7results about How to "No escape" patented technology

The invention provides a hydrogen-ammonia mixed low-nitrogen combustor, and belongs to the technical field of combustors. The technical problem of gas combustion with hydrogen and ammonia serving as fuel at present is solved, and the problems that due to the fact that the ammonia combustion reaction activity is poor, the hydrogen combustion speed is high, a nozzle is burnt by tempering, and the NOx emission concentration is high are solved. The device comprises a hydrogen introduction pipe, an ammonia gas introduction pipe, a fuel gas mixer, an annular header, ammonia gas branch pipes and ammonia gas nozzles. The hydrogen introducing pipe comprises a central hydrogen pipe and a combustion-supporting hydrogen pipe, the outlet end of the central hydrogen pipe is located in the annular collecting box, the input end of the combustion-supporting hydrogen pipe is connected with the central hydrogen pipe, the output end of the combustion-supporting hydrogen pipe is connected with the fuel gas mixer, and the output end of the ammonia introducing pipe is connected with the fuel gas mixer; the output end of the gas mixer is connected with an annular header, the annular header is connected with a plurality of ammonia branch pipes, the ammonia branch pipes are annularly arranged, and ammonia nozzles are arranged at the outlet ends of the ammonia branch pipes. The device is mainly used for hydrogen-ammonia mixed combustion.

The invention relates to a light-weight pressure-maintaining gas-maintaining coring device for a deep coal mine and a using method, the coring device comprises an outer pipe, a center rod, a core barrel, a pressure-maintaining controller, a clamp spring and a core falling prevention device, the lower end of the outer pipe is connected with a coring drill bit, the lower end of the center rod is connected with the core barrel, and the core falling prevention device and the clamp spring are installed at the lower end of the core barrel; the core falling prevention device is positioned below the clamp spring and above the coring drill bit; the core falling prevention device comprises a plurality of discs arranged in the circumferential direction and an elastic piece used for driving the multiple discs to be folded and closed towards the middle. The core falling prevention device is added, so that the equipment has a core falling prevention function, and when the rock core is broken by the snap spring, the core falling prevention device can effectively prevent a coal sample from falling out of the rock core barrel, and the heart taking rate is increased.

This utility model relates to the technical field of spray dust suppression devices, and discloses a spray dust suppression device for a roadheader. It includes a threaded head, a water supply pipe fixedly installed at the bottom of the threaded head, a branch pipe fixedly installed at the bottom of the water supply pipe, and a three-stage mist particle covering dust suppression mechanism fixedly installed at the end of the branch pipe away from the water supply pipe. This roadheader spray dust suppression device, through its three-stage mist particle covering dust suppression mechanism, utilizes three high-pressure atomizing nozzles (a first, second, and third nozzles) with different angles and layouts. High-pressure atomizing nozzle a first nozzle blocks upward-rising dust, high-pressure atomizing nozzle a second nozzle captures dust escaping from the edges, and high-pressure atomizing nozzle a third nozzle forms a three-dimensional interception barrier. The three nozzles complement each other in their coverage, effectively covering and suppressing dust in the area above and to the sides of the conveyor belt, while simultaneously blocking dust escape channels, thus improving the overall dust suppression efficiency of the roadheader's transport section.