plate and the photovoltaic module glass, a penetrating self-drilling screw hook fixing piece is arranged between the frame bending grooves of two adjacent photovoltaic modules, and the penetrating self-drilling screw hook fixing piece is clamped and limited to a lower support piece through a self-tapping screw.