Abstract: A system for synchronously recovering nitrogen and carbon dioxide from boiler flue gas includes: a flue gas pretreatment system used for dehydrating and cooling boiler flue gas; a carbon and nitrogen separation system communicated with the flue gas pretreatment system, and used for performing pressure swing adsorption on the pretreated flue gas and separating the nitrogen-containing vent gas and the crude carbon dioxide gas; a carbon dioxide secondary purification system communicated with the carbon and nitrogen separation system, and used for performing secondary purification on the crude carbon dioxide gas separated from the carbon and nitrogen separation system; and a nitrogen concentration and purification system communicated with the carbon and nitrogen separation system and the carbon dioxide secondary purification system, and used for purifying the nitrogen-containing vent gas separated from the carbon and nitrogen separation system and the vent gas generated by the carbon dioxide secondary purificatio

Abstract: A toy assembly that includes a bat structure and balls. The bat structure can be used to bat a ball like a traditional baseball bat. The bat structure can also be loaded with a ball, wherein the bat structure can launch the ball pneumatically. The bat structure has a cylindrical section. A piston head is disposed within the cylindrical section. A ball retention ring is coupled to the end of the cylindrical section. A tapered section of the bat structure is coupled to the opposite end of the cylindrical section. A handle is attached to the tapered section using a mechanical connector. A piston rod is coupled to both the handle and the piston head. A ball is set into the ball retaining ring. The piston head can then be advanced within the bat structure. This creates high pressure that eventually launches the ball.

Abstract: A collapsible sports goal that can be selectively configured between an erect configuration and a folded configuration. The sports goal has six frame elements. Each of the frame elements has two opposite ends. Each end of the frame elements connects to the end of another frame element using six connector joint assemblies. Each of the joint assemblies receives and interconnects a different two of the six frame elements. Each of the connector joint assemblies contains a hinge joint that enables the frame elements connected to each of the six joint assemblies to rotate about said hinge joint between a parallel configuration to a perpendicular configuration. When all of the connector joint assemblies are in their perpendicular configuration, the sports goal is in its fully erect configuration. Conversely, when all of the connector joint assemblies are in their parallel configuration, the sports goal is in its fully folded configuration.

Abstract: A toy assembly that includes a bat structure and balls. The bat structure can be used to bat a ball like a traditional baseball bat. The bat structure can also be loaded with a ball, wherein the bat structure can launch the ball pneumatically. The bat structure has a cylindrical section. A piston head is disposed within the cylindrical section. A ball retention ring is coupled to the end of the cylindrical section. A tapered section of the bat structure is coupled to the opposite end of the cylindrical section. A handle is attached to the tapered section using a mechanical connector. A piston rod is coupled to both the handle and the piston head. A ball is set into the ball retaining ring. The piston head can then be advanced within the bat structure. This creates high pressure that eventually launches the ball.

Abstract: A collapsible sports goal that can be selectively configured between an erect configuration and a folded configuration. The sports goal has six frame elements. Each of the frame elements has two opposite ends. Each end of the frame elements connects to the end of another frame element using six connector joint assemblies. Each of the joint assemblies receives and interconnects a different two of the six frame elements. Each of the connector joint assemblies contains a hinge joint that enables the frame elements connected to each of the six joint assemblies to rotate about said hinge joint between a parallel configuration to a perpendicular configuration. When all of the connector joint assemblies are in their perpendicular configuration, the sports goal is in its fully erect configuration. Conversely, when all of the connector joint assemblies are in their parallel configuration, the sports goal is in its fully folded configuration.