43results about How to "Shorten flame length" patented technology

The invention discloses an afterburner integrated with a stabilizer and a worm wheel rear rectification support plate. A combustion part in the afterburner is integrated with a worm wheel rear load-bearing framework; the worm wheel rear rectification support plate is integrated with an inner culvert flame stabilizer, and cooling air is fed; a fuel oil supply pipe and a fuel oil nozzle are arranged in the rectification support plate; main fuel oil is transversely sprayed out from two sides of the support plate; and duty fuel oil is sprayed out from a groove on the rear surface of the stabilizer to form a duty flame. A pneumatic appearance of an outer culvert flame stabilizer is designed as a V-shaped bluff body, and the cooling air is fed into the outer culvert flame stabilizer; a fuel oil pipeline is arranged in the outer culvert flame stabilizer; the main fuel oil is transversely sprayed by a baffle plate nozzle; and the duty fuel oil is sprayed out from a groove on the rear surface of the outer culvert flame stabilizer. An annular flame stabilizer is arranged between the inner culvert flame stabilizer and the outer culvert flame stabilizer, so that functions of the stabilizer and a flame coupler are realized in a circumferential direction. The internal parts of the afterburner are integrated, so that the part utilization efficiency is improved, and the engine thrust-weight ratio is increased.

The invention aims at providing a cracking-gas fuel injection device for chemical regenerative cycle, comprising an inner hub, a middle hub, an outer hub, inner-stage swirl vanes, outer-stage swirl vanes and a center body cap hood, wherein the inner-stage swirl vanes are arranged between the inner hub and the middle hub; the outer-stage swirl vanes are arranged between the middle hub and the outer hub; a central through hole is arranged in the inner hub; a fuel feeding channel is formed between the inner hub and the central through hole and is closed by the center body cap hood; the inner hub is provided with an inlet channel of cracking gas fuel; the middle hub is provided with a cracking gas ring cavity; a spraying nozzle is arranged at the end part of the cracking gas ring cavity; a divergent channel is formed by the inner-stage swirl vanes and the outer-stage swirl vanes; and gas sprayed from the spraying nozzle enters a combustion chamber through the divergent channel. The cracking-gas fuel injection device provided by the invention has the advantages that the cracking gas fuel and air can be well mixed, so that the length of flame is further shortened, the length of the combustion chamber can be shortened, and further the structure of a gas turbine becomes compact.

The invention discloses a coal powder turbulent burner comprising a pre-burning chamber and a burner body. The burner body comprises a central air pipe, a primary air pipe and a secondary air pipe. The front end of the burner body extends into the pre-burning chamber. By arranging a truncated-cone-type blunt body diverging in the airflow direction at a primary air outlet of the primary air pipe, the mixing time of secondary air airflow of the secondary air pipe and coal powder airflow is prolonged, the length of a flame formed by burning of coal powder at an opening of the primary air pipe isdecreased, and low-nitrogen burning is facilitated; meanwhile, by arranging the truncated-cone-type blunt body, the secondary air airflow of the secondary air pipe forms a strong backflow area at a secondary air outlet, the burning temperature in the pre-burning chamber is decreased, and the coking phenomenon in the pre-burning chamber is effectively avoided; and the truncated-cone-type blunt bodyand the pre-burning chamber are matched in use, therefore, the truncated-cone-type blunt body can suck high-temperature flue gas in a furnace in a rolling mode, the anti-interference capability of the pre-burning can be improved during burning, and accordingly the steady burning performance of the coal powder is improved.